Flickering Torch Bulb
What is the simplest circuit you can think of for building a flickering torch bulb or torch bulb flasher/blinker? How many components do you need? This little circuit uses only a few common components, no […]
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 […]
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, […]
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 […]
Steady Hand Game – STEM
Steady Hand Game, also known as Buzz Wire Loop Game is a tabletop game which involves guiding a metal ring (the wand) along a serpentine length of bare wire (the loop) without touching the wand […]
Touchless Live Wire Detector – STEM Fun
This post explains how to make a simple touchless live wire detector that can be used to find hidden electrical wiring in a wall or ceiling. This battery powered tester is actually a very simple […]
Photosensitive Bristlebot – STEM Edition
Bristlebot is a great easy way for kids to start to learn basic electronics. Bristlebot is perhaps the simplest form of a walking robot with a rigid bristle toothbrush body. It seems simple, a Bristlebot […]
Handy Test Light (v1)
Get ready to make a high-resistance continuity tester pen that runs on a pair of common 1.5V AA batteries. This design is based on an idea from a Chinese website but with a few modifications. […]