Dual polarity wave generator for SCR switching and operation of a relay.

@ShreepatiBehera

5 years ago

https://everycircuit.com/circuit/5635524999249920

Components IC 555 , Tr BC547, BC 557, 3 nos. 1K, 1 no.100 , C 1 micro F, 47 micro F, relay , 2 LEDS