The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It provides a continuous reading of series resistance in electrolytic capacitors. It operates at 100 kHz to keep the capacitive reactance factor near zero. The remaining....

One of the major problems that is to be solved in an electronic circuit design is the production of low voltage DC power supply from Mains to power the cir....

The CCD camera sensor is device that have very useful. This project has small size. But quality is a lot good. We can install with Television easily through the video in terminals. and connects to the video signal modulated to To send a broadcast RF signal....

The inverter is nice, thanks for the circuit. Please sir can you send the full function of IC1 and IC2 in this 3000W inverter circuit, to my email: sundawax@yahoo. com First of all i would like to greet you a pleasant day. Sir i am happy when found your....

Here`s an antenna selector, Preselector, attenuator, preamplifier accessory for every HF amateur transceiver. It can improve your receiver`s IP2 for out-of-band signals and yield good flexibility. My father, I4FAF (an old-timer) and I both very much like....

The original firmware is usable on the amateur radio bands, but is not very convenient to use. Wulf-Gerd, DL1FAC has developped a new firmware that is much more "ham-friendly". It is open source. With this firmware you can change the frequency as you like,....

This chapter provides detailed schematics of a variety of power supplies suitable for use with the common Ar/Kr ion tubes available to the hobbyist on the surplus market. Included are examples of commercial designs (Omnichrome 150R and 532 head, Lexel 88 and....

Project to control single phase ac induction motor in which I planned to use two IGBTs, one for switching the PWM to the motor (for AC chopping, PWM frequency is fixed @16khz) and one for freewheeling the motor. A symbolic circuit is included here: I know....

This circuit arose from the need of the author to provide a 5 V output from the 24 V battery of a solar powered generator. Although solar power is essenti....

This is a square wave oscillator (digital, like 8-bit music). It`s based around the LM386 amplifier I. C. , which is what the mini guitar amplifier was based on. It has a simple power switch connected to the battery, a potentiometer for adjusting the tone,....

This is a general purpose remote control project with using programmable PIC microcontrollers (PIC16F628, PIC16F630, PIC16F684). Schematics are shown for using infrared (IR) or radio (RF) media. If you are not familiar with microcontroller programming, you....

Using the UM3561 integrated circuit can be designed various alarm systems using few electronic parts. This UM3561 alarm electronic project require few electronic parts and is powered from a simple 3 volts dc power supply. ..

This electronic door buzzer circuit schematic has a very simple function and is very easy to build. This door buzzer circuit use a LF351 operational amplifier and other few common electronic components. When the S1 push-button is depressed an initial....

For maximum mini-security this RC Tupperware Turret packs a powerful punch. It may not have motion sensors, but food thieves will still think twice before swiping your baked goods. The 11-hour project, built by Chris of PyroElectro, was designed to be as....

High speed 0.2 to 18 GHz frequency range 80 dB isolation Non-reflective Low VSWR and insertion loss Small size, light weight...

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This fluid level sensor circuit is designed for using an ac sensing signal to eliminate electrolytic corrosion on the probes. The ac signal rectified is used to drive T1 transistor that drives a 12 volt relay, that can activate or stop some device. R2....

This is a design circuit diagram of a moderate power FM transmitter circuit. This circuit is built operation by two transistors. This is a figure of complete circuit. Operation of this circuit is explain as the voice signals picked by the microphone will be....

This ambit is a simple two transistor (2N2222) mini FM transmitter. No authorization is appropriate for this transmitter according to FCC regulations apropos wireless microphones. If powered by a 9 volt array and acclimated with an antenna no best than 12....

Charging any type of chargeable battery can be critical and involves some attention to be paid. Especially the current or the rate at which the battery is being charged becomes an important factor as far as maintaining life and efficiency of the battery for....

This FM oscillator can be used for wireless audio, microphone and part-15 applications where stable frequency modulated oscillators is needed. Lt can be va....

The circuit used for this project is really straight forward. Many would likely criticize me that I didn`t use decoupling capacitors for the LM7805 vo....

The designer of this circuit had fitted two (waterproof) loudspeakers in his bathroom and connected them to the stereo system in the living room via a long cable. Naturally, this promptly led to the desire to be able to use the remote control unit from the....

This is higher input or output for L200 voltage regulator circuit. This circuit is designed to solve the problem that occurs when the input or output voltages are higher than the device can produce. This circuit uses the external components. Here is the....

The schematic below showsthe ICL7135 integrating analog to digital converter (ADC) functional diagram. According to the datasheet, an integrating converter is the right choice for panel meters and digital voltmeter applications. It also can be used for....

From This simple projects If you want circuits with special features,can be set the program to the circuit works, when the input pluse signal is entered of....

This is a very simple AM radio circuit using only two transistors. The coil L1 and variable capacitor C1 forms the tank circuit. Transistor Q1 does the job of demodulation. The demodulated signal will be available at the base of Q1. This audio signal is....

Tried to limit the number of wire jumpers in this board but things got a little tight since I was combining the microcontroller and motor driver in one board. It would have been a lot cleaner if I would have left the programming header off. The L298N is a....

The cumulative timer circuit consists of resistor R1 and spreadsheet internal crystal oscillator BC, and it is shown as the chart. R1 and R2 choose the metal film resistors: R3 ~ R5 select the 1/8W metal film resistors. C select the aluminum electrolytic....

The antenna is simply a pair of vertical dipoles. The diodes in each dipole allows the circuit to select which antenna is active at any given time. When a positive voltage is sent up the coax feedline, diode D1 will conduct and D2 will block, making the left....

This is an enhanced version of the simple Garage/Shed Alarm. The Entry and Exit delays have been increased to about 30-seconds - and I`ve added a timed Siren cut-off and automatic Reset. I`ve also replaced the LED with an entry Buzzer. These enhancements....

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