New Circuits Page 45
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The AVR Basic Infrared Transmitter is a sister project for the Basic Infrared Reciever. The emphasis here is on "basic" because the simplest version can be built using only 10 discrete components and a typical AVR microcontroller. Taken together, these two....
-
-
This is a circuit about PLL system that can be used to implement an FM demodulator. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal.....
-
LM4880 is a dual audio HiFi amplifier IC from National Semiconductor. This headphone amplifier circuitis specifically designed to produce high quality audio output with a minimum amount of components. LM4880 integrated circuit capable of delivering 250mW per....
-
-
This is a quick DIY electronics project I set for myself so I could brush up on my circuit design and some building techniques. I bought a couple copper lanterns off ebay and fitted them with a circuit similar to the outdoor solar lights you can buy for your....
-
The three-tone electronic doorbell circuit consists of the coding triggered circuit, multi-tone generator and audio amplifier circuit, and it is shown in Figure 3-110. Coding trigger circuit is composed of the buttons Sl-S6, two four-input AND gate (DI, D2)....
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-
-
This circuit is designed to operate an electrical door-release mechanism - but it will have other applications. When you enter the four-digit code of your choice - the relay will energize for a preset time period. Use the relay contacts to power the release....
-
-
The following circuit shows about TL084 IC Dynamo Current Voltage Regulator Fuse Box Diagram. Features: the complete control circuit will ....
-
To produce a modification that provides automated locking of the Scorpios central locking system upon a preset speed threshold. This provides increased security and safety. Various methods are available to calculate the velocity of an object; here we only....
-
-
A simple transformerless power supply circuit with diagram and schematics that gives 5 volts dc output.This is a low cost,low current power supply circuit suitable for simple applications like power an LED....
-
This solid-state push-pull single-ended Class A circuit is capable of providing a sound comparable to those valve amplifiers, delivering more output power (6.9W measured across a 8 Ohm loudspeaker cabinet load), less THD, higher input sensitivity and better....
-
-
The 8-bit 2x1 multiplexer consists of 16 tristate buffers and a static inverter. It is designed so that when the select bit is low, 8 of the input bits are sent through tristate buffers to the 8 output bits, and when the select bit is high, the other 8 input....
-
Capacitors are one of the major electronic components which come under the passive component family. These are extensively used in lectronic circuits and virtually no circuit can be built without involving these important parts. The basic function of a....
-
I`ve built this circuit with two LT1001 s and the output of the OP-AMP saturates to +5V. I used +5V and GND for the supplies. In the page, it says that if +1V is applied to the "Servo Input", the output of the DUT will be +1V. I can understand that since the....
-
-
An interface circuit based on optocouplers provides galvanic isolation and common-mode noise rejection between low-voltage microcontroller units and high-voltage integrated power modules in motor-drive applications. Optocouplers provide high-voltage....
-
Displays are always nice. So far I`ve just been demonstrating how to use 7-segmented displays to display numbers using very few resources. But what if you want to display text Or pictures Or both Well in order to do that, you`re going to need a simple LCD....
-
Also known as the stairstep-ramp , or simply counter A/D converter, this is also fairly easy to understand but unfortunately suffers from several....
-
This allows up to 8 analogue inputs (with a range from 0 to 5 volts) to produce selectable MIDI control output commands. The analogue inputs could be rotary or slider potentiometers which are connected to 0 to 5 volts. Also the inputs could be connected to....
-
Mercury, Oldsmobile, Plymouth and Pontiac cars, muscle cars and antique Classic Car Wiring is constantly adding available diagrams to this site. Here is the wiring diagram Porsche 911L engine for the 1968th car model This pattern has already changed since....
-
This page lists a few transistor circuits not found on other pages because no topic exists. However the circuits do serve to make some specific point, but do not come with a description. An example of an RF amplifier circuit using a transistor is shown....
-
Dynamic microphones are versatile and ideal for general-purpose use. They use a simple design with few moving parts. They are relatively sturdy and resilient to rough handling. They are also better suited to handling high volume levels, such as from certain....
-
This small transmitter can arrive the more than 1 km in favorable conditions of emission. The modulation can be made so much with a microphone, for an electrets microphone, or other audio source. The 5 turns of enameled thread 22 AWG, with diameter of 1 cm....
-
-
Here is the circuit diagram of a low voltage /low power DC motor speed controller based on the IC TDA 7274 from ST Microelectronics. The IC TDA 7274 is a monolithic integrated DC motor speed controller intended for low voltage/ low power applications. Built....
-
SA9618A CAN be used for ALPC and signal conversion between CD optical pickup and decoding chip. This IC incorporates an interconnection to general CD optical pickup Photodiode bias voltage VREF generation circuit, RF Amplifier and ALPC circuit. (This IC is....
-
More and more serial bus systems are preferred instead of a parallel bus, because of the simpler wiring. As the efficiency of serial buses increases, the speed advantage of the parallel data transmission gets less important. The clock frequencies of SPI....
-
The Flash-based program memory is where the program sketch is stored after an upload. The SRAM act as the main memory where program variables are temporarily stored as the sketch executes. The system clock synchronizes the internal operation of the CPU and....
-
Has any one tried colliding two High Voltage potentials in a Grey Tube? Wiring two (identical)....
-
-
A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer....
-
Incorporates heavy degenerative feedback in which small lamp is nonlinear compensating resistance. Provides constant output frequency and voltage for any supply between 12 and 32 V, at temperatures down to -20 °F. Frequency is determined by capacitors C and....
-
-
The simplest method of detecting metal is by beat frequency oscillator. The circuit basically consists of two balanced oscillator. One acts as the detector element, the other provides the reference signal. This oscillator frequency reference is set to fix....
-
In recent years, following CD`s introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for cheap....
-
-
Here is solar tracking circuit. This circuit is a power generating method from sunlight. This circuit need only maximum sunlight to generate power. This project...
-
A schematic diagram of the remote-control receiver is shown. The heart of the circuit is IC1, a PIC16C54 8-bit CMOS manufactured by Microchip. The microcontroller stores its data in IC2, a 93LC46 1-kbit serial EEPROM (electrically erasable programmable....
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The transmission distance can be increased greatly by replacing the transmitter`s red LED with a cheap red laser diode purchased from a $2 Dollar Shop . The circuit design makes a compromise between laser brightness and sound quality and loudness. This is....
-
Light your table top with this cool White LED Lamp. It is powered from the USB port and is ideal to take notes while browsing internet. The USB port can pr....
-
Greeting, This post summarize the work of switching power supply schematic diagram experts who are completely familiar with all the aspects of....
-
The 0. 5" force sensitive resistor (FSR) is a quick way to measure pressure, and is very easy to setup. The FSR varies its resistance depending on how much pressure is applied to the sensing area. The greater the force, the lower the resistance. When....
-
Security system sensors such as motion detectors, reed switches, pressure mats, glass-break detectors, infra-red beams, and conductive film can be very handy for all sorts of things including home automation systems, interactive art installations and....
-
I built this circuit and for some reason it works. FYI, the diodes are red 5mm LED`s, the transistor is 3904 NPN, and the resistors are what are shown in the schematic. Logically it should not work when you press the PBNO. The red 5mm diodes should be....
-
The simplest way to bias a transistor amplifier is by the fixed-bias circuit. The supply voltage is connected to the transistor`s base terminal trough the R1 current limiting resistor. The value of the bias resistor is usually selected based on the....
-
Most of the source code of this project its based on my Telecard reader projectof my web site. The components for this project arefew and ordinary, thatmeans low-cost and easy-to-be-found. The "keys" are empty or not telecards (Phone cards. Not cell phone....
-
-
I bought a solar powered garden light. The solar panel charges the batteries and when it gets dark the lights (3x LEDs) turn on until it either gets lights again or the batteries run out. First, the batteries. The control box houses the batteries, which are....
-
The FET amplifier, for those focused on the tube sound, which for various reasons can not be made after the courage to Jiang Sheng-class enthusiasts. bipolar FET tube amplifier and the output characteristics very similar, the frequency characteristics of a....
-
sir, we are very much interested in design of jammer circuit, even we started working on it but there is some problem with our circuit i.e signal is not getting jamm....
-
This is a simple transistor-based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It`s designed to be used with the usual types of normally-closed input devices such as -....
-
A simple audio level meter or a Volume unit VU level meter circuit with diagram and schematic. This sound level meter is designed using transistors with a flat frequency response in the range of 20Hz to 50Khz....
-
An amp that uses 211 or 845. It puts out just over 40 watts. The tube must run in A2 to get this power, which is not a problem with a good driver. The secret is a good follower, you use a 6BQ5, I use a mosfet. You use 7K ohm load on 1000 volts, I use 10K ohm....
-
Stepper motors are useful for relatively low-speed, intermediate-torque drive and positioning applications, particularly where accurate sub-revolution rotor position control is necessary. Motors of this type are commonly used to drive the reels on....
-
-
-
The figures above shows the basic idea of any robot, where we have some inputs and output devices connected to the brain and some outputs controlled b....
-
-
Continuous monitoring of the mains voltage is required in many applications such as manual voltage stabilisers and motor pumps. An analogue voltmeter, though cheap, has many disadvantages as it has moving parts and is sensitive to vibrations. The solidstate....
-
Hi all, I completed my first amp a few months ago. It was more a test than really something to listen to. It used the 9240/240 Mosfets. Now I want to....
-
-
-
-
The IN914 (little glassy diode) and the zener diodes all have bands on the body which must be put in the direction shown on the drawing. The bands ar ` e at the K end of the diodes. A magnifying glass will help to locate the bands and also to check the....
-
-
This project will indicate the volume level of the audio going to your speakers by lighting up LEDS. The LEDS can be any color so mix them up and really make it look good. The input of the circuit is connected to the speaker output of your audio amplifier.....
-
-
The SN754410 Dual Motor Control circuit can be seen below. It is just about as simple as it looks with the PIC being the central processor. The main parts used and seen in the schematic below are the 7805, 18F452 and SN754410. The LM7805 +5v Regulator is....
-
This handy little circuit can tell the difference between darkness and light, making it very useful for switching on and off signs, porch lights or other things when it gets dark or light...
-
This circuit is similar to the one above but uses positive feedback to get a little more amplitude to the speaker. I copied it from a small 5 transistor radio that uses a 25 ohm speaker. In the circuit above, the load resistor for the driver transistor is....
-
We`ve already seen one example of a monostable multivibrator in use: the pulse detector used within the circuitry of flip-flops, to enable the latch portion for a brief time when the clock input signal transitions from either low to high or high to low. The....
-
This article describes how to build a simple inductance meter. The PCB layout is included....
-
-
At first glance this circuit looks fairly complex, but when broken down, can be divided into high pass and low pass filter sections followed by a summing amplifier with a gain of around 20 times. Supply rail voltage is +/- 9V DC. The controls may also be....
-
This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days....
-
This easyelectronicbuzzercircuitbuilt based on timer works for gaining the frequency. The IC timer NE555 used as astable multivibrator operating at about 1kHz and produces a sound when switched on. The sound frequency can be adjusted by varying the 10K....
-
FM Radio project detailed here is based on SONY 1619 chip. This is single chip radio means, everything from Antenna to Speaker is done by Sony IC, specially designed for AM/FM Radios. Radio is designed on a double sided PTH Board and works on USB power.....
-
Although the Audionics CC-2 is named after Cliff Moulton (Audionics` chief engineer) and Charles Wood (Prez of Audionics), as usual in the business world, the principals in the company masked the identity of the real creator - Bob Sickler, whose name appears....
-
If a strip of conductive metal is stretched, it will become skinnier and longer, both changes resulting in an increase of electrical resistance end-to-end. Conversely, if a strip of conductive metal is placed under compressive force (without buckling), it....
-
LCD comes in various configurations and the most popular one is 16x2 matrix display. This article shows the interfacing of ATmega16 with LCD by displaying a simple character on the LCD. In this project LCD is working in 8-bit mode i. e. , the data....
-
Daily switching power supply, mainly offer the direct current power supply for electronic device and supply power. The required direct-current volts of the electronic device, ranges are generally all between several volts and more than ten volts, and the....
-
This Bat Detector Circuit is authored by Chris Eve. Basic tests with a variety of salvaged electret microphones all showed good response to 50kHz and beyond, the smaller the unit the better the response. My tests indicate that a small electret microphone has....
-
-
Before getting started an acknowledgement is due, the circuit presented here uses an ingenious method of controlling a flyback converter by the voltage developed on a cur-rent sensing resistor, this was published by Andrew Armstrong in the July 1992 issue of....
-
Here the circuit diagram of Lantern dimmer/flasher designed by Tony Van Roon: Electronic parts List: R1 = 100K R2 = 100K R3 = 100K R4 = 100K R5 = 3K9 R6 = 3K9 R7 = 470 R8 = 100 R9 = 220, 1/2 watt P1 = 5K C1, C3 = 10uF/16V C2 = 0. 01uF, ceramic T1. This....
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A car battery deteriorates in use and its life seldom exceeds four years. When new, its voltage may drop to only 2V while cranking the engine. As the battery ages, its internal impedance increases and so the voltage drop while cranking also increases, until....
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The circuit being very simple, this project can be used as a first NXT hardware hack. A white LED (D1) is powered through a 150 ohm resistor (R1) by the 4. 3V NXT power supply. The threshold of white LEDs is about 3. 5V, so the current in the resistor will....
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This circuit is a Mosfet-based linear voltage regulator with a voltage drop of as low as 60mV at 1A. The circuit uses a 15V-0-15V transformer and employs an IRF540 N-channel Mosfet (Q1) to deliver the regulated 12V output. The gate drive voltage required for....
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Here is the circuit diagram of a 5V transformer less power supply using minimum components. The working of this circuit is quite simple. Resistor R1 does the job of current limiting and bridge D1 rectifies the mains voltage. The Zener diode regulates the....
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Some of you might wonder why a charger is needed at all, to charge a 12 Volt battery from a 12 Volt source! Well, firstly the "12 Volt" source will typically vary anywhere from 11 Volt to 15 Volt, and then a battery needs a controlled charge current and....
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The TPS6420x controller is designed to operate from one to three series-connected cells or from a 3. 3 V or 5 V supply obtained from a USB port. At its output it can produce 3. 3 V at 2 A, suitable for powering a microcontroller-based system. With a suitable....
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Detector Components & Infrared Motion Work, Electronic Circuit Schematic Wiring Diagram, Detector Components & Infrared Motion Work...
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This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores. The 1K resistors in the circuit are essential so that the....
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This simple circuit helps you sniff out RF radiation leaking from your transmitter, improper joints, a broken cable or equipment with poor RF shielding. The tester is designed for the 2-m amateur radio band (144-146 MHz in Europe). The instrument has a....
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How to control Christmas Light Displays with a Computer...
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Hi everybody. I need H-bridge schematic for 230V 50Hz output from DC 350V, using 555 timer IC and mosfets....
![Project [E-20] Infrared Data Transmitter](uploads/62/keypad_subcircuit.gif "Project [E-20] Infrared Data Transmitter")
The AVR Basic Infrared Transmitter is a sister project for the Basic Infrared Reciever. The emphasis here is on "basic" because the simplest version can be built using only 10 discrete components and a typical AVR microcontroller. Taken together, these two....
This is a circuit about PLL system that can be used to implement an FM demodulator. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal.....
LM4880 is a dual audio HiFi amplifier IC from National Semiconductor. This headphone amplifier circuitis specifically designed to produce high quality audio output with a minimum amount of components. LM4880 integrated circuit capable of delivering 250mW per....
This is a quick DIY electronics project I set for myself so I could brush up on my circuit design and some building techniques. I bought a couple copper lanterns off ebay and fitted them with a circuit similar to the outdoor solar lights you can buy for your....
The three-tone electronic doorbell circuit consists of the coding triggered circuit, multi-tone generator and audio amplifier circuit, and it is shown in Figure 3-110. Coding trigger circuit is composed of the buttons Sl-S6, two four-input AND gate (DI, D2)....
This circuit is designed to operate an electrical door-release mechanism - but it will have other applications. When you enter the four-digit code of your choice - the relay will energize for a preset time period. Use the relay contacts to power the release....
The following circuit shows about TL084 IC Dynamo Current Voltage Regulator Fuse Box Diagram. Features: the complete control circuit will ....
To produce a modification that provides automated locking of the Scorpios central locking system upon a preset speed threshold. This provides increased security and safety. Various methods are available to calculate the velocity of an object; here we only....
A simple transformerless power supply circuit with diagram and schematics that gives 5 volts dc output.This is a low cost,low current power supply circuit suitable for simple applications like power an LED....
This solid-state push-pull single-ended Class A circuit is capable of providing a sound comparable to those valve amplifiers, delivering more output power (6.9W measured across a 8 Ohm loudspeaker cabinet load), less THD, higher input sensitivity and better....
The 8-bit 2x1 multiplexer consists of 16 tristate buffers and a static inverter. It is designed so that when the select bit is low, 8 of the input bits are sent through tristate buffers to the 8 output bits, and when the select bit is high, the other 8 input....
Capacitors are one of the major electronic components which come under the passive component family. These are extensively used in lectronic circuits and virtually no circuit can be built without involving these important parts. The basic function of a....
I`ve built this circuit with two LT1001 s and the output of the OP-AMP saturates to +5V. I used +5V and GND for the supplies. In the page, it says that if +1V is applied to the "Servo Input", the output of the DUT will be +1V. I can understand that since the....
An interface circuit based on optocouplers provides galvanic isolation and common-mode noise rejection between low-voltage microcontroller units and high-voltage integrated power modules in motor-drive applications. Optocouplers provide high-voltage....
Displays are always nice. So far I`ve just been demonstrating how to use 7-segmented displays to display numbers using very few resources. But what if you want to display text Or pictures Or both Well in order to do that, you`re going to need a simple LCD....
Also known as the stairstep-ramp , or simply counter A/D converter, this is also fairly easy to understand but unfortunately suffers from several....
This allows up to 8 analogue inputs (with a range from 0 to 5 volts) to produce selectable MIDI control output commands. The analogue inputs could be rotary or slider potentiometers which are connected to 0 to 5 volts. Also the inputs could be connected to....
Mercury, Oldsmobile, Plymouth and Pontiac cars, muscle cars and antique Classic Car Wiring is constantly adding available diagrams to this site. Here is the wiring diagram Porsche 911L engine for the 1968th car model This pattern has already changed since....
This page lists a few transistor circuits not found on other pages because no topic exists. However the circuits do serve to make some specific point, but do not come with a description. An example of an RF amplifier circuit using a transistor is shown....
Dynamic microphones are versatile and ideal for general-purpose use. They use a simple design with few moving parts. They are relatively sturdy and resilient to rough handling. They are also better suited to handling high volume levels, such as from certain....
This small transmitter can arrive the more than 1 km in favorable conditions of emission. The modulation can be made so much with a microphone, for an electrets microphone, or other audio source. The 5 turns of enameled thread 22 AWG, with diameter of 1 cm....
Here is the circuit diagram of a low voltage /low power DC motor speed controller based on the IC TDA 7274 from ST Microelectronics. The IC TDA 7274 is a monolithic integrated DC motor speed controller intended for low voltage/ low power applications. Built....
SA9618A CAN be used for ALPC and signal conversion between CD optical pickup and decoding chip. This IC incorporates an interconnection to general CD optical pickup Photodiode bias voltage VREF generation circuit, RF Amplifier and ALPC circuit. (This IC is....
More and more serial bus systems are preferred instead of a parallel bus, because of the simpler wiring. As the efficiency of serial buses increases, the speed advantage of the parallel data transmission gets less important. The clock frequencies of SPI....
The Flash-based program memory is where the program sketch is stored after an upload. The SRAM act as the main memory where program variables are temporarily stored as the sketch executes. The system clock synchronizes the internal operation of the CPU and....
Has any one tried colliding two High Voltage potentials in a Grey Tube? Wiring two (identical)....
A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer....
Incorporates heavy degenerative feedback in which small lamp is nonlinear compensating resistance. Provides constant output frequency and voltage for any supply between 12 and 32 V, at temperatures down to -20 °F. Frequency is determined by capacitors C and....
The simplest method of detecting metal is by beat frequency oscillator. The circuit basically consists of two balanced oscillator. One acts as the detector element, the other provides the reference signal. This oscillator frequency reference is set to fix....
In recent years, following CD`s introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for cheap....
Here is solar tracking circuit. This circuit is a power generating method from sunlight. This circuit need only maximum sunlight to generate power. This project...
A schematic diagram of the remote-control receiver is shown. The heart of the circuit is IC1, a PIC16C54 8-bit CMOS manufactured by Microchip. The microcontroller stores its data in IC2, a 93LC46 1-kbit serial EEPROM (electrically erasable programmable....
The transmission distance can be increased greatly by replacing the transmitter`s red LED with a cheap red laser diode purchased from a $2 Dollar Shop . The circuit design makes a compromise between laser brightness and sound quality and loudness. This is....
Light your table top with this cool White LED Lamp. It is powered from the USB port and is ideal to take notes while browsing internet. The USB port can pr....
Greeting, This post summarize the work of switching power supply schematic diagram experts who are completely familiar with all the aspects of....
The 0. 5" force sensitive resistor (FSR) is a quick way to measure pressure, and is very easy to setup. The FSR varies its resistance depending on how much pressure is applied to the sensing area. The greater the force, the lower the resistance. When....
Security system sensors such as motion detectors, reed switches, pressure mats, glass-break detectors, infra-red beams, and conductive film can be very handy for all sorts of things including home automation systems, interactive art installations and....
I built this circuit and for some reason it works. FYI, the diodes are red 5mm LED`s, the transistor is 3904 NPN, and the resistors are what are shown in the schematic. Logically it should not work when you press the PBNO. The red 5mm diodes should be....
The simplest way to bias a transistor amplifier is by the fixed-bias circuit. The supply voltage is connected to the transistor`s base terminal trough the R1 current limiting resistor. The value of the bias resistor is usually selected based on the....
Most of the source code of this project its based on my Telecard reader projectof my web site. The components for this project arefew and ordinary, thatmeans low-cost and easy-to-be-found. The "keys" are empty or not telecards (Phone cards. Not cell phone....
I bought a solar powered garden light. The solar panel charges the batteries and when it gets dark the lights (3x LEDs) turn on until it either gets lights again or the batteries run out. First, the batteries. The control box houses the batteries, which are....
The FET amplifier, for those focused on the tube sound, which for various reasons can not be made after the courage to Jiang Sheng-class enthusiasts. bipolar FET tube amplifier and the output characteristics very similar, the frequency characteristics of a....
sir, we are very much interested in design of jammer circuit, even we started working on it but there is some problem with our circuit i.e signal is not getting jamm....
This is a simple transistor-based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It`s designed to be used with the usual types of normally-closed input devices such as -....
A simple audio level meter or a Volume unit VU level meter circuit with diagram and schematic. This sound level meter is designed using transistors with a flat frequency response in the range of 20Hz to 50Khz....
An amp that uses 211 or 845. It puts out just over 40 watts. The tube must run in A2 to get this power, which is not a problem with a good driver. The secret is a good follower, you use a 6BQ5, I use a mosfet. You use 7K ohm load on 1000 volts, I use 10K ohm....
Stepper motors are useful for relatively low-speed, intermediate-torque drive and positioning applications, particularly where accurate sub-revolution rotor position control is necessary. Motors of this type are commonly used to drive the reels on....
The figures above shows the basic idea of any robot, where we have some inputs and output devices connected to the brain and some outputs controlled b....
Continuous monitoring of the mains voltage is required in many applications such as manual voltage stabilisers and motor pumps. An analogue voltmeter, though cheap, has many disadvantages as it has moving parts and is sensitive to vibrations. The solidstate....
Hi all, I completed my first amp a few months ago. It was more a test than really something to listen to. It used the 9240/240 Mosfets. Now I want to....
The IN914 (little glassy diode) and the zener diodes all have bands on the body which must be put in the direction shown on the drawing. The bands ar ` e at the K end of the diodes. A magnifying glass will help to locate the bands and also to check the....
This project will indicate the volume level of the audio going to your speakers by lighting up LEDS. The LEDS can be any color so mix them up and really make it look good. The input of the circuit is connected to the speaker output of your audio amplifier.....
The SN754410 Dual Motor Control circuit can be seen below. It is just about as simple as it looks with the PIC being the central processor. The main parts used and seen in the schematic below are the 7805, 18F452 and SN754410. The LM7805 +5v Regulator is....
This handy little circuit can tell the difference between darkness and light, making it very useful for switching on and off signs, porch lights or other things when it gets dark or light...
This circuit is similar to the one above but uses positive feedback to get a little more amplitude to the speaker. I copied it from a small 5 transistor radio that uses a 25 ohm speaker. In the circuit above, the load resistor for the driver transistor is....
We`ve already seen one example of a monostable multivibrator in use: the pulse detector used within the circuitry of flip-flops, to enable the latch portion for a brief time when the clock input signal transitions from either low to high or high to low. The....
This article describes how to build a simple inductance meter. The PCB layout is included....
At first glance this circuit looks fairly complex, but when broken down, can be divided into high pass and low pass filter sections followed by a summing amplifier with a gain of around 20 times. Supply rail voltage is +/- 9V DC. The controls may also be....
This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days....
This easyelectronicbuzzercircuitbuilt based on timer works for gaining the frequency. The IC timer NE555 used as astable multivibrator operating at about 1kHz and produces a sound when switched on. The sound frequency can be adjusted by varying the 10K....
FM Radio project detailed here is based on SONY 1619 chip. This is single chip radio means, everything from Antenna to Speaker is done by Sony IC, specially designed for AM/FM Radios. Radio is designed on a double sided PTH Board and works on USB power.....
Although the Audionics CC-2 is named after Cliff Moulton (Audionics` chief engineer) and Charles Wood (Prez of Audionics), as usual in the business world, the principals in the company masked the identity of the real creator - Bob Sickler, whose name appears....
If a strip of conductive metal is stretched, it will become skinnier and longer, both changes resulting in an increase of electrical resistance end-to-end. Conversely, if a strip of conductive metal is placed under compressive force (without buckling), it....
LCD comes in various configurations and the most popular one is 16x2 matrix display. This article shows the interfacing of ATmega16 with LCD by displaying a simple character on the LCD. In this project LCD is working in 8-bit mode i. e. , the data....
Daily switching power supply, mainly offer the direct current power supply for electronic device and supply power. The required direct-current volts of the electronic device, ranges are generally all between several volts and more than ten volts, and the....
This Bat Detector Circuit is authored by Chris Eve. Basic tests with a variety of salvaged electret microphones all showed good response to 50kHz and beyond, the smaller the unit the better the response. My tests indicate that a small electret microphone has....
Before getting started an acknowledgement is due, the circuit presented here uses an ingenious method of controlling a flyback converter by the voltage developed on a cur-rent sensing resistor, this was published by Andrew Armstrong in the July 1992 issue of....
Here the circuit diagram of Lantern dimmer/flasher designed by Tony Van Roon: Electronic parts List: R1 = 100K R2 = 100K R3 = 100K R4 = 100K R5 = 3K9 R6 = 3K9 R7 = 470 R8 = 100 R9 = 220, 1/2 watt P1 = 5K C1, C3 = 10uF/16V C2 = 0. 01uF, ceramic T1. This....
A car battery deteriorates in use and its life seldom exceeds four years. When new, its voltage may drop to only 2V while cranking the engine. As the battery ages, its internal impedance increases and so the voltage drop while cranking also increases, until....
The circuit being very simple, this project can be used as a first NXT hardware hack. A white LED (D1) is powered through a 150 ohm resistor (R1) by the 4. 3V NXT power supply. The threshold of white LEDs is about 3. 5V, so the current in the resistor will....
This circuit is a Mosfet-based linear voltage regulator with a voltage drop of as low as 60mV at 1A. The circuit uses a 15V-0-15V transformer and employs an IRF540 N-channel Mosfet (Q1) to deliver the regulated 12V output. The gate drive voltage required for....
Here is the circuit diagram of a 5V transformer less power supply using minimum components. The working of this circuit is quite simple. Resistor R1 does the job of current limiting and bridge D1 rectifies the mains voltage. The Zener diode regulates the....
Some of you might wonder why a charger is needed at all, to charge a 12 Volt battery from a 12 Volt source! Well, firstly the "12 Volt" source will typically vary anywhere from 11 Volt to 15 Volt, and then a battery needs a controlled charge current and....
The TPS6420x controller is designed to operate from one to three series-connected cells or from a 3. 3 V or 5 V supply obtained from a USB port. At its output it can produce 3. 3 V at 2 A, suitable for powering a microcontroller-based system. With a suitable....
Detector Components & Infrared Motion Work, Electronic Circuit Schematic Wiring Diagram, Detector Components & Infrared Motion Work...
This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores. The 1K resistors in the circuit are essential so that the....
This simple circuit helps you sniff out RF radiation leaking from your transmitter, improper joints, a broken cable or equipment with poor RF shielding. The tester is designed for the 2-m amateur radio band (144-146 MHz in Europe). The instrument has a....
Hi everybody. I need H-bridge schematic for 230V 50Hz output from DC 350V, using 555 timer IC and mosfets....
