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 […]
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 […]
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 […]
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, 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 […]
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 […]
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 […]
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. […]
As mentioned in my previous post, some analog multimeters offer the hFE test feature via a custom-made hFE connector that is usually sold as an optional accessory. The popular Sanwa YX-361TR analog multimeter is a […]
If you often drive early in the morning or at night, you spend most of your time in a dark vehicle, and at that time a small interior/dome/cabin light becomes an indispensable widget if you […]
Recently, I wanted to try an electronic scarecrow in my lab window to scare off some birds (often nocturnal) that make a lot of noise and dirt. Although there are many options for building one, […]