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 [...]