| You can build a DIY lap counter for a model race track. The number of laps is measured using an infrared reflection light sensor. The actual...
Eric Bogers (269)
| Here are, once more, a few little circuits to keep you soldering and to sharpen your experimentation skills when you don't feel like beginni...
| It's that time of year again when the leaves fall off the trees — and not just the leaves.
| Most bathtubs have an overflow pipe to prevent the bathtub from overflowing if you forget that you have opened the tap. However, disasters a...
| Before digital signal processing entered the stage, musicians had to use ingenious electromechanical contraptions to create certain sound ef...
| Here is a simple circuit that measures changes in skin resistance. You can use it in a playful way as a lie detector. An ordinary ohmmeter i...
| In today's era of digital audio and high-quality CDs, the analogue vinyl disc has not quite played the Last Post - on the contrary, the...
| For a rainy Sunday afternoon, or for one of those lockdown days when it feels like that the walls are closing in on you, small circuits that...
| Where were we before Corona turned our lives upside down and we treated you to our special summer edition? Precisely: series and parallel co...
| Many people would like to build an anemometer, but they dread tinkering with mechanical devices. Here a solid-state variant.