I needed a simple LED indicator showing that a particular voltage level had been reached—specifically, that a capacitor had charged to a particular potential. I was convinced that there must be a way ...

Heya -- Just bought a TerraMaster F4-423 NAS to replace my "old desktop as a server." The NAS comes with two 2.5GBe ports. When I plug either port into a 1GBe switch, the interface LED indicator ...

Ergonomic and compact, with a technopolymer certified self-extinguishing UL-94 V0 body and a monostable safety switch that ensures proper interruption of the power supply circuit, the new M.2000-SWM ...

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 ...