If you’re working with 3.3V or 5V circuits, it’s easy for you to throw on a power or status LED here or there. [Tom Gralewicz] has found himself in a pickle, though, often working on projects with ...

This LED DC voltage indicator circuit is a voltmeter, rather than simply a battery tester. As such it may measure voltages as low as 3V. It utilizes venerable LM741 operational amplifiers applied as ...

If you are experiencing issues with your ASUS PC, you can troubleshoot the problem by viewing the status of the Q-LED indicators. This article shows how to troubleshoot ASUS motherboard with Q-LED ...

This is a 1.2 – 12 V, max 1A power supply with a low voltage indicator LED. The indicator part includes three diodes and one LED. For example you are charging a battery, you can observe the charge ...

The new 24 page color catalog features their complete LEDCO product line of high quality LED, neon and incandescent indicator lights. The catalog is an easy-to-use reference for sourcing industry ...

The QRM Series, rear-mounting LED indicators from APEM Inc. is suitable for a wide range of applications, from heavy machinery to military devices, and the QRM-NV series, including night vision (NVIS) ...