Circuit used for direct illumination and back-lighting of switches and buttons, improves upon low voltage neon lamps and incandescent bulbs

摘要

The light sources employed are light-emitting diodes (LEDs). The circuit is designed for operation from 60-250 V with direct connection. Compact construction and small components count, permit the circuit to be integrated directly into the switch or button, e.g. in place of a low voltage neon lamp.