Mini Alarm Loop v1
Mini Alarm Loop is a simple battery-powered security device to secure worthful goods outside of your home or office, such as bicycles, garden tools, furniture, etc. It sets off a sharp warning signal if severed […]
Do More with LM324 Operational Amplifier IC
After seeing an old LM324 chip-based thermostat kit in my attic, I decided it was time to whip up a quick refresher on the far-famed LM324 quad operational amplifier IC. I hope it can be […]
Poorman’s Toilet Bowl/Seat Night-Light v1
Adding something beaming will make your kid’s toilet more attractive. So, in this little post, you will see an automatic toilet bowl/seat night-light project to decorate your kid’s toilet. If you follow this minimalistic idea, […]
Door Status LED Indicator
This post shares the design idea of a simple and cheap door status display panel with tristate indicators. The tristate visual indication features three independent modes viz. steady red (busy indicator), steady green (free indicator), […]
Barn Light Watcher
If you forget to switch off the light after leaving a not often used barn, there is a strong likeliness that it might remain lit for a prolonged period of time! Luckily, it is not […]
Household 9V Battery Tester v1
The Household 9V Battery Tester presented here is not very accurate and is probably better as an estimating tool than a precise battery tester. I still highly recommend building this little project as it is […]
Electronic Chirping Cricket – STEM DIY
The Chirping Cricket presented here creates electronic cricket chirping sounds that can be used for recreational purposes or to simulate warm summer nights. It is actually a continuation of a previously published similar do-it-yourself fun […]
Another Fun Kids Noise Bomb
Fear not, the cool noise bomb featured here cannot be used to send someone into the air. But if you just want to scare your friends (or someone at a friendly gathering), this little toy […]
LED Ice Cube DIY
Like many other Chinese funny gadgets, liquid-activated light up ice cubes are now flooding our markets. We can easily buy many of them for a few bucks, but what about making similar beautiful cubes ourselves? […]
Little LED Marker Light DIY
Inspired by some commercial automotive side marker lights, I recently built a general purpose 3-LED flashing marker light. It can be used as an attention light in and around your home, especially at night. So, […]