What is the status of RED and | Electronics › Electronics › Auto Cut Off Battery Charger with LM317 & BD139 › What is the status of RED and March 15, 2013 at 7:29 pm #9326 AJISH ALFREDParticipant What is the status of RED and GREEN leds? What is the voltage with refernce to ground at the point just before D3 and after D3? Make sure that you connected the zener diode in the reverse bias direction itself.
