New Circuits Page 52
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Water level controller circuit described here control the water level inside a tank. There two modes available with this water level controller circuit. The...
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A simple whole house FM transmitter circuit diagram and description. Operating power is 1.5V battery of any type. This circuit is able to transmit at a distance of 30 meter. ....
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This is the version with 3 6N11 tubes. And as far as I can see identical to the Phenix. It looks and feels very well made. The separate power supply is a bit bulky but works well and keeps the size of the main box small and cute. The on/off switch is....
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Operating a stepper motor using a fixed (constant) voltage supply results in poor torque at high speeds. In fact, stepper motors tend to stall at fairly low speeds under such conditions. Several approaches can be used to overcome this problem, one of which....
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Hey freinds i m doing project on RFID(Radio Frequency Identification). I m using AT89c51/52/S52 uC. I m using RS-232 fror serial communication, he....
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If you`re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether someone rang while you were out. Of course, you can`t tell whether it was the visitor you were....
-
The Kill A Watt is an awesome product; it measures volts, amps and power factor of an individual appliance which can be used to calculate power, cost to run, etc. It`s also quite hackable. But I wanted something that would give me the same data for my whole....
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This website was created to help students find idea for their project/FYP. All the content presented here are found from me, reliable blogs, website and forums. The owner of this website takes no responsibility what so ever for any of the content. If you....
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This dimmer is used to adjust the brightness of incadescent bulbs (dimming) from zero to maximum. Regulation from zero is achieved using double delay circuit. The circuit is two-terminal connected and so it can be installed into switch box without modifying....
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This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is nothing worse than having to find the cause of a....
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I was sitting around trying to decide how to wire my fog lights up. I`ve seen people wire them directly off the low beam or....
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As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET....
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This is the first draft of the pH to 1-Wire converter schematic, and some of the component values are still missing. The original circuit runs on 12 VDC, but since the A/D converter IC must be supplied with 5 VDC only I want to scale down the circuit, so....
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With IC SLB0586A from Siemens you can build a simple touch light dimmer circuit that will allow you to adjust the lamp intensity. Together with a TIC206D triac, it enables smooth regulation of light intensity from a bulb of 10W 400W. A coil of 100 µH/5A is....
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Those wanting private listening to their music program should add this Headphone Amplifier to the Modular Preamplifier chain. The circuit was kept as simple as possible compatibly with a High Quality performance. This goal was achieved by using two NE5532....
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This is a 5Volt to 12Volt DC-DC step-up (boost) converter circuitry with the intention of is especially ideal pro the USB powered applications. primarily of all a USB harbor has two current supply modes. beforehand detecting the connected device, it food....
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This circuit is of an 2x 2, 500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power....
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The circuit below is similar to the one above but can be used with a laser pointer to toggle the relay rather than a push button. The IR photo transistor Q1 (Radio Shack 276-145A) or similar is connected to the set input (pin 6). The photo transistor should....
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This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source..
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Hooked up an electret mic into an opamp and gave output to my arduino microcontroller. The ADC on the microcontroller converts a range of 0 to 5 vV to a 10-bit number (0 to 1023). The problem is that the output from the latter two chips is not "clean". The....
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All that remains now is for the code to be `, compiled and converted to a HEX file that the PIC can understand. This is achieved easily with the PIC compiler that comes with the PICBASIC package. The PIC is programmed with any of the parallel or serial port....
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This circuit uses two comparator that are combined in what is called a window comparator, i. e. resistors R2, R5, and R10 determine a voltage window within which the voltage applied to the junction of D2 and D6 must lie in order for the outputs of IC2. A and....
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This is a design circuit for scoring game circuit that can be used for all occasions when a dice is needed. The circuit is based on a NE555 timer, a 74LS192 counter, a74LS247 decoder and a & segment LED display. The timer IC1 will produce the clock for the....
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Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. This is the circuit quality preamplifier with built-in USB DAC for my Leachamp power amplifier. Scheme is PCM2902 datasheet.....
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This analog sequencer was designed with the idea of cooperative play in mind. It can be used as a standalone instrument, or linked together with other sequencers running on the same clock speed. Mark Kleback and I were working separately working on....
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As shown by the block diagrams in Figure 1, overall signal flow in this five-input mixer was minimally changed upon modification, but I added solid-state buffers that drive independent direct outputs for the five preamp channels. For each channel, the audio....
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By use of transformers one can apply both voltage feedback and current feedback. There was an article in Ham Radio november 1979 by DJ2LR Ulrich Rohde giving details about this circuit. For the 2. 5MHz to audio converter the transformation ratio from drain....
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Figure 36 is the circuit of a preamplifier with high impedance input and an output circuit allowing coupling to a main amplifier. It will be found extremely useful for purposes such as boosting the signal from a crystal microphone. The input socket,....
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This has been the first Mosfet power amplifier of me, It is the most complete circuit. As a 60 watt power amplifier, this is sufficient for normal use in my....
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This stereo amplifier is for car purpouse and can deliver up to 2 x 22W using a single TDA1557Q or TDA1553Q from Philips. TDA1557Q TDA1553Q datasheet More audio car amplifier circuits....
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This circuit can be used as a small beacon or marker light, amd toys or novelty items. R1 is an LDR that has‰¥10 k © dark-resistance, or a CDS photocell. C1 determines the flash rate. ..
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This power supply will work accurately where you have the need of stable 18V DC and provides current upto 1. 5A. The circuit is using a LM7818 positive voltage regulator IC. This IC has many built in features like internal current limiting, short circuit....
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This is a two-zone alarm - with automatic exit, entry and siren cut-off timers. It can be triggered by the usual types of normally-closed input devices - such as magnetic reed contacts - foil tape - PIRs etc. I`ve used a 12-volt supply in the diagram - but....
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Using this circuit you can convert the 12V dc in to the 220V Ac. In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer. Disclaimer All files are found using....
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This circuit generates a tone that sounds very similar to a siren. The generator part of the circuit is made of the combination of PNP and NPN transistors. Toghether, the two transistors build up a free runing multivibrator. If the C2 capacitor was connected....
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PWM circuits are fun. You can use them to dim LEDs, control the speed of fans and motors, control the power going to a thermoelectric cooler, or control the power going to pretty much anything you want. Just make sure that you don`t exceed the maximum....
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This micro flasher circuit continuously emits flashing light with the consumption of very less power. The circuit can run for a very long time for four 1. 5 V torch cells. Here a low power CMOS IC CD4093 (IC1) is used to produce sharp pulses of 20 ms from a....
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Mono high power amplifier is actually a powerful 1400 W, but if this hihgh power amplifier circuit is doubled and you want to create stereo, high power amplifier the necessary components and pcb requires two-fold. So if the stereo high power amplifier 2 X....
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This is a square wave generator circuit. The main component of this circuit is the 741, a general-purpose operational amplifier. This circuit employs a single power supply Vs that can range from +5V to +15V. The square wave output of this circuit is easy to....
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Metal Detector Circuit Overview The metal detector circuit is an electronic circuit that is specifically designed to detect metal that lies deep in the water...
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Includes direct-coupled preamplifier and driver stages, with considerable d-c feedback to stabilize bias conditions. Voltage gain of amplifier with feedback loop closed is 10, 000. Overall efficiency is 50%. Input impedance is 10, 000 ohms and output....
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A low pass filter is merely a stable state-space system that has an input and spits out an output. If the input is a quasi-periodic signal, then the output would simply be the same quasi-periodic signal with a phase shift. Only difference would be that this....
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In counter mode it provides 1Hz resolution up to 100Mhz. In timer mode maximum resolution is 0. 0000001 Hz up to 1Hz. Resolution is reduced by one digit for each additional decade. Multiple frequency updates per second by employing a sliding window for....
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A line follower is an autonomous bot that can follow a specific colored line painted on a surface of different contrast, such as white on black....
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The basic idea is that the transmitter sends beeps and you turn the directional antenna until you get maximum signal and that is the direction of the transmitter. It doesn`t work terribly well. The reason being the antenna is quite sensitive, so even though....
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The PIC32?s Analog to Digital Converter (ADC) is surprisingly difficult to set up if you re using it for the first time. Like so many of the PIC peripherals, the number of configuration options seem endless. This tutorial will help you....
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The 3D printer requires separate control for three independent axis. Each of the controlled axis must have a high precision electronic driver. Mechanical part of the each axis is based on a precise bipolar stepper motor connected to a drive shaft via claw....
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About the current feedback operational amplifier, even if the open-loop gain was changed, the bandwidth also will not be changed. It is often used in video signal amplificaion and the drive circuit of video cable. The diagram is a vedio inphase amplification....
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This simple LED driver circuit allows us to drive up to seven LEDs by using a single NiMH (Nickel Metal Hydride) AA cell. The circuit produces voltage puls....
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Older TV sets that do not have a diode split flyback usually contain a flyback that gives about 8kV peak, and a subsequent cascade which triples this to about 24kV. These cascades are moulded modules with a number of wires or solder points for input and....
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The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two ""1 of 8 line decoders"" (74HC138 or 74HCT138) to generate the popular ""Night Rider"" display. A Schmitt Trigger oscillator provides the clock signal for the counter and the....
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This section contains intruder alarms for your home, car and motorcycle, power failure and water level alarms and even a snore detector. All circuits are listed alphabetically on the Circuit Index page and in date order on the update page. All contributors....
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Here is a Flasher circuit that directly derives power from AC to give brilliant flashes at the rate of one flash per second. It uses a Diac as the main ele....
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MIL-PRF-19500/543; Semiconductor Device, Transistor, Field Effect, N-Channel, Silicon, Repetitive Avalanche Types 2N6764, 2N6764T1, 2N6766, 2N6766T1, 2N6768, 2N6768T1, 2N6770, and 2N6770T1 [TO-204AE; formerly designated as a TO-3] TO-204 Flange mount.....
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This is a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must....
-
The SM5023 series are 3rd overtone crystal Oscillator module ICs. They feature built-in Oscillator capacitors with excellent frequency response. As cutoff frequency CAN be congured by using an external feedback resis- tor Rfo, a favorable 3rd overtone....
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This car alarm circuit features Exit and Entry delays, an instant alarm zone, an intermittent siren output and automatic Reset. By adding external relays you can immobilize the vehicle and flash the lights....
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By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the water high sensor, whereas the longer is the water low sensor. When the water level is below....
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100 MHz frequency and period counter using the Intersil ICM7226B 40-pin DIP. This circuit uses a CD4016 analog multiplexor to multiplex the digital outputs back to the function input. Since the CD4016 is a digitally controlled analog transmission gate no....
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MK484 AM receiver circuit A simple AM receiver circuit based on the MK484 AM receiver IC from Rapid Electronics Ltd is shown here. MK4844 is a monolithic integrated circuit that has all the necessary sections of a AM receiver like RF amplifier, detector, AGC....
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This is yet another circuit for producing DMX output for entertainment lighting from a PC. Designed with flexibility in mind, a range of circuit configurations are possible. Opting for no isolation requires just a PIC microcontroller and a standard RS-485....
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Latching Continuity Tester. Source: Eldon L. Knight, Tony van Roon A continuity tester is a must on every service bench for testing cables, pcboards, switches, motors, plugs, jacks,...
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CD4060 Timer Circuit 1 minute to 2 hours This is a 1 minute to two-hour timer switch. The 14-stage binary ripple counter Type 4060, IC1, has an....
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The ADM660 is a charge-pump voltage converter that can be used to either invert the input supply voltage or double it. The schematic below appearsADM660 Voltage Inverter Circuit Configuration Diagram. This inverting schematic is ideal for generating a....
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The ADUC836 MicroConverter is a fully integrated 16-bit data acquisition system-on-a-chip. Like all of ADI`s MicroConverter products, it features precision A/D & D/A conversion and a Flash Microcontroller on a single chip. The ADUC836 is 100% backward....
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LED flasher circuit here will flash a LED using only 1.5 volts ?supply voltage. Normally, to make any LED lamp works, you need more than 2 volts power supply..
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This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It`s certainly not the first wireless microphone we`ve ever published but this one is a little different. It`s stereo, providing....
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The TDA7541 is a high performance Tuner circuit with stereo decoder for AM/FM car Radio It contains a mixer, IF Amplifier Demodulator for AM and FM, stereo decoder, quality detection, ISS Filter and PLL synthesizer with IF Counter on a single chip. Use of....
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Does anyone know what circuit i can use to make a dc motor randomly move backward and forward, stop for a period of time and then start again Any help and ideas will be much apreciated. Google and read about how to wire up PICs. In the simplest sense, it....
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This instrument is a computer controlled acoustical angklung designed and build in 2000. In 2006 it has undergone a major upgrade of the entire hardware. The anklungs themselves are made of hardened brass and tuned to a western scale covering two octaves.....
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This circuit enables you to display four signals simultaneously using only one channel of your oscilloscope. Essentially, it switches each of the inputs t....
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Many TOPSwitch TOP223 flyback power supply applications require two or more outputs to supply a variety of secondary circuits. Typical consumer applications of these multiple output converters include Television and related products such as set- top decoders....
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Most off-the-shelf car battery chargers cannot not be left connected to the battery for long periods of time as over-charging and consequent battery damage will occur. This add-on circuit is placed in series with the battery being charged and is powered by....
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With the comparator output driving an LED, the next step will be to sense the intensity of the LED. This lab will build a light detector circuit using an op amp and an everyday light emitting diode (LED). It`s common knowledge that when a current flows....
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The TRIAC is a three-terminal device similar in construction and operation to the SCR. The TRIAC controls and conducts current flow during both alternations of an ac cycle, instead of only one. The schematic symbols for the SCR and the TRIAC are compared in....
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This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive the motor, one for controlling the direction and the other to trigger the stepping pulses. It provides a very compact....
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I get that the LM723 current sense and current limit pins (2 & 3) see a voltage created by the very low restistance current limiting resistors and that when this voltage reaches a certain value, the IC shuts down or limits the power supply output. How or....
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The PSU you`re referring to doesn`t look extraordinarily large to me.Eagle should be able to handle this kind of dimensions. I was more looking for something that may already have the components and be more suited for this kind of design (perhaps allow you....
Water level controller circuit described here control the water level inside a tank. There two modes available with this water level controller circuit. The...
A simple whole house FM transmitter circuit diagram and description. Operating power is 1.5V battery of any type. This circuit is able to transmit at a distance of 30 meter. ....
This is the version with 3 6N11 tubes. And as far as I can see identical to the Phenix. It looks and feels very well made. The separate power supply is a bit bulky but works well and keeps the size of the main box small and cute. The on/off switch is....
Operating a stepper motor using a fixed (constant) voltage supply results in poor torque at high speeds. In fact, stepper motors tend to stall at fairly low speeds under such conditions. Several approaches can be used to overcome this problem, one of which....
Hey freinds i m doing project on RFID(Radio Frequency Identification). I m using AT89c51/52/S52 uC. I m using RS-232 fror serial communication, he....
If you`re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether someone rang while you were out. Of course, you can`t tell whether it was the visitor you were....
The Kill A Watt is an awesome product; it measures volts, amps and power factor of an individual appliance which can be used to calculate power, cost to run, etc. It`s also quite hackable. But I wanted something that would give me the same data for my whole....
This website was created to help students find idea for their project/FYP. All the content presented here are found from me, reliable blogs, website and forums. The owner of this website takes no responsibility what so ever for any of the content. If you....
This dimmer is used to adjust the brightness of incadescent bulbs (dimming) from zero to maximum. Regulation from zero is achieved using double delay circuit. The circuit is two-terminal connected and so it can be installed into switch box without modifying....
This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is nothing worse than having to find the cause of a....
I was sitting around trying to decide how to wire my fog lights up. I`ve seen people wire them directly off the low beam or....
As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET....
This is the first draft of the pH to 1-Wire converter schematic, and some of the component values are still missing. The original circuit runs on 12 VDC, but since the A/D converter IC must be supplied with 5 VDC only I want to scale down the circuit, so....
With IC SLB0586A from Siemens you can build a simple touch light dimmer circuit that will allow you to adjust the lamp intensity. Together with a TIC206D triac, it enables smooth regulation of light intensity from a bulb of 10W 400W. A coil of 100 µH/5A is....
Those wanting private listening to their music program should add this Headphone Amplifier to the Modular Preamplifier chain. The circuit was kept as simple as possible compatibly with a High Quality performance. This goal was achieved by using two NE5532....
This is a 5Volt to 12Volt DC-DC step-up (boost) converter circuitry with the intention of is especially ideal pro the USB powered applications. primarily of all a USB harbor has two current supply modes. beforehand detecting the connected device, it food....
This circuit is of an 2x 2, 500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power....
The circuit below is similar to the one above but can be used with a laser pointer to toggle the relay rather than a push button. The IR photo transistor Q1 (Radio Shack 276-145A) or similar is connected to the set input (pin 6). The photo transistor should....
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source..
Hooked up an electret mic into an opamp and gave output to my arduino microcontroller. The ADC on the microcontroller converts a range of 0 to 5 vV to a 10-bit number (0 to 1023). The problem is that the output from the latter two chips is not "clean". The....
All that remains now is for the code to be `, compiled and converted to a HEX file that the PIC can understand. This is achieved easily with the PIC compiler that comes with the PICBASIC package. The PIC is programmed with any of the parallel or serial port....
This circuit uses two comparator that are combined in what is called a window comparator, i. e. resistors R2, R5, and R10 determine a voltage window within which the voltage applied to the junction of D2 and D6 must lie in order for the outputs of IC2. A and....
This is a design circuit for scoring game circuit that can be used for all occasions when a dice is needed. The circuit is based on a NE555 timer, a 74LS192 counter, a74LS247 decoder and a & segment LED display. The timer IC1 will produce the clock for the....
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. This is the circuit quality preamplifier with built-in USB DAC for my Leachamp power amplifier. Scheme is PCM2902 datasheet.....
This analog sequencer was designed with the idea of cooperative play in mind. It can be used as a standalone instrument, or linked together with other sequencers running on the same clock speed. Mark Kleback and I were working separately working on....
As shown by the block diagrams in Figure 1, overall signal flow in this five-input mixer was minimally changed upon modification, but I added solid-state buffers that drive independent direct outputs for the five preamp channels. For each channel, the audio....
By use of transformers one can apply both voltage feedback and current feedback. There was an article in Ham Radio november 1979 by DJ2LR Ulrich Rohde giving details about this circuit. For the 2. 5MHz to audio converter the transformation ratio from drain....
Figure 36 is the circuit of a preamplifier with high impedance input and an output circuit allowing coupling to a main amplifier. It will be found extremely useful for purposes such as boosting the signal from a crystal microphone. The input socket,....
This has been the first Mosfet power amplifier of me, It is the most complete circuit. As a 60 watt power amplifier, this is sufficient for normal use in my....
This stereo amplifier is for car purpouse and can deliver up to 2 x 22W using a single TDA1557Q or TDA1553Q from Philips. TDA1557Q TDA1553Q datasheet More audio car amplifier circuits....
This circuit can be used as a small beacon or marker light, amd toys or novelty items. R1 is an LDR that has‰¥10 k © dark-resistance, or a CDS photocell. C1 determines the flash rate. ..
This power supply will work accurately where you have the need of stable 18V DC and provides current upto 1. 5A. The circuit is using a LM7818 positive voltage regulator IC. This IC has many built in features like internal current limiting, short circuit....
This is a two-zone alarm - with automatic exit, entry and siren cut-off timers. It can be triggered by the usual types of normally-closed input devices - such as magnetic reed contacts - foil tape - PIRs etc. I`ve used a 12-volt supply in the diagram - but....
Using this circuit you can convert the 12V dc in to the 220V Ac. In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer. Disclaimer All files are found using....
This circuit generates a tone that sounds very similar to a siren. The generator part of the circuit is made of the combination of PNP and NPN transistors. Toghether, the two transistors build up a free runing multivibrator. If the C2 capacitor was connected....
PWM circuits are fun. You can use them to dim LEDs, control the speed of fans and motors, control the power going to a thermoelectric cooler, or control the power going to pretty much anything you want. Just make sure that you don`t exceed the maximum....
This micro flasher circuit continuously emits flashing light with the consumption of very less power. The circuit can run for a very long time for four 1. 5 V torch cells. Here a low power CMOS IC CD4093 (IC1) is used to produce sharp pulses of 20 ms from a....
Mono high power amplifier is actually a powerful 1400 W, but if this hihgh power amplifier circuit is doubled and you want to create stereo, high power amplifier the necessary components and pcb requires two-fold. So if the stereo high power amplifier 2 X....
This is a square wave generator circuit. The main component of this circuit is the 741, a general-purpose operational amplifier. This circuit employs a single power supply Vs that can range from +5V to +15V. The square wave output of this circuit is easy to....
Metal Detector Circuit Overview The metal detector circuit is an electronic circuit that is specifically designed to detect metal that lies deep in the water...
Includes direct-coupled preamplifier and driver stages, with considerable d-c feedback to stabilize bias conditions. Voltage gain of amplifier with feedback loop closed is 10, 000. Overall efficiency is 50%. Input impedance is 10, 000 ohms and output....
A low pass filter is merely a stable state-space system that has an input and spits out an output. If the input is a quasi-periodic signal, then the output would simply be the same quasi-periodic signal with a phase shift. Only difference would be that this....
In counter mode it provides 1Hz resolution up to 100Mhz. In timer mode maximum resolution is 0. 0000001 Hz up to 1Hz. Resolution is reduced by one digit for each additional decade. Multiple frequency updates per second by employing a sliding window for....
A line follower is an autonomous bot that can follow a specific colored line painted on a surface of different contrast, such as white on black....
The basic idea is that the transmitter sends beeps and you turn the directional antenna until you get maximum signal and that is the direction of the transmitter. It doesn`t work terribly well. The reason being the antenna is quite sensitive, so even though....
The PIC32?s Analog to Digital Converter (ADC) is surprisingly difficult to set up if you re using it for the first time. Like so many of the PIC peripherals, the number of configuration options seem endless. This tutorial will help you....
The 3D printer requires separate control for three independent axis. Each of the controlled axis must have a high precision electronic driver. Mechanical part of the each axis is based on a precise bipolar stepper motor connected to a drive shaft via claw....
About the current feedback operational amplifier, even if the open-loop gain was changed, the bandwidth also will not be changed. It is often used in video signal amplificaion and the drive circuit of video cable. The diagram is a vedio inphase amplification....
This simple LED driver circuit allows us to drive up to seven LEDs by using a single NiMH (Nickel Metal Hydride) AA cell. The circuit produces voltage puls....
Older TV sets that do not have a diode split flyback usually contain a flyback that gives about 8kV peak, and a subsequent cascade which triples this to about 24kV. These cascades are moulded modules with a number of wires or solder points for input and....
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two ""1 of 8 line decoders"" (74HC138 or 74HCT138) to generate the popular ""Night Rider"" display. A Schmitt Trigger oscillator provides the clock signal for the counter and the....
This section contains intruder alarms for your home, car and motorcycle, power failure and water level alarms and even a snore detector. All circuits are listed alphabetically on the Circuit Index page and in date order on the update page. All contributors....
Here is a Flasher circuit that directly derives power from AC to give brilliant flashes at the rate of one flash per second. It uses a Diac as the main ele....
MIL-PRF-19500/543; Semiconductor Device, Transistor, Field Effect, N-Channel, Silicon, Repetitive Avalanche Types 2N6764, 2N6764T1, 2N6766, 2N6766T1, 2N6768, 2N6768T1, 2N6770, and 2N6770T1 [TO-204AE; formerly designated as a TO-3] TO-204 Flange mount.....
This is a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must....
The SM5023 series are 3rd overtone crystal Oscillator module ICs. They feature built-in Oscillator capacitors with excellent frequency response. As cutoff frequency CAN be congured by using an external feedback resis- tor Rfo, a favorable 3rd overtone....
This car alarm circuit features Exit and Entry delays, an instant alarm zone, an intermittent siren output and automatic Reset. By adding external relays you can immobilize the vehicle and flash the lights....
By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the water high sensor, whereas the longer is the water low sensor. When the water level is below....
100 MHz frequency and period counter using the Intersil ICM7226B 40-pin DIP. This circuit uses a CD4016 analog multiplexor to multiplex the digital outputs back to the function input. Since the CD4016 is a digitally controlled analog transmission gate no....
MK484 AM receiver circuit A simple AM receiver circuit based on the MK484 AM receiver IC from Rapid Electronics Ltd is shown here. MK4844 is a monolithic integrated circuit that has all the necessary sections of a AM receiver like RF amplifier, detector, AGC....
This is yet another circuit for producing DMX output for entertainment lighting from a PC. Designed with flexibility in mind, a range of circuit configurations are possible. Opting for no isolation requires just a PIC microcontroller and a standard RS-485....
Latching Continuity Tester. Source: Eldon L. Knight, Tony van Roon A continuity tester is a must on every service bench for testing cables, pcboards, switches, motors, plugs, jacks,...
CD4060 Timer Circuit 1 minute to 2 hours This is a 1 minute to two-hour timer switch. The 14-stage binary ripple counter Type 4060, IC1, has an....
The ADM660 is a charge-pump voltage converter that can be used to either invert the input supply voltage or double it. The schematic below appearsADM660 Voltage Inverter Circuit Configuration Diagram. This inverting schematic is ideal for generating a....
The ADUC836 MicroConverter is a fully integrated 16-bit data acquisition system-on-a-chip. Like all of ADI`s MicroConverter products, it features precision A/D & D/A conversion and a Flash Microcontroller on a single chip. The ADUC836 is 100% backward....
LED flasher circuit here will flash a LED using only 1.5 volts ?supply voltage. Normally, to make any LED lamp works, you need more than 2 volts power supply..
This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It`s certainly not the first wireless microphone we`ve ever published but this one is a little different. It`s stereo, providing....
The TDA7541 is a high performance Tuner circuit with stereo decoder for AM/FM car Radio It contains a mixer, IF Amplifier Demodulator for AM and FM, stereo decoder, quality detection, ISS Filter and PLL synthesizer with IF Counter on a single chip. Use of....
Does anyone know what circuit i can use to make a dc motor randomly move backward and forward, stop for a period of time and then start again Any help and ideas will be much apreciated. Google and read about how to wire up PICs. In the simplest sense, it....
This instrument is a computer controlled acoustical angklung designed and build in 2000. In 2006 it has undergone a major upgrade of the entire hardware. The anklungs themselves are made of hardened brass and tuned to a western scale covering two octaves.....
This circuit enables you to display four signals simultaneously using only one channel of your oscilloscope. Essentially, it switches each of the inputs t....
Many TOPSwitch TOP223 flyback power supply applications require two or more outputs to supply a variety of secondary circuits. Typical consumer applications of these multiple output converters include Television and related products such as set- top decoders....
Most off-the-shelf car battery chargers cannot not be left connected to the battery for long periods of time as over-charging and consequent battery damage will occur. This add-on circuit is placed in series with the battery being charged and is powered by....
With the comparator output driving an LED, the next step will be to sense the intensity of the LED. This lab will build a light detector circuit using an op amp and an everyday light emitting diode (LED). It`s common knowledge that when a current flows....
The TRIAC is a three-terminal device similar in construction and operation to the SCR. The TRIAC controls and conducts current flow during both alternations of an ac cycle, instead of only one. The schematic symbols for the SCR and the TRIAC are compared in....
This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive the motor, one for controlling the direction and the other to trigger the stepping pulses. It provides a very compact....
I get that the LM723 current sense and current limit pins (2 & 3) see a voltage created by the very low restistance current limiting resistors and that when this voltage reaches a certain value, the IC shuts down or limits the power supply output. How or....
The PSU you`re referring to doesn`t look extraordinarily large to me.Eagle should be able to handle this kind of dimensions. I was more looking for something that may already have the components and be more suited for this kind of design (perhaps allow you....
