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 ...

Pilot lights also known as indicator lights are used to visually display the status of machines or instruments. Most indicators favor the use of LEDs or incandescent lamps. Important specifications ...

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 ...

APEM announced the new Dual Icon series 14 mm panel-mount LED indicators, expanding its line of dual-indication operator interface products. The bi-color indicators provide multi-state status ...

You’ve got an apparently simple design requirement on your latest AC-line powered project: provide a distinctly illuminated indicator to show that the unit is plugged into the line and that power is ...