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 [...]

The Plant Minder manages the watering process for an indoor plant. It monitors the moisture content of the soil using several capacitive sensors, and controls the speed and running time of a low volume pump to drip-water the plant from a water reservoir. It automatically adapts the pump run time to the soil conditions, [...]

The purpose of the high altitude rocket telemetry payload was to design and develop a flexible flight computer to be flown onboard reusable mid and high powered model rockets. Since these designs are to be flown on relatively small rockets, size and weight were of paramount importance to the payload developed. At the same [...]

The project shows you how to build simple breathalyzer, an alcohol meter device for estimating blood alcohol content (BAC) from a breath sample. With this information, the application is able to determine if you may drive or not.

This low cost motion sensor named is mOtiOn. It is built based on real time processing of a video signal using analog preprocessing and optimized image processing algorithms in an AVR ATmega88 microcontroller.

The goal of the project is to design and build an AVR ATtiny26L microcontroller-based model railroad car that helps locate and diagnose problems with your layout and track in order to improve the overall running performance of your model trains. The Diagnostic Track Inspection Car operates as it is pulled around the layout with a [...]

The purpose of the project is to monitor and display the water level in a 3000 gallon septic holding tank. The system consists of two main parts: the sensor unit and the display unit.