Circuit Lake

The Simple Wireless Security System is a security system that includes a ZigBee wireless door sensor and a PC interface. The door sensor mounts near the garage doors, and it detects the open/closed state using reed switches and magnets. The Atmel Attiny45 microcontroller fits in nicely with design because of its small size, low [...]

This ATmega32-based compact mail client project is easy-to-use and provides all the basic functionality you need to communicate via electronic mail. The project named as MiniEmail has a special stand-by mode in which it checks for new mail on a regular basis and alerts you in case new mail has arrived. Its intention is [...]

The project is an electronic version of an Etch-A-Sketch toy for kids. It can electronically emulate every function of the original. The system use Hyundai HG225504 LCD as screen which displays 256 pixels wide and 128 pixels high. Instead of a complex mechanical rail and pulley system to control the X and Y movement, [...]

This self-contained cellular automata video synthesizer project built using the Video Critter Mini, an AVR based video board that can be used to generate simple graphics on an NTSC television. You can make a complete 1-D cellular automata demonstration by adding 3 pots and a button.

The project is built for detecting human ECG (Electrocardiogram or EKG). The ECG Primer consists of 3 main parts : an extern ECG amplifier circuit for signal conditioning, the STM32 on-chip mixed signal processing peripherals for the data acquisition and the software handler for rending the ECG data and delivering ECG data to the USB [...]

The Bidirectional Stepper Motor project described here takes the principles of a current-pulse operated watch hand movement, and enables operation in both clockwise and anticlockwise directions. The system is built around microcontroller AVR ATtiny13.

Variometer is a device commonly used by pilots of various kinds of air vehicles to visualize the vertical speed. The device is of importance for the ones who want to fly without any engine like paraglider and hanglider. It help glider pilot decide whether to escape from the sink area or to start soaring in [...]