PIC16F627 Countdown Timer

This project it is based around a PIC16F627 micro and It is build as a countdown timer for a UV exposure box for PCB development that uses fluorescent UV lamp with following features:

Adjustable time in 15-second increments (up to 10 minutes)
Lamp preheat feature
Two button operation (with audible feedback)
Countdown alarm (when timer reaches zero)
Relay for [...]

CNC Driver with PIC16F870

This driver may be used for a 3 Axis CNC Machine. Based on the PIC16F870, for 3x Unipolar(5, 6 or 8 wire) Stepper Motors. It provides Full Stepping for good torque, with ability to toggle auto-shutdown of motor coils, which allows the motors and current regulation device to run cooler and require a lower output [...]

ATMEGA8 Development Board

This development board is perfect for all the newbies that want to learn about AVR Microcontrollers or want to build some nice projects with it.
ATMEGA8 Development Board contains:

ISP programer
RS232 comunication (serial port)
High Power Voltage control
ON/OFF Circuit
All pins are marked
PC power jack

Source: Pop Gheorghe

Automatic Phone Recorder

How many times have you wished that you recorder your recent telephone conversation? I have, many many times. So thanks to [Trax] that he finally decided to make this happen by using PC and a piece of hardware (powered from USB) to record audio from phone line to MP3 format. He wanted this thing to [...]

Universal PCB for PSU with 78XX Family regulators

The 78xx family is a very popular choice for many electronic circuits which require a regulated power supply, due to their ease of use and relative cheapness. When specifying individual ICs within this family, the xx is replaced with a two-digit number, which indicates the output voltage  the particular device is designed to provide (for [...]