If you are someone who tends to use a lot of power tools, the Ryobi ONE+ system is a pretty terrific investment. Through their standard 18V battery, you can power everything from drills to ratchets to ...

Signals when an on-circuit battery is exhausted, 5V to 12V operating voltage A Battery-status Indicator circuit can be useful, mainly to monitor portable Test-gear instruments and similar devices. LED ...

Using a few diodes and a LED, you can make a nice indicator as shown in associated schematic diagram that can be used for a lot of applications (with a bit of luck). It’s quite suitable for use in ...

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 ...