Here is a Simple LED Volt meter to Monitor the charge level in Lead Acid Battery or Tubular battery. The terminal voltage of the battery is indicated through a four level LED indicators. The nominal ...

This Design Idea gives two versions of an indicator light that changes from green to red as a battery discharges. There are many circuits that do this sort of thing, but all the ones I have seen are ...

The UESL End Seal Signal Light Kit provides visual warning that a heat trace circuit is energized. The NEMA 4X-rated end seal is designed to terminate one cable and indicate power with a universal ...