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 ...

APEM's Dual Icon indicators use green and red filters combined with vivid LED lighting to produce a 120° viewing angle.

APEM's two-icon panel-mount LED indicators are available with standard and custom illuminated bi-color graphics, providing a ...

The Dual Icon 14 mm panel-mount LED indicators from APEM are bi-color indicators designed to provide dual-state visual ...

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 ...