New Circuits Page 9
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CAN Controller Area Network Bus line, namely control device LAN. Because of having high performance, high reliability and unique design, CAN bus line paid attention to more and more by people. Bosch Company of Germany controls and control system design CAN....
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The following circuit shows about Power Amplifier Electronic Circuits-Tube Audio RF Amplifiers Circuit Diagram. This circuit based on the LM324 IC ....
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This is a current sensing circuit that senses the current at the high side (between load and positive supply). This circuit take advantage from....
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When USB present and device needs to work, VSupply is directly provided by the USB and PMOS separates the battery from the supply. (R3 ensures PMOS is on when there is no USB) Primary reason for this is not to disturb the proper charging of the battery.....
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12 Volt / 2 A Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram...
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Any vacuum-tube oscillator configuration has an equivalent transistor circuit. For example, consider the vacuum-tube oscillator, illustrated in Fig. 6-1 (A), which represents one form of Hartley oscillator. Positive feedback is accomplished by arranging the....
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This voice changer circuit diagram electronic project is designed using the RTS0072B single chip CMOS LSI designed for voice changer applications, which can transpose or distort one voice into another voice by encoding the input audio signals in normal speed....
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Electronics Tutorial about Active Low Pass Filter including Low Pass Filter Frequency Response, Op-amp Voltage Gain and Active Filter Construction....
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The part of the hardware mainly finishes the magnification of sound, when the sound is enough large, have measured on can lead this signal into the one-chip computer ing. The hardware makes up the frame picture and is shown by 1-1. Mainly made up of CPU,....
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AN6884 is a logarithmic scale LED bar display driver. AN6884 accept wide range of supply voltage, ranging from 3.5V to 16V. This VU (voltage unit) bar display...
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The next stage is working with the first stage as well it is a fully-complementary. The cascode circuit is also in this place to improve linearity of the amplifiers. Cascode circuit requires a constant reference voltage biasing to make a cascode transistor....
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This is a TV Remote Control Jammer circuit. Remote control use modulated light to combat eer infrared nvironment/background infrared noise. Your room heater,....
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So I wasn`t really in the mood of making and coding the timing controller for the PCB laser printer. And I remembered I had this laser tag gun that I took out of optical alignment the last time I took it apart. I figured it wouldn`t be a bad idea to take it....
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These were about $60 a pair with charger and batteries, and have a three-bar battery gauge. With experimentation I found that if the voltage is greater than 4. 28V, all three bars light up. More than 3. 47V, two bars will light up. Below this latter voltage....
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This circuit is used to measure the voltage on a 12V (nominal) lead acid rechargeable battery system. It was specifically designed for use in solar powered systems, but is general enough that it can be used for automotive or other 12V systems. Lead acid....
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-
Audio Level Meter Description A simple and low cost audio level meter circuit that can be used to measure the audio level of your sound source. This circuit is a valuable tool for those who are interested in audio circuits. The circuit is designed with a....
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This circuit is DC Dimmer Circuit. By use IC LM555 be model Astable Multi vibrator. It is can change translate Duty Cycle with fining VR1 and VR2 be....
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This relay driver boosts the input impedance with a regular BC547 NPN transistor (or equivalent). Very common driver. It can drive a variety of relays, including a reed-relay. Transistor Q1and Q2 are a simple common-emitter amplifier that increases the....
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The program uses the internal 4MHz oscillator PIC16F628 2 Input Alarm Circuit....
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You may need a different wiper motor in some cases, rebuilt units are typically available at the parts store for a reasonable cost. Once you have the parts and the manuals, it should be a simple matter of installing the right switch, motor, and (if needed)....
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The diagram below shows that power supplies don`t have to be complicated, especially in low-power designs. The filaments are powered directly from the 120 volt AC line, minimising the size of the transformer(s) required to drive the amplifier. Note the....
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WxVoice is an automated voice-back system that uses your PC`s voice modem to speak the current and past weather conditions over the telephone. WxVoice takes advantage of Text-to-Speech (TTS) technology to produce a more natural sounding dialogue than other....
-
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device is switched-on feeding any appliance connected to SK1. Input audio signal is boosted and squared....
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AH1751 is a single-digital-output Hall-effect Sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an Amplifier to amplify Hall voltage, and a Comparator to provide switching hysteresis for noise....
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Stepper motors are a subject that keeps recurring. This little circuit changes a clock signal (from a square wave generator) into signals with a 90-degree phase difference, which are required to drive the stepper motor windings. The price we pay for the....
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After we published the original Li`l 7 AM Transmitter plans, fellow experimenter Scott Todd sent us information about his design for a similar portable, battery-powered transmitter. -Original Message- From: Scott Todd Sent: Wednesday, April 12, 2000 8:58 AM....
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Create a new project by selecting the New Project option from the Getting Started menu or by selecting Select File > New Project. This brings up a Dialog box where you can enter the desired project name and location. Choose a meaningful name. You can also....
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Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal ...
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When the sun position is changing so does the illumination level on the LDRs and the input voltage for the window comparator is no longer half of the supply voltage thereby the output of the comparator generates informations for the motor that rotates the....
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This circuit was requested by an school teacher. It is a simple intercom that anyone can put together and get to work. It is based on the LM380 IC chip. T....
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The Flip-Flop Robot drives forward until it hits an obstacle, and then reverses until it hits another obstacle. This back-and-forth process continues indefinitely. By limiting the functionality to this very rudimentary behavior, it can be generated from an....
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This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
-
This circuit is based on a simple asymmetric oscillator. The length of time the relay remains energized - and the length of time it remains de-energized - are set independently. With the component values shown in the diagram - both periods are adjustable....
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Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a....
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This is a simple low-cost 50W off-line switching power supply, which can be used for home projects or to learn operation of flyback converters. It can work over a universal AC line input range 90-264 VAC and provides a 12VDC output at more then 4A load. Line....
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Here is a simple code for reading tags from the id12 RFID reader. It should be quite easy to modify if you know the dataformat your reader is sending out. Here is how to hook it up for serial communications, either using a microcontroller like arduino or....
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This circuit is based around the PIC 16C84 (or PIC 16F84) microcontroller. This chip is actually a small computer contained in a single chip, including RAM memory, EEPROM, I/O ports, CPU and so on. When you buy this chip, it comes empty with no program on....
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This circuit uses a complementary pair comprising NPN metallic transistor T1 (BC109) and pnp germanium transistor T2 (AC188) to detect heat (due to outbreak of fire, etc) in the vicinity and energise a siren. The collector of transistor T1 is connected to....
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This is a simple high gain JFET audio amplifier circuit. This circuit need very low power but it provides high gain amplifying function. It also called `JFET....
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Now we bring you two versions of a homemade digital thermometer with ICL7106 that I recently built. One version uses a LED display, the second version LCD display. In both versions, is used silicon transistor as a temperature sensor. The temperature is....
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This Led table or reading lamp circuit can be used for many purposes for example as a reading lamp for bed, desktop or table lamp, keyboard lamp (to view keys of your computer keyboard in dim light), as an LED emergency light in the absence of AC supply, as....
-
As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs. Like other flasher circuit, this circuit alternately switch the....
-
This simple microphone preamplifier is based on the LM318 op amp. The LM318 op amp is operated as a standard non-inverting amplifier. Resistor R1 provides an input path to ground for the bias current of the non-inverting input. The combination of R2 and C2....
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A commercial motor controller is more than simply a circuit to alter the speed of the motor and we have a `guided tour` of controller features which explains simply most of the features incorporated into modern controllers and why they are needed. To control....
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This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. The probe connects to the PC serial port. So by using the crystal oscillator already present on your PC....
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This system is used to distribute IR commands around your house. This is useful if you have A/V equipment in one room that you want control from several other rooms. This project uses one Microchip PIC 16F877 to do all the work. The firmware is written in....
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With the technical development, appearance and employing extensively of the large high-accuracy dynamic range D/ A converter at full speed of digital signal processing, because of sampling technique and computing technique, generated frequency is relatively....
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When connection to PC speaker is plugged in and Telephone connection(bottom-left) is plugged in, I hear humming in the headphones. When only one is plugged in I hear it without distortion. Sound files showing humming. If you criticise my circuitry, add....
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Have you seen Audi, Lexus or Ford rain sensing wipers and wondered how they work in these vehicles They are handled by sensors at the center of the windscreen which detects rain water and turns on the wiper motor. Here is the working of rain sensitive wipers....
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Microdot - wrist watch LED pattern timepiece Another RGB Sunset Productions production! This project is a circuit board for making a wrist watch size versi....
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The circuit functions like a unijunction transistor relaxation oscillator. The base of the lower PNP transistor is biased at roughly half supply. As the 100pF capacitor is charged up through the 1G resistor, the base of the upper NPN transistor reaches a....
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Here is a simple 3 input mic mixer circuit using the popular uA 741 ICs. Four 741s are used here. IC1, IC2, IC3 are used as preamplifiers. They produce a gain of around 40 decibel to the individual input signals. The IC4 is wired as a summing amplifier to....
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learn to use microcontrollers to create traffic-light applications. In this project we will use microcontroller AVR-007 from Circuits-Home. Before creating the program, the first job we have to do is understand about the hardware specs...
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This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. Valves (also known as vacuum tubes) are very high input....
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An excellent way to provide continuous and direct indication of ESV readings in even a large lecture hall is to combine this instrument with a tonal voltmeter (TVM). The TVM puts out an audible tone of constant amplitude, with the frequency related to the....
-
At the heart of this circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and directly proportional o....
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The orientation of the camera at launch is looking out the side of the rocket and during descent on the parachute, it is looking down. To allow the camera to look down during lift off, an external mirror can be optionally added. Located in the nose cone of....
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This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna we....
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One of more advanced PCB manufacturing methods is exposing laminate copper boards covered by photo resistive layer through mask. Using UV light in manufacturing PCBa‚¬ s has many benefits according to other methods: you can get thin tracks like 0. 2mm. You....
-
This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends the preset time....
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Nokia 6500 camera problem like camera operation failed or camera blank, can be solved by doing a little trick. The pictures below relating to Nokia 6500 slide camera problem, try to make a jumper like shown by the picture. The picture also show you the IC....
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protection against reverse voltage. The 10mfd provides additional DC filtering. The CD4007 is configured as a flip-flop( )controlled by the foot switch. The output of the flip-flop drives the indicator The 18v appears to go through a 100k resistor, then to....
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There are 3 basic types of earphones, each with their set of benefits and problems. Small transducers that are inserted into the auditory canal. This leaves only a few millimeters of a mismatched acoustic transmission line between the vibrating diaphragm of....
-
This project involves the construction of a low-cost curve tracer that is suitable for testing a wide variety of electronic components both in-circuit and out of circuit. It is easy to construct and extremely useful for finding defective parts, especially....
-
This web page describes the radio transmitter unit that flew aboard the Cirrus One rocket in April 2001. The intent of including the transmitter as payload was to: As the Cirrus One rocket was expected to achieve an altitude that would be well out of visual....
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Feeling chirpy? Attract new friends with this modified hartley oscillator. You could also use it as a replacement doorbell....
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Over-Temperature Alarm Circuit Uses Common, Inexpensive Components | Negative-temperature-coefficient (NTC) thermistor, ICs...
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This circuit allows you to set a limit on the maximum output current available from your PSU. It`s very useful when you power-up a project for the first time - or carry out a soak-test. By setting an upper limit on the current available from your PSU - you....
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The two unspecified polarized capacitors (one directly above the transformer and one directly to the right of the transformer) are actually each a pair of 470 µF capacitors in parallel (for a total of four 470 µF capacitors). These capacitors MUST be Low-ESR....
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This simple circuit can be used to monitor whether a battery is charging or not. The voltage comparator IC LM393 is the heart of this circuit. The LED D1 will remain ON whenever there is at least 25 milli ampere current flowing to the battery. This....
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Sawtooth wave generator using NE555 and opamp uA741. NE555 is wired as square wave generator and opamp is wired as integrator.Circuit diagra, and working theory....
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The Demodulating Receiver (A3017) contains a 902 ’930 MHz 30-dB amplifier, a downshifer, a 60-dB 50-MHz limiting IF amplifier, a frequency discriminator, and an amplitude demodulator. The A301701A circuit board also includes, just for good measure, more....
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This is a Turbo Bass circuit. Using this circuit, the low frequency sound signals(bass) can be multiplied. This circuit is an active circuit. The first op-amp....
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A Center tap 50Hz Step Down Transformer with two diodes is used to get a train of Positive Sine Pulses at 100Hz which is applied to Q6 base via R51. 2N2646 is a unijunction transistor(UJT) in a TO-18 metal package. The control voltage or voltage proportional....
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Laptop schematic diagram volvi blog diagram, DDR1 DDR2, Mobile cpu 478 celeron, ICH7M, audio circuit using G1431Q, Codec ALC268, opamp G1412, Modem MDC Card, HDD in, mini usb, Blue tooth, cdrom, Bios, camera....
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The automatic door handle alarm circuit gives a audible alarm and glows a LED when somebody touches the handle of the door. The circuit is latching type and continues to produce sound until it is switched off. The transistor Q1 is wired as an astable....
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This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
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Similar to the two transistor solid state Tesla Coil already on this site, this solid state Tesla Coil design uses a normal flyback transformer to generate it`s high voltage output. Unlike the other circuit, this one does not use two huge power transistors....
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This circuit has can to turn down a light bulb arrives at 100W. If Triac there is tall temperature should hold Heat Sink or let off the heat. The Diac be diode that perform be formed encourage or Trigger Diode 2 kinds are way or Bidirectional. The VR1 use....
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A simple frequency to voltage converter circuit designed around the TC9400 F to V / V to F converter IC. Dual and single supply versions are given here....
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This simple code practice oscillator project for beginners to Continuous Wave Morse Code uses a 555 timer to generate a dit or dah sound when the key is pressed ..
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The concept is that a pair of yellow LEDs are placed in an otherwise inconspicuous pumpkin, and a photo sensor allows the circuit to turn on the lights at night. The circuit itself is very straightforward, incorporating minimal components. There are two....
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CAN Controller Area Network Bus line, namely control device LAN. Because of having high performance, high reliability and unique design, CAN bus line paid attention to more and more by people. Bosch Company of Germany controls and control system design CAN....
The following circuit shows about Power Amplifier Electronic Circuits-Tube Audio RF Amplifiers Circuit Diagram. This circuit based on the LM324 IC ....
This is a current sensing circuit that senses the current at the high side (between load and positive supply). This circuit take advantage from....
When USB present and device needs to work, VSupply is directly provided by the USB and PMOS separates the battery from the supply. (R3 ensures PMOS is on when there is no USB) Primary reason for this is not to disturb the proper charging of the battery.....
12 Volt / 2 A Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram...
Any vacuum-tube oscillator configuration has an equivalent transistor circuit. For example, consider the vacuum-tube oscillator, illustrated in Fig. 6-1 (A), which represents one form of Hartley oscillator. Positive feedback is accomplished by arranging the....
This voice changer circuit diagram electronic project is designed using the RTS0072B single chip CMOS LSI designed for voice changer applications, which can transpose or distort one voice into another voice by encoding the input audio signals in normal speed....
Electronics Tutorial about Active Low Pass Filter including Low Pass Filter Frequency Response, Op-amp Voltage Gain and Active Filter Construction....
The part of the hardware mainly finishes the magnification of sound, when the sound is enough large, have measured on can lead this signal into the one-chip computer ing. The hardware makes up the frame picture and is shown by 1-1. Mainly made up of CPU,....
AN6884 is a logarithmic scale LED bar display driver. AN6884 accept wide range of supply voltage, ranging from 3.5V to 16V. This VU (voltage unit) bar display...
The next stage is working with the first stage as well it is a fully-complementary. The cascode circuit is also in this place to improve linearity of the amplifiers. Cascode circuit requires a constant reference voltage biasing to make a cascode transistor....
This is a TV Remote Control Jammer circuit. Remote control use modulated light to combat eer infrared nvironment/background infrared noise. Your room heater,....
So I wasn`t really in the mood of making and coding the timing controller for the PCB laser printer. And I remembered I had this laser tag gun that I took out of optical alignment the last time I took it apart. I figured it wouldn`t be a bad idea to take it....
These were about $60 a pair with charger and batteries, and have a three-bar battery gauge. With experimentation I found that if the voltage is greater than 4. 28V, all three bars light up. More than 3. 47V, two bars will light up. Below this latter voltage....
This circuit is used to measure the voltage on a 12V (nominal) lead acid rechargeable battery system. It was specifically designed for use in solar powered systems, but is general enough that it can be used for automotive or other 12V systems. Lead acid....
Audio Level Meter Description A simple and low cost audio level meter circuit that can be used to measure the audio level of your sound source. This circuit is a valuable tool for those who are interested in audio circuits. The circuit is designed with a....
This circuit is DC Dimmer Circuit. By use IC LM555 be model Astable Multi vibrator. It is can change translate Duty Cycle with fining VR1 and VR2 be....
This relay driver boosts the input impedance with a regular BC547 NPN transistor (or equivalent). Very common driver. It can drive a variety of relays, including a reed-relay. Transistor Q1and Q2 are a simple common-emitter amplifier that increases the....
The program uses the internal 4MHz oscillator PIC16F628 2 Input Alarm Circuit....
You may need a different wiper motor in some cases, rebuilt units are typically available at the parts store for a reasonable cost. Once you have the parts and the manuals, it should be a simple matter of installing the right switch, motor, and (if needed)....
The diagram below shows that power supplies don`t have to be complicated, especially in low-power designs. The filaments are powered directly from the 120 volt AC line, minimising the size of the transformer(s) required to drive the amplifier. Note the....
WxVoice is an automated voice-back system that uses your PC`s voice modem to speak the current and past weather conditions over the telephone. WxVoice takes advantage of Text-to-Speech (TTS) technology to produce a more natural sounding dialogue than other....
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device is switched-on feeding any appliance connected to SK1. Input audio signal is boosted and squared....
AH1751 is a single-digital-output Hall-effect Sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an Amplifier to amplify Hall voltage, and a Comparator to provide switching hysteresis for noise....
Stepper motors are a subject that keeps recurring. This little circuit changes a clock signal (from a square wave generator) into signals with a 90-degree phase difference, which are required to drive the stepper motor windings. The price we pay for the....
After we published the original Li`l 7 AM Transmitter plans, fellow experimenter Scott Todd sent us information about his design for a similar portable, battery-powered transmitter. -Original Message- From: Scott Todd Sent: Wednesday, April 12, 2000 8:58 AM....
Create a new project by selecting the New Project option from the Getting Started menu or by selecting Select File > New Project. This brings up a Dialog box where you can enter the desired project name and location. Choose a meaningful name. You can also....
Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal ...
When the sun position is changing so does the illumination level on the LDRs and the input voltage for the window comparator is no longer half of the supply voltage thereby the output of the comparator generates informations for the motor that rotates the....
This circuit was requested by an school teacher. It is a simple intercom that anyone can put together and get to work. It is based on the LM380 IC chip. T....
The Flip-Flop Robot drives forward until it hits an obstacle, and then reverses until it hits another obstacle. This back-and-forth process continues indefinitely. By limiting the functionality to this very rudimentary behavior, it can be generated from an....
This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
This circuit is based on a simple asymmetric oscillator. The length of time the relay remains energized - and the length of time it remains de-energized - are set independently. With the component values shown in the diagram - both periods are adjustable....
Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a....
This is a simple low-cost 50W off-line switching power supply, which can be used for home projects or to learn operation of flyback converters. It can work over a universal AC line input range 90-264 VAC and provides a 12VDC output at more then 4A load. Line....
Here is a simple code for reading tags from the id12 RFID reader. It should be quite easy to modify if you know the dataformat your reader is sending out. Here is how to hook it up for serial communications, either using a microcontroller like arduino or....
This circuit is based around the PIC 16C84 (or PIC 16F84) microcontroller. This chip is actually a small computer contained in a single chip, including RAM memory, EEPROM, I/O ports, CPU and so on. When you buy this chip, it comes empty with no program on....
This circuit uses a complementary pair comprising NPN metallic transistor T1 (BC109) and pnp germanium transistor T2 (AC188) to detect heat (due to outbreak of fire, etc) in the vicinity and energise a siren. The collector of transistor T1 is connected to....
This is a simple high gain JFET audio amplifier circuit. This circuit need very low power but it provides high gain amplifying function. It also called `JFET....
Now we bring you two versions of a homemade digital thermometer with ICL7106 that I recently built. One version uses a LED display, the second version LCD display. In both versions, is used silicon transistor as a temperature sensor. The temperature is....
This Led table or reading lamp circuit can be used for many purposes for example as a reading lamp for bed, desktop or table lamp, keyboard lamp (to view keys of your computer keyboard in dim light), as an LED emergency light in the absence of AC supply, as....
As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs. Like other flasher circuit, this circuit alternately switch the....
This simple microphone preamplifier is based on the LM318 op amp. The LM318 op amp is operated as a standard non-inverting amplifier. Resistor R1 provides an input path to ground for the bias current of the non-inverting input. The combination of R2 and C2....
A commercial motor controller is more than simply a circuit to alter the speed of the motor and we have a `guided tour` of controller features which explains simply most of the features incorporated into modern controllers and why they are needed. To control....
This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. The probe connects to the PC serial port. So by using the crystal oscillator already present on your PC....
This system is used to distribute IR commands around your house. This is useful if you have A/V equipment in one room that you want control from several other rooms. This project uses one Microchip PIC 16F877 to do all the work. The firmware is written in....
With the technical development, appearance and employing extensively of the large high-accuracy dynamic range D/ A converter at full speed of digital signal processing, because of sampling technique and computing technique, generated frequency is relatively....
When connection to PC speaker is plugged in and Telephone connection(bottom-left) is plugged in, I hear humming in the headphones. When only one is plugged in I hear it without distortion. Sound files showing humming. If you criticise my circuitry, add....
Have you seen Audi, Lexus or Ford rain sensing wipers and wondered how they work in these vehicles They are handled by sensors at the center of the windscreen which detects rain water and turns on the wiper motor. Here is the working of rain sensitive wipers....
Microdot - wrist watch LED pattern timepiece Another RGB Sunset Productions production! This project is a circuit board for making a wrist watch size versi....
The circuit functions like a unijunction transistor relaxation oscillator. The base of the lower PNP transistor is biased at roughly half supply. As the 100pF capacitor is charged up through the 1G resistor, the base of the upper NPN transistor reaches a....
Here is a simple 3 input mic mixer circuit using the popular uA 741 ICs. Four 741s are used here. IC1, IC2, IC3 are used as preamplifiers. They produce a gain of around 40 decibel to the individual input signals. The IC4 is wired as a summing amplifier to....
learn to use microcontrollers to create traffic-light applications. In this project we will use microcontroller AVR-007 from Circuits-Home. Before creating the program, the first job we have to do is understand about the hardware specs....gif "Valve audio amplifier technical specification")
This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. Valves (also known as vacuum tubes) are very high input....
An excellent way to provide continuous and direct indication of ESV readings in even a large lecture hall is to combine this instrument with a tonal voltmeter (TVM). The TVM puts out an audible tone of constant amplitude, with the frequency related to the....
At the heart of this circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and directly proportional o....
The orientation of the camera at launch is looking out the side of the rocket and during descent on the parachute, it is looking down. To allow the camera to look down during lift off, an external mirror can be optionally added. Located in the nose cone of....
This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna we....
One of more advanced PCB manufacturing methods is exposing laminate copper boards covered by photo resistive layer through mask. Using UV light in manufacturing PCBa‚¬ s has many benefits according to other methods: you can get thin tracks like 0. 2mm. You....
This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends the preset time....
Nokia 6500 camera problem like camera operation failed or camera blank, can be solved by doing a little trick. The pictures below relating to Nokia 6500 slide camera problem, try to make a jumper like shown by the picture. The picture also show you the IC....
protection against reverse voltage. The 10mfd provides additional DC filtering. The CD4007 is configured as a flip-flop( )controlled by the foot switch. The output of the flip-flop drives the indicator The 18v appears to go through a 100k resistor, then to....
There are 3 basic types of earphones, each with their set of benefits and problems. Small transducers that are inserted into the auditory canal. This leaves only a few millimeters of a mismatched acoustic transmission line between the vibrating diaphragm of....
This project involves the construction of a low-cost curve tracer that is suitable for testing a wide variety of electronic components both in-circuit and out of circuit. It is easy to construct and extremely useful for finding defective parts, especially....
This web page describes the radio transmitter unit that flew aboard the Cirrus One rocket in April 2001. The intent of including the transmitter as payload was to: As the Cirrus One rocket was expected to achieve an altitude that would be well out of visual....
Feeling chirpy? Attract new friends with this modified hartley oscillator. You could also use it as a replacement doorbell....
Over-Temperature Alarm Circuit Uses Common, Inexpensive Components | Negative-temperature-coefficient (NTC) thermistor, ICs...
This circuit allows you to set a limit on the maximum output current available from your PSU. It`s very useful when you power-up a project for the first time - or carry out a soak-test. By setting an upper limit on the current available from your PSU - you....
The two unspecified polarized capacitors (one directly above the transformer and one directly to the right of the transformer) are actually each a pair of 470 µF capacitors in parallel (for a total of four 470 µF capacitors). These capacitors MUST be Low-ESR....
This simple circuit can be used to monitor whether a battery is charging or not. The voltage comparator IC LM393 is the heart of this circuit. The LED D1 will remain ON whenever there is at least 25 milli ampere current flowing to the battery. This....
Sawtooth wave generator using NE555 and opamp uA741. NE555 is wired as square wave generator and opamp is wired as integrator.Circuit diagra, and working theory....
The Demodulating Receiver (A3017) contains a 902 ’930 MHz 30-dB amplifier, a downshifer, a 60-dB 50-MHz limiting IF amplifier, a frequency discriminator, and an amplitude demodulator. The A301701A circuit board also includes, just for good measure, more....
This is a Turbo Bass circuit. Using this circuit, the low frequency sound signals(bass) can be multiplied. This circuit is an active circuit. The first op-amp....
A Center tap 50Hz Step Down Transformer with two diodes is used to get a train of Positive Sine Pulses at 100Hz which is applied to Q6 base via R51. 2N2646 is a unijunction transistor(UJT) in a TO-18 metal package. The control voltage or voltage proportional....
Laptop schematic diagram volvi blog diagram, DDR1 DDR2, Mobile cpu 478 celeron, ICH7M, audio circuit using G1431Q, Codec ALC268, opamp G1412, Modem MDC Card, HDD in, mini usb, Blue tooth, cdrom, Bios, camera....
The automatic door handle alarm circuit gives a audible alarm and glows a LED when somebody touches the handle of the door. The circuit is latching type and continues to produce sound until it is switched off. The transistor Q1 is wired as an astable....
This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
Similar to the two transistor solid state Tesla Coil already on this site, this solid state Tesla Coil design uses a normal flyback transformer to generate it`s high voltage output. Unlike the other circuit, this one does not use two huge power transistors....
This circuit has can to turn down a light bulb arrives at 100W. If Triac there is tall temperature should hold Heat Sink or let off the heat. The Diac be diode that perform be formed encourage or Trigger Diode 2 kinds are way or Bidirectional. The VR1 use....
A simple frequency to voltage converter circuit designed around the TC9400 F to V / V to F converter IC. Dual and single supply versions are given here....
This simple code practice oscillator project for beginners to Continuous Wave Morse Code uses a 555 timer to generate a dit or dah sound when the key is pressed ..
The concept is that a pair of yellow LEDs are placed in an otherwise inconspicuous pumpkin, and a photo sensor allows the circuit to turn on the lights at night. The circuit itself is very straightforward, incorporating minimal components. There are two....
