Nano Taser
Taser™ is a weapon that fires wires to deliver a temporarily paralyzing electric shock used in many countries and by law enforcement agents. Certainly my intention is not to share the circuit diagram of a […]
Light Intensity to Frequency Converter Module
Like the ducklings followed their mother around the pond, certain electronics hobbyists are still going along with pre-wired China modules. Certainly it’s not a good habit because by taking shortcuts (even for simple tasks) they’re […]
Build Your Own 4-Digit 7-Segment LED Display Module
Here’s one simple circuit idea of a 4-digit 7-segment light emitting diode display module which can be driven by many microprocessors and development boards. I have been using it with my Arduino microcontrollers since getting […]
Pin5 and 555 – An Abridgment
Let me have my say – it’s my habit to do things over again. Not a mere repeat of anything that fitted well, but wishing to try potential betterments at slightly different angles. Confused? Sorry, […]
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 […]
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 […]
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 […]
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 […]