" Scematic diagram of the circuit Introduction A very simple circuit to experiment with AT90S2313, 2×16 LCD display and 4×4 keypad. The clock based on 4 MHz crystal, but you can use anyone crystal between 1-4 MHz. The keys with the name “A”, “B” … “F” are typed to the LCD with numbers 10-16. Because the"
LCD 2×16 characters & 4×4 keypad assembly example

" The microcontroller internal RC calibrated oscillator for 1,2,4 and 8 MHz speed (working with external RC up to 16 MHz  too) Analog to digital converter 10-bit (10 channels) Very high speed In"
Electronic safety-lock with telecard as key

"This door monitor project uses an infrared beam to monitor door & passageways or any other area. When the beam is broken a relay is tripped which can be used to sound a bell or alarm. Suitable for detecting customers entering a shop, cars coming up a driveway, etc. The"
Infra Red Door Monitor Project

" Serial Voltmeter Building a serial voltage meter to measure from 0 to 5 volts DC is actually pretty easy.  Using MeLabs PicBasic, and Microsoft’s Visual Basic Version 5 Pro. You need Visual Basic Pro version because you will have to use Basic’s MSComm control.  This control is not"
Serial Voltmeter using the PIC16C71

"A DC-to-DC converter is a device that accepts a DC input voltage and produces a DC output voltage. Normally the output voltage produced is at a different voltage level than the input. DC to DC converters are used to provide noise isolation as well as power bus regulation. Some of"
DC DC Converter Circuit