| Build a compact lithium battery health monitor that shows State of Charge (SoC) and State of Health (SoH) using colorful LED bars. Based on...
More in Circuits & Circuit Design (41)
| Tired of hunting short-circuits with a magnifying glass? This clever circuit makes locating a PCB short fast and frustration-free. Build a s...
| Never miss a blown fuse again! This ultra-simple four-component circuit ensures you’re instantly alerted when a mains fuse fails, using an a...
Members Only
| Current signals of 4-20 mA are commonly used in industrial applications to transmit process signals to controllers. Compared to analog volta...
| Discover the Mostronome, a 1975 electronic metronome that reimagined musical timing with its whistle-like tone. This vintage circuit proves...
| Do you want to power a group of lighting LEDs? Here we present a handy solution to provide extremely accurate and stable current source for...
| Monitor up to six temperature points from -240°C to +850°C with this 8051-based temperature monitor and logger. Ideal for industrial applica...
| The 2025 Elektor Circuit Special is on the horizon, and we’re looking for innovative, original circuit designs to feature! If you’ve created...
| AC-powered devices are prevalent in residential, industrial, and commercial settings. Do you want a DIY-solution for determining when a fuse...
| Check out this interesting wideband AC millivoltmeter circuit from 1990. The simple design features 12 ranges, decent accuracy, 200 µV accur...