Imagine you have a device to monitor the ups and downs in your homes electricity. This circuit is like that device, but specifically for sudden voltage spikes. These spikes can be caused by things like lightning, appliances turning on or changes in power usage. The circuit has a sensor that constantly checks the voltage. If […]
Indicator Circuits
Simple Blown Fuse Indicator Circuit with Flashing LED
Stop squinting at your fuses! This clever circuit with a flashing LED is like a tiny snitch for your electronics. Normally, the LED stays bright, letting you know everything is humming along. But if a fuse blows because of a power surge or something wonky the LED starts blinking like a disco ball. That is […]
Simple Low Battery Indicator Circuit Using Two Transistors
This post shows you how to build a tiny helper circuit for your battery powered devices. It uses just a few parts including 2 transistors to light up an LED when the battery is getting low. This way, you will know when it is time to replace the battery before your device stops working. Circuit […]
Simple Coffee Temperature Indicator Circuit
Ever burnt your tongue on coffee that is way too hot? This post shows you how to build a special circuit that tells you exactly how hot your coffee is! It uses a sensor to measure the temperature, and lights LEDs to show you if it is just right for drinking. This way, you can […]
Simple Heads or Tails Decision Maker Circuit
This circuit shows you how to build a fun electronic coin flipper. Press a button and a tiny computer chip silicon chip will instantly tell you “heads” or “tails” just like flipping a coin! What is a Heads or Tails Decision Maker Circuit: An electrical gadget called a “heads or tails” decision maker circuit is […]
Simple Car Fused Tail Lamp Indicator Circuit
This article shows you how to build a simple circuit that tells you if your cars taillights are working. It uses a special part called a resistor to check if the lights are getting the right amount of power. If a light burns out, the circuit will show a problem. This is a handy tool […]