New Circuits Page 157
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Here's the schematic for my Bee Counter test board with the functional units labeled to make them easier to discuss. This test board has the same circuitry as the larger board, but with only 4 gates instead of 44 to save a TON of time and money debugging....
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Alkaline Battery Charger, Battery Charger , This circuit was specifically designed to recharge alkaline cells. The unusual connection of the transistor in each charging unit will cause it to osci...
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A very stable and simple FM transmitter circuit is given here. With a matching antenna, this transmitter can attain a range of around 200 meters. I assembled this transmitter few years and got very good results. Let us see how the circuit works. A condenser....
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Pentode is astable phantastron during radar search, and d-c amplifier during lock-on when pentode furnishes direct control of klystron repeller. -NBS, "Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, " Vol. 1, Electron Tube circuits,....
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Here is very simple circuit in which the LED becomes ON only after a preset time the power supply is switched ON. When the power supply is switched on the transistor will be OFF. The capacitor now charges via the preset R3 and when the voltage across C1 is....
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This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, Analog Multiplier, Multiplier Circuit, log-antilog circuit, analog multiplication, controlled gain amplifier, summing junction,....
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The following circuit shows about Line Follower Sensor Circuit Diagram. Features:Simple circuit, Infra-Red LEDs D1 and D2 will emit Infra-Red ....
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The H-bridge: The H-bridge is a commonly known, and commonly used way to drive a brushed DC motor. It allows for simple forward/reverse drive, ....
-
Modification of the Icom IC-718 Transceiver for ALE, to de-activate the transmit bandpass relays during receive and scanning....
-
The circuit was designed based on the operation of Siemens UAA180 as it functions as a LED driver for light band displays for measuring the level of audio signals...
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-
A couple of few years ago I had build a diode-sensor based RF powermeter using a 68HC11 microprocessor. Even before that I had build an analog RF powermeter with thermal power sensor. And I found datasheets of logarithmic amplifiers very interesting, that....
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Producing and manipulating the sine wave function is a com- mon problem encountered by circuit designers. Sine wave circuits pose a significant design challenge because they rep- resent a constantly controlled linear Oscillator Sine wave circuitry is....
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The LM317T is a adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1. 5 amps over an output range of 1. 25 to 37 volts. The device also has built in current limiting and thermal shutdown which makes it essentially blow-out....
-
The AN12974A Audio Power Amplifier features built-in AGC circuitry and Spatializer environ, . , The Spatializer environ, is Desper Products, Inc. `s exclusive signal processing technology that is able to generate surround sound for low-power mobile....
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-
This is Infra-Red Remote Control Tester circuit. This circuit is used to test go/no-go of any remote control transmitting infra-red (IR) light. The supply of this circuit is 3V battery. This circuit has some advantages, such as fits in a compact enclosure,....
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This project uses a small, common electret microphone to convert audio to an electrical signal. These are the cheap microphones found in most PC headsets. The microphone output must be amplified and zeroed before it can be recorded with the MSP430. This is....
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can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5 minute intervals within the hour. 4 additional LEDs are used to indicate 1 to 4 minutes of time..
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Four 4, 8 Volt 2000mA Nickel Cadmium batteries. Does anybody here know a safe way of initial charging those batteries from a lab power supply I do not have a NiCad charger so I need to make one. Any circuit drawings of a simple NiCad charger I will be glad....
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The Intelligent Fan Controller will control the speed of computer fans based on the temperature inside your computer and reduce the noise made by your computer Intelligent Fan Controller 4-wire 2-wire 3-wire speed computer pic microchip PIC18F2550 18F2550....
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Field strength meter circuit is a very useful device for measuring the RF output of any transmitter or experimenting different antennas with the transmitter. The work of the field strength meter (FSM) is simple it converts RF energy in to DC voltage and this....
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This article provides a detailed description of our methodology for testing power supplies in three major parts. The first one lists PSU parameters we check out and specifies the test conditions. In the second section you`ll find terms often voiced by PSU....
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An almost identical recreation of the SAP-1 Simple As Possible microprocessor, as published in Digital Computer Electronics by Albert Malvino and Jerald Brown. While the book is out of print an "ebook" can be found fairly easily if you know where to look. I....
-
We select the so called phase shift oscillator as a first example as it exemplifies verysimply the principles set forth in the previous blog post. The circuit is drawn to show clearly the amplifier and feedback network. The circuit consists of a common....
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Many tools can be used with a musical instrument to produce various sound effects and the simplest form is the repetition of tone or a method often called echo . Such equipment to create one more turn on the music that you hear. Circuit diagram is for....
-
Starting from today I will try to post interesting Arduino projects from around the web. I am novice in this domain but I am giving my best to fully understant it. I must say from the begining that the projects are not developed by me and I will link the....
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This is a design circuit for audio graphic equalizers, that are very common as commercial products but circuits for them are very rarely published. This circuit is a simple design circuit. The circuit is need an op-amp for amplifying the input signal. This....
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By using a simple visual indicating system, this small transistor tester allows you to run a quick go/non-go` check on NPN as well as PNP transistors. If the device under test is a working NPN then the green LED (D1) will‚ash, while the red counterpart....
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Inverter or ondulator, is an electronic circuit used to turn direct current (DC) into alternating current (AC). The function of an inverter is to change the voltage of entry of direct current (it normally comes from a battery of 12 or 24 Vdc) to an alternate....
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This circuit above uses a 13 volt zener diode, D2 which provides the voltage regulation. Aprroximately 0. 7 Volts are dropped across the transistors b-e junction, leaving a higher current 12. 3 Volt output supply. This circuit can supply loads of up to 500....
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This smoke detector circuit diagram is based on the SD2 CMOS Photo-Electric Smoke Detector Integrated Circuit manufactured by Supertex INC and include almost all needed components to build a very simple and high efficiency smoke detector project. The LED....
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You can use a humidity sensor to give an alert of boat leakage, or when your books start being flooded by heavy rain attack on your broken roof, or anything you...
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The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep After....
-
This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect and disconnect) the switch depending on the sound input. The output switch of this circuit is act by a relay...
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New applications for DC voltage converters, such as the workhorse` LT1070, arise every day. These converters can be adapted to nearly every imaginable ratio of input and output voltages. However, all of these circuits and devices have the same shortcoming,....
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This triac-based 220V AC motor speed controller circuit is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the....
-
Taking inspiration from the good folks at Nanode and an Instructable I saw recently, I`ve come up with another AVR based Ethernet board that can be programmed and used like an Arduino. It`s a simple design based on the ATMega and Microchip`s ENC28J60....
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A 20 Band EQ for my 900Watt MOSFET Power Amplifier. The Output Level would drop by the Ammount of resistors, so for 2 Equal Resistors, I should amplify it by a gainof 3. Would that propably work Eek, that is very confusing. The first schematic is a simple EQ....
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This circuit calls more Free Running Multivibrator work resemble Flip Flop. Which encourage itself repeatedly. The Q1 and Q2 be Transistor PNP be usable general (2N3906, 2N2907, etc. ) The R1 and R2 limit current that flow through LED the bilateral. If....
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The goal of the project is to create a robot that will follow a black line on a white sheet of paper and solve a maze created out of those materials. The project also included a list of specifications that were to be followed. These specifications are: The....
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Here are 2 heat sensor circuits, first one is build with the 4060 IC, the second one is simpler than the one before and has fewer components. It is an idea....
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To guarantee reliability, the server system designer must consider hot-swap circuit parasitics and the associated transient behavior. The designer should use a TVS (transient voltage suppressor) diode clamp at the line card input. Experimental measurements....
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Build this circuit in any way you want, keep in mind that there is high voltage involved, make sure that everything is properly insulated and that bare conductors are not closer to eachother than 2mm to prevent any arcing. This circuit is basically a voltage....
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The interface depicted below can be used build a serial cable to connect the serial port of the computer to the 16-pin OBD-II connecter found in many cars build in 1996 or later. This interface only supports the ISO 9141-2 / ISO 14230-2 K-line tranfer mode.....
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Your HVsupply will work, but for your own safety and to avoid accidental damage to your circuit if the event you need to troubleshoot with a scope, I strongly encourage the use of an isolation transformer on the 120VAC input. Just a little 1:1 transformer,....
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This article demonstrates basic circuits for pulsing infrared LEDs and low power visible semiconductor lasers using components which are inexpensive and fairly readily available. Many interesting and useful applications can be found in the references cited....
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Capacitance meter is one instrument that you should have in your toolbox if you are an electronics hobbyist, or if you`re a professional electronic technician....
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The following is a (hopefully clear) description of the final version of the trigger used and a circuit diagram for anyone wishing to construct their own. So bear with me while I fumble out some words The initial version of this trigger was a very simple....
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Mobile phone chargers available in the market are quite expensive. The circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs with a rating of 7.2 volts....
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Auto Repair Question Answered for Jeep Grand Cherokee Brake Light Woes...
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This 6" x 18" clock needs 52 light sources. It may one day allow humans to know the time without glasses. For 25 years we searched for clocks big enough to be see without glasses. No large clock existed commercially so our only resort was to have clocks....
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As transformer a toroidal transformer (2x12V 15VA) is used, because this gives much less energy losses then an E-I core transformer as used in the original mains adaptor (for more info, click here )...
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The following circuit shows about Audio Amplifier Mono Circuit Diagram. This circuit based on the LA4555 IC. Features: mono circuit, 2.3 watts ....
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On the circuit diagram below show us a schematic which is used to set the speed of a low-power induction motor, such as those which can be found in fan....
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While cleaning up my computer files I stumbled over this schematic, which I used in the early stage of the USB LED Matrix development, and I thought it might be usefull to others. ..
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As you can see in the circuit diagram this LM317 power supply electronic project require few external components. The input voltage required by this electronic project must be between 8 and 35 volt, and will provide a variable output voltage over a wide....
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PWM pulse width modulation controller board allows 9S12/HCS12 microcontroller or PIC microcontrollers to output 8 channels at 5 DC amps each with current sensing of the PWM waveform. PWM driver circuit for valves, PWM motor driver, solenoids, PWM heaters or....
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How to connect and program the Arduino/Atmega168 microcontroller to LCD display and DS1307 RTC....
-
The Cymbal monoblock power amplifier is a unique and modern push-pull design using ultra-linear 6H30 triodes in a zero-feedback circuit. The uncommon circuit is optimized for sonics rather than raw power. Perfect for efficient drivers and horns, its eight....
-
This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low cost, high flexibility and wide temperature tolerance. At the heart of the circuit is IC TDA2822M. This....
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Even in the simplest of tube microphone circuits, there are different approaches to connecting the microphone capsule to the tube. Let`s use a single-sided microphone capsule as our starting point. The capsule behaves as a variable capacitor, changing its....
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This 7-digit combination lock can be easily hard-wired for any combination that you choose. The circuit uses a 4-bit, divide-by-8 Johnson counter (IC1), ten push button switches and NPN transistor T1. At power-on, ` capacitor C2 connected to pin 15 of IC1....
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SI2171 is a sub package of SI2170, If you need see the description, please click SI2170. If you need SI2171`s datasheet, please download it from below. By Silicon Laboratories ..
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This class of amplifier is designed to follow low level stages, one example is a crystal oscillator. An oscillator for optimum performance can NOT be loaded down, it needs an intermediate stage following. This will then present a sufficiently high enough....
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This is an excellent piece of software. It is very easy and enjoyable to use. It comes with a huge library of symbols and also has a library editor for creating your own. I completed all the drawing before a single joint was soldered. This gave me confidence....
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After the unexpectedly big success of my JFET bass preamp I decided to build an onboard version. For a Jazz Bass-like instrument, I had to get along with three controls, maybe some switches if I used push-pull pots. Further, I wanted the functions of the....
-
Operational amplifiers are undoubtedly the easiest and best way of performing a wide range of linear functions from simple amplification to complex analog computati....
-
The ADF4252 Fractional-N Synthesizer when combined with a VCO and loop Filter forms a complete phased locked loop (PLL). This solution from ADI creates state-of-the-art LO`s (local oscillator) for the upconversion and downconversion of RF signals in Wireless....
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This colorful back led aquarium lights gives natural appearance to the Aquarium tank. The Aquarium Led Lighting circuit automatically turns on at sunset an....
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Here is a 100 Watt inverter circuit using minimum number of components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055 transistors for driving the load. The IC1 Cd4047 wired as an astable multivibrator produces....
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First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on. ..
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Most of the inverters in the market uses modified sinewave for better output at competitive cost. The modified sinewave unit uses a 50% fixed PWM squarewave and the hikes are balanced by a capacitor to produce almost a sine wave. This is called quasi....
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A design example for a portable data acquisition system is offered that greatly simplifies the circuit design task....
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Imagine the Panic situation in the Midnight when an intruder tries to break into the house. This Alarm will help you with its loud Police siren to abort th...
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The excavator is Mitsubishi MS280. The problem is they are not sure how to excite the pump, I want to put an electronic proportional control valve in the old girl. If your familiar with this era of Mitsubishi`s could you let me know and I will give you as....
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The buck converter circuit is the basis for several other similar circuits called forward converters. The buck converter circuit and the input and output voltages for this circuit are shown in Fig. 1. This circuit would be connected directly after the power....
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The LM3875 is an audio amplifier for high power output capable of delivering 56W of continuous average power to a load 8. The performance of the LM3875, utilizing its maximum instantaneous auto temperature ( ° Ke) (Spike ) protection circuitry, places it in....
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This is linear amplifier which need advance knowledge in electronics since the schematic diagram is very complex for hand made circuit. I think you have to re-design the schematic diagram using circuit diagram design software such as diptrace, eagle,....
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This circuit is a monostable multivibrator, or one-shot, made with a 555 timer chip. Click the logic input on the left (the "H"), and the output goes high for a short time, and then it goes low again. A timing interval starts when the trigger input ("tr") is....
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Current to voltage converter circuit can be made using a single resistor, it is very simple since any current will naturally develop a voltage when flow through...
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Is it possible to make an op-amp out of nothing but 555 chips and passive components? Not a terribly practical question, given the existence of very inexpensive and capable op-amps covering every corner of op-amp performance space; but it has some aesthetic....
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This 80M receiver design includes the necessary switching to allow the SSB filter and first I. F. amplifier to be used for transmitting. The receiver stages from R. F. input to speaker output will be described in detail below. This type of band pass filter....
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This circuit bellow shows a teleremote circuit which enables switching ‘on and ‘off of appliances through telephone lines. Can be used ....
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Using the TDA7275A linear integrated circuit manufactured in a minidip plastic package can be designed a very simple speed regulator electronic project that can be used for speed regulation of small DC motors . TDA7275A DC speed controller project is....
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The voltage that control a V/F converters will be displayed if we use a frequency counter, which is directly proportional to the input voltage. A 1 second time...
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The conception of this project is directed to the study of the environment response due to a human action. Based on that subject, an environment was prepared with several visible rays of laser. If one of theses rays is interrupt (eg. someone crosses it), an....
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It is easy to install 6E5 on the place of oscillator tube because socket`s pinout of this amazing valve is nearly the same to pinout of common 6J5 and 6C5 triodes. So, you can replace these tubes with The Magic Eye without any soldering. But if you want to....
Here's the schematic for my Bee Counter test board with the functional units labeled to make them easier to discuss. This test board has the same circuitry as the larger board, but with only 4 gates instead of 44 to save a TON of time and money debugging....
Alkaline Battery Charger, Battery Charger , This circuit was specifically designed to recharge alkaline cells. The unusual connection of the transistor in each charging unit will cause it to osci...
A very stable and simple FM transmitter circuit is given here. With a matching antenna, this transmitter can attain a range of around 200 meters. I assembled this transmitter few years and got very good results. Let us see how the circuit works. A condenser....
Pentode is astable phantastron during radar search, and d-c amplifier during lock-on when pentode furnishes direct control of klystron repeller. -NBS, "Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, " Vol. 1, Electron Tube circuits,....
Here is very simple circuit in which the LED becomes ON only after a preset time the power supply is switched ON. When the power supply is switched on the transistor will be OFF. The capacitor now charges via the preset R3 and when the voltage across C1 is....
This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, Analog Multiplier, Multiplier Circuit, log-antilog circuit, analog multiplication, controlled gain amplifier, summing junction,....
The following circuit shows about Line Follower Sensor Circuit Diagram. Features:Simple circuit, Infra-Red LEDs D1 and D2 will emit Infra-Red ....
The H-bridge: The H-bridge is a commonly known, and commonly used way to drive a brushed DC motor. It allows for simple forward/reverse drive, ....
Modification of the Icom IC-718 Transceiver for ALE, to de-activate the transmit bandpass relays during receive and scanning....
The circuit was designed based on the operation of Siemens UAA180 as it functions as a LED driver for light band displays for measuring the level of audio signals...
A couple of few years ago I had build a diode-sensor based RF powermeter using a 68HC11 microprocessor. Even before that I had build an analog RF powermeter with thermal power sensor. And I found datasheets of logarithmic amplifiers very interesting, that....
Producing and manipulating the sine wave function is a com- mon problem encountered by circuit designers. Sine wave circuits pose a significant design challenge because they rep- resent a constantly controlled linear Oscillator Sine wave circuitry is....
The LM317T is a adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1. 5 amps over an output range of 1. 25 to 37 volts. The device also has built in current limiting and thermal shutdown which makes it essentially blow-out....
The AN12974A Audio Power Amplifier features built-in AGC circuitry and Spatializer environ, . , The Spatializer environ, is Desper Products, Inc. `s exclusive signal processing technology that is able to generate surround sound for low-power mobile....
This is Infra-Red Remote Control Tester circuit. This circuit is used to test go/no-go of any remote control transmitting infra-red (IR) light. The supply of this circuit is 3V battery. This circuit has some advantages, such as fits in a compact enclosure,....
This project uses a small, common electret microphone to convert audio to an electrical signal. These are the cheap microphones found in most PC headsets. The microphone output must be amplified and zeroed before it can be recorded with the MSP430. This is....
can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5 minute intervals within the hour. 4 additional LEDs are used to indicate 1 to 4 minutes of time..
The Intelligent Fan Controller will control the speed of computer fans based on the temperature inside your computer and reduce the noise made by your computer Intelligent Fan Controller 4-wire 2-wire 3-wire speed computer pic microchip PIC18F2550 18F2550....
Field strength meter circuit is a very useful device for measuring the RF output of any transmitter or experimenting different antennas with the transmitter. The work of the field strength meter (FSM) is simple it converts RF energy in to DC voltage and this....
This article provides a detailed description of our methodology for testing power supplies in three major parts. The first one lists PSU parameters we check out and specifies the test conditions. In the second section you`ll find terms often voiced by PSU....
An almost identical recreation of the SAP-1 Simple As Possible microprocessor, as published in Digital Computer Electronics by Albert Malvino and Jerald Brown. While the book is out of print an "ebook" can be found fairly easily if you know where to look. I....
We select the so called phase shift oscillator as a first example as it exemplifies verysimply the principles set forth in the previous blog post. The circuit is drawn to show clearly the amplifier and feedback network. The circuit consists of a common....
Many tools can be used with a musical instrument to produce various sound effects and the simplest form is the repetition of tone or a method often called echo . Such equipment to create one more turn on the music that you hear. Circuit diagram is for....
Starting from today I will try to post interesting Arduino projects from around the web. I am novice in this domain but I am giving my best to fully understant it. I must say from the begining that the projects are not developed by me and I will link the....
This is a design circuit for audio graphic equalizers, that are very common as commercial products but circuits for them are very rarely published. This circuit is a simple design circuit. The circuit is need an op-amp for amplifying the input signal. This....
By using a simple visual indicating system, this small transistor tester allows you to run a quick go/non-go` check on NPN as well as PNP transistors. If the device under test is a working NPN then the green LED (D1) will‚ash, while the red counterpart....
Inverter or ondulator, is an electronic circuit used to turn direct current (DC) into alternating current (AC). The function of an inverter is to change the voltage of entry of direct current (it normally comes from a battery of 12 or 24 Vdc) to an alternate....
This circuit above uses a 13 volt zener diode, D2 which provides the voltage regulation. Aprroximately 0. 7 Volts are dropped across the transistors b-e junction, leaving a higher current 12. 3 Volt output supply. This circuit can supply loads of up to 500....
This smoke detector circuit diagram is based on the SD2 CMOS Photo-Electric Smoke Detector Integrated Circuit manufactured by Supertex INC and include almost all needed components to build a very simple and high efficiency smoke detector project. The LED....
You can use a humidity sensor to give an alert of boat leakage, or when your books start being flooded by heavy rain attack on your broken roof, or anything you...
The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep After....
This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect and disconnect) the switch depending on the sound input. The output switch of this circuit is act by a relay...
New applications for DC voltage converters, such as the workhorse` LT1070, arise every day. These converters can be adapted to nearly every imaginable ratio of input and output voltages. However, all of these circuits and devices have the same shortcoming,....
This triac-based 220V AC motor speed controller circuit is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the....
Taking inspiration from the good folks at Nanode and an Instructable I saw recently, I`ve come up with another AVR based Ethernet board that can be programmed and used like an Arduino. It`s a simple design based on the ATMega and Microchip`s ENC28J60....
A 20 Band EQ for my 900Watt MOSFET Power Amplifier. The Output Level would drop by the Ammount of resistors, so for 2 Equal Resistors, I should amplify it by a gainof 3. Would that propably work Eek, that is very confusing. The first schematic is a simple EQ....
This circuit calls more Free Running Multivibrator work resemble Flip Flop. Which encourage itself repeatedly. The Q1 and Q2 be Transistor PNP be usable general (2N3906, 2N2907, etc. ) The R1 and R2 limit current that flow through LED the bilateral. If....
The goal of the project is to create a robot that will follow a black line on a white sheet of paper and solve a maze created out of those materials. The project also included a list of specifications that were to be followed. These specifications are: The....
Here are 2 heat sensor circuits, first one is build with the 4060 IC, the second one is simpler than the one before and has fewer components. It is an idea....
To guarantee reliability, the server system designer must consider hot-swap circuit parasitics and the associated transient behavior. The designer should use a TVS (transient voltage suppressor) diode clamp at the line card input. Experimental measurements....
Build this circuit in any way you want, keep in mind that there is high voltage involved, make sure that everything is properly insulated and that bare conductors are not closer to eachother than 2mm to prevent any arcing. This circuit is basically a voltage....
The interface depicted below can be used build a serial cable to connect the serial port of the computer to the 16-pin OBD-II connecter found in many cars build in 1996 or later. This interface only supports the ISO 9141-2 / ISO 14230-2 K-line tranfer mode.....
Your HVsupply will work, but for your own safety and to avoid accidental damage to your circuit if the event you need to troubleshoot with a scope, I strongly encourage the use of an isolation transformer on the 120VAC input. Just a little 1:1 transformer,....
This article demonstrates basic circuits for pulsing infrared LEDs and low power visible semiconductor lasers using components which are inexpensive and fairly readily available. Many interesting and useful applications can be found in the references cited....
Capacitance meter is one instrument that you should have in your toolbox if you are an electronics hobbyist, or if you`re a professional electronic technician....
The following is a (hopefully clear) description of the final version of the trigger used and a circuit diagram for anyone wishing to construct their own. So bear with me while I fumble out some words The initial version of this trigger was a very simple....
Mobile phone chargers available in the market are quite expensive. The circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs with a rating of 7.2 volts....
Auto Repair Question Answered for Jeep Grand Cherokee Brake Light Woes...
This 6" x 18" clock needs 52 light sources. It may one day allow humans to know the time without glasses. For 25 years we searched for clocks big enough to be see without glasses. No large clock existed commercially so our only resort was to have clocks....
As transformer a toroidal transformer (2x12V 15VA) is used, because this gives much less energy losses then an E-I core transformer as used in the original mains adaptor (for more info, click here )...
The following circuit shows about Audio Amplifier Mono Circuit Diagram. This circuit based on the LA4555 IC. Features: mono circuit, 2.3 watts ....
On the circuit diagram below show us a schematic which is used to set the speed of a low-power induction motor, such as those which can be found in fan....
While cleaning up my computer files I stumbled over this schematic, which I used in the early stage of the USB LED Matrix development, and I thought it might be usefull to others. ..
As you can see in the circuit diagram this LM317 power supply electronic project require few external components. The input voltage required by this electronic project must be between 8 and 35 volt, and will provide a variable output voltage over a wide....
PWM pulse width modulation controller board allows 9S12/HCS12 microcontroller or PIC microcontrollers to output 8 channels at 5 DC amps each with current sensing of the PWM waveform. PWM driver circuit for valves, PWM motor driver, solenoids, PWM heaters or....
How to connect and program the Arduino/Atmega168 microcontroller to LCD display and DS1307 RTC....
The Cymbal monoblock power amplifier is a unique and modern push-pull design using ultra-linear 6H30 triodes in a zero-feedback circuit. The uncommon circuit is optimized for sonics rather than raw power. Perfect for efficient drivers and horns, its eight....
This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low cost, high flexibility and wide temperature tolerance. At the heart of the circuit is IC TDA2822M. This....
Even in the simplest of tube microphone circuits, there are different approaches to connecting the microphone capsule to the tube. Let`s use a single-sided microphone capsule as our starting point. The capsule behaves as a variable capacitor, changing its....
This 7-digit combination lock can be easily hard-wired for any combination that you choose. The circuit uses a 4-bit, divide-by-8 Johnson counter (IC1), ten push button switches and NPN transistor T1. At power-on, ` capacitor C2 connected to pin 15 of IC1....
SI2171 is a sub package of SI2170, If you need see the description, please click SI2170. If you need SI2171`s datasheet, please download it from below. By Silicon Laboratories ..
This class of amplifier is designed to follow low level stages, one example is a crystal oscillator. An oscillator for optimum performance can NOT be loaded down, it needs an intermediate stage following. This will then present a sufficiently high enough....
This is an excellent piece of software. It is very easy and enjoyable to use. It comes with a huge library of symbols and also has a library editor for creating your own. I completed all the drawing before a single joint was soldered. This gave me confidence....
After the unexpectedly big success of my JFET bass preamp I decided to build an onboard version. For a Jazz Bass-like instrument, I had to get along with three controls, maybe some switches if I used push-pull pots. Further, I wanted the functions of the....
Operational amplifiers are undoubtedly the easiest and best way of performing a wide range of linear functions from simple amplification to complex analog computati....
The ADF4252 Fractional-N Synthesizer when combined with a VCO and loop Filter forms a complete phased locked loop (PLL). This solution from ADI creates state-of-the-art LO`s (local oscillator) for the upconversion and downconversion of RF signals in Wireless....
This colorful back led aquarium lights gives natural appearance to the Aquarium tank. The Aquarium Led Lighting circuit automatically turns on at sunset an....
Here is a 100 Watt inverter circuit using minimum number of components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055 transistors for driving the load. The IC1 Cd4047 wired as an astable multivibrator produces....
First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on. ..
Most of the inverters in the market uses modified sinewave for better output at competitive cost. The modified sinewave unit uses a 50% fixed PWM squarewave and the hikes are balanced by a capacitor to produce almost a sine wave. This is called quasi....
A design example for a portable data acquisition system is offered that greatly simplifies the circuit design task....
Imagine the Panic situation in the Midnight when an intruder tries to break into the house. This Alarm will help you with its loud Police siren to abort th...
The excavator is Mitsubishi MS280. The problem is they are not sure how to excite the pump, I want to put an electronic proportional control valve in the old girl. If your familiar with this era of Mitsubishi`s could you let me know and I will give you as....
The buck converter circuit is the basis for several other similar circuits called forward converters. The buck converter circuit and the input and output voltages for this circuit are shown in Fig. 1. This circuit would be connected directly after the power....
The LM3875 is an audio amplifier for high power output capable of delivering 56W of continuous average power to a load 8. The performance of the LM3875, utilizing its maximum instantaneous auto temperature ( ° Ke) (Spike ) protection circuitry, places it in....
This is linear amplifier which need advance knowledge in electronics since the schematic diagram is very complex for hand made circuit. I think you have to re-design the schematic diagram using circuit diagram design software such as diptrace, eagle,....
This circuit is a monostable multivibrator, or one-shot, made with a 555 timer chip. Click the logic input on the left (the "H"), and the output goes high for a short time, and then it goes low again. A timing interval starts when the trigger input ("tr") is....
Current to voltage converter circuit can be made using a single resistor, it is very simple since any current will naturally develop a voltage when flow through...
Is it possible to make an op-amp out of nothing but 555 chips and passive components? Not a terribly practical question, given the existence of very inexpensive and capable op-amps covering every corner of op-amp performance space; but it has some aesthetic....
This 80M receiver design includes the necessary switching to allow the SSB filter and first I. F. amplifier to be used for transmitting. The receiver stages from R. F. input to speaker output will be described in detail below. This type of band pass filter....
This circuit bellow shows a teleremote circuit which enables switching ‘on and ‘off of appliances through telephone lines. Can be used ....
Using the TDA7275A linear integrated circuit manufactured in a minidip plastic package can be designed a very simple speed regulator electronic project that can be used for speed regulation of small DC motors . TDA7275A DC speed controller project is....
The voltage that control a V/F converters will be displayed if we use a frequency counter, which is directly proportional to the input voltage. A 1 second time...
The conception of this project is directed to the study of the environment response due to a human action. Based on that subject, an environment was prepared with several visible rays of laser. If one of theses rays is interrupt (eg. someone crosses it), an....
It is easy to install 6E5 on the place of oscillator tube because socket`s pinout of this amazing valve is nearly the same to pinout of common 6J5 and 6C5 triodes. So, you can replace these tubes with The Magic Eye without any soldering. But if you want to....
