Grey Tracker (v1)
Grey is the neutral achromatic color midway between white and black – Am I right? If you want to make something of yourself to detect the grey, let me give you a cheap and cheerful idea. […]
DC Voltage Booster/Multiplier
Do you like the idea of high-voltage electronic sparking devices, but don’t have the time or patience to learn the complex theory? Here’s a simple tutorial that can help you to make many high-voltage projects […]
USB LED Flashlight
USB LED Flashlight presented here is a simple do-it-yourself rechargeable flashlight with built in rechargeable cell, cell charger, white light source, and a standard usb interface for overnight charging. Since the design is based on […]
PWM to Voltage Module (v1)
Late month I’d got an order from my neighboring client to build a pulse width modulation to dc voltage converter module that’s compatible with common microcontrollers and PLCs. Since it’s a fussy time for me […]
USBtinyISP Primer
While Googling for nothing, I noticed a little device “USBtinyISP” helpful for programming Attiny85 microcontrollers using the same setup method as for handling Arduino sketches. There’s also no difference in the development environment as we […]
Loafer’s LED Wick
May it be a surprising title – Loafer’s LED Wick! Let it be, the article is nothing but the design idea of a little LED light based on Joule-Thief concept. It’s true that by a […]
Simple Thermostat for Electric Geyser
Here is a simple yet highly reliable thermal control circuit which can be used with almost all electric geysers. The Arduino microcontroller based circuit switches an electromagnetic relay on or off according to the temperature […]
Breathing New Life into BLDC Motors
It’s damn sure, there’s plenty of old optical and magnetic disc drives (CD/DVD/HDD) in every electronics/hardware hobbyist’s junk box. Sadly it’s known to few people that such disc drives are rich and cheap sources of […]
Over Voltage Protector (OVP) Switch
In yesteryear I’d designed and developed an AC230V over voltage protector switch based on the popular PIC microcontroller PIC12F675 (shown below is the photo of that prototype). The electronic switch can be used to safeguard […]
Optical Smoke Alarm
Optical smoke alarms, also known as photo-electric smoke alarms, are particularly useful in bedrooms, lounges, hallways, and in other areas where we can otherwise expect false alarms from the common ionization smoke alarms. An optical […]