Presented here is an automatic motion sensor switch built around a cheap ‘Doppler Microwave Radar Sensor’ that can be easily used as standalone detection sensor. The circuit, designed as an alternative to the common PIR motion detectors, is perfect for DIY microwave motion sensor light switch, human sensor alarms, smart security devices, etc. The given… [Read More]
Efficient Snake Repeller
Solar electronic snake repellent presented here is a proven solution to keep all poisonous snakes out of dog kennels, stables, etc. All you need is to simply place the device on the ground to remove snakes on your property, quickly and safely. Structural details of the standalone, do-it-yourself, solar electronic snake repellent gear is shown… [Read More]
Simple DVM Voltage Reference
Validating the calibration of an electronic test and measurement instrument such as a digital voltmeter (DVM) is very crucial especially after many years of service. Nowadays, it is easy to build a compact voltage reference with the help of precision voltage reference ICs, and for high-impedance DVMs, the AD584 (http://www.analog.com/AD584) precision programmable voltage reference IC… [Read More]
Nano Digital Volt Meter
Nano Digital Volt Meter is a microcontroller-based simple DIY project for electronics hobbyists and makers. It is a compact digital voltmeter which can incisively measure input dc voltages in 0 to 55V range. The project is built around an Arduino Nano microcontroller board. Another key component is an I2C LCD panel, which is easier to… [Read More]
USB Xmas Candle
Here is a fascinating USB-powered LED Candle armed by the Digispark USB Development Board based on Attiny85 microcontroller. Thanks to Digispark – despite the lilliputian size, it’s packed with capabilities, and apart from having fewer I/O pins it can do most of what the microcontroller in the Arduino can do. Further, you can program it… [Read More]