The circuit consists of ordinary components (except of ATtiny13 in some cases). The IC1 is an infrared receiver at 30 kHz. The T2 makes the switch On/Off of Media Center when it gets a High level by IC2. The K2 is connected at the “power switch” connector of your PC’s mainboard (motherboard). The two diodes [...]

There are soo much rs232 transceiver circuit which commond used for communicated between microcontroller and other devices such PC or any devices that use rs232.Here is a collection of rs232 transceiver circuits that popular for today. 2 transistor The circit below use 2 transistor and some components to provide RS232 transceiver.It usefull for cheap application [...]

It’s based on an AT90S2313 and a Dallas DS1621 Digital Thermometer. The temperature is displayed on a dual 7-segment display, and two buttons are used for setting parameters. A high current relay switches the heating element. I used an AVR 2313 as it just the right number of pins for this task. Also, it’s programmable [...]

This is a four-channel temperature measurmet adapter that works without external power supply. It will suitable for measureing temperature and logging its data with a PC. The circuit diagram is very simple and no adjustment is required, everybody will able to build it with ease. These great project created by ChaN. “I chose an Atmel [...]

L1 3 Vueltas sobre ferrite de 5x10mm L2 3 Vueltas sobre aire de 9mm (largo 10mm) L3 1 Vuelta sobre aire de 12mm L4 4 Vueltas sobre aire de 9mm (largo 12mm) L5 2.5 Vueltas sobre ferrite de 5x10mm L6 1 Vuelta sobre aire de 12mm L7 2.5 Vueltas sobre ferrite tipo HF de 10x5mm [...]

Parts: C1-C4 = 10-80pF L1 = 1 coils of diameter of 10mms, 1mm C5 = 10nF L2 = 7 coils of diameter of 10mms, 0,8mms C6 = 1000pF L3 = 3 coils of diameter of 10mms, 1mm C7 = 100nF TR1 = BLY90 C8 = 2200mF/35V A amplifier of force RF for the FM, is [...]

Simple IR Remote Control Connect this circuit to any of your home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD or DVD remote control. The circuit can be activated from up to 10 metres. The 38kHz infrared (IR) rays generated by the remote control are received by IR [...]