EDN

Simple Short-Circuit Detection

This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is ...
Circuit Digest

Build a Simple Optocoupler Tester Circuit for Fault Detection

Testing for failure with a multimeter is only partially effective, whereas a dedicated optocoupler testing circuit provides ...
EDN

Another simple flip ON flop OFF circuit

Figure 1 gives a simple circuit for the PUSH ON, PUSH OFF function with only a few inexpensive components. In this design, the output is connected to the input of the gadget when you press the push ...
Hackaday

New Years Circuit Challenge: Make This RFID Circuit

The Proxmark3 PCB 125kHz antenna., GNU GPL version 2, GitHub link. Picture this: It’s the end of the year, and a few hardy souls gather in a hackerspace to enjoy a bit of seasonal food and hang out.
Hackaday

How To Make A Simple MOSFET Tester

Over on YouTube our hacker [VIP Love Secretary] shows us how to make a simple MOSFET tester. This is a really neat, useful, elegant, and simple hack, but the video is kind of terrible. We found that ...