February 2009

PIC16F84 PS2 Keyboard Emulator

Ps2 keyboard emulator with a computer circuit PIC16F84 PIC16F84 micro-controller for use with the PS2 keyboard assembly prepared with a sample project pic software. circuit given the necessary information materials..

LED Display with PIC16F84 Adjustable Timer Circuit

16f84 cd4511 decoder integrated circuit and timing controller based on the 7 segment LED display with display and buzzer sound can give warning adjustment is done with the buttons numbered..

Security Cameras for 4-Channel Audio Video Selector Circuit

CCTV system is a circuit prepared for you to monitor 4 points with a single monitor in camera security systems, there are some that are normally made without electronic circuits,..

Guitar Tremolo Effect Circuit Opamp TL072 TL071

The effect circuit is based on tl072 and tl071 opamp ICs. “rate, depth” settings can be adjusted. You can operate it with a 12 volt dc adapter. Total harmonic distortion:..

Adjustable Simple Metronome Circuit (Two transistor)

One very simple metronome circuit npn and pnp transistor and one capacitor potentiometer resistance buzzer can be connected to the audio output to speakers or headphones + 5v dc supply..

Simple Test Method for PTC Thermistors

High-power PTC thermistors PTC to test a simple practical method of this type generally used in tlevizyo and monitor control rarely fails for this reason they will not be forgotten..

Audio Video multiplexer Circuit (amplified) LM833 MAX497

video and audio distributor 6-channel audio video multiplexer circuit max497 and lm833 amplifier integrated based on the supply voltage of 12 volts dc 12v 78xx series positive regulators integrated with..

PIC16F877 Series I/O Circuit Analog Control System PLC Sampler

I/O Control analog sampler PLC system circuit is based on PIC16f877, ULN2003 is used in the outputs, and PC serial RS232 connection is provided with MAX232 integration. 32 bit windows..

Simple Logic Probe Circuit with LED Indicator Level Measurement CD4001

A simple measurement circuit designed with CD4001 (cmos nor) for logic level measurement works with 6 volts. Two 3 volt cr2032 (known as motherboard bios battery) can be placed on..

ICL7107 Thermometer Circuit (transistor sensor)

Icl7107 display driver IC Thermometer temperature sensor 5 volt supply circuit as a single source bc547b used p1 and p2 with the calibration adjustment trimpot icl7107 display two HD-A544D led..