Little LED Night Marker introduced here is a simple circuit based on the common and cheap dual-operational amplifier LM358. The night marker is in fact a safety device designed to mount near obstructions in unilluminated […]
Camper Inverter introduced here is nothing but the minimal design of a compact dc-ac power inverter built around a couple of less expensive electronic components. This little device can serve as a portable source of […]
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 […]
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 […]
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 […]
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 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. […]
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 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 […]
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 […]
