Question about NEC PS2532-4 optocouler

Discussion in 'General Electronics Chat' started by kt858, Mar 5, 2013.

  1. kt858

    Thread Starter New Member

    Mar 5, 2013
    Hi all,
    I seem to have a problem wiring my PS2532-4. I used a 5v power supply to test my simple circuit. Anode to 5v, Cathode to ground, Collector to 5v, Emitter to LED and 330ohm resistor then to ground. When I applied 5v to the anode, the LED blinked once then went dark. I tried again. this time nothing happened. Since this is a quad, so I tried another three couplers. Same thing was seen. It seems that I must have burn the circuit by applying 5v.
    Any suggestion on what I am doing wrong? I appreciate all your help.

  2. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    You need to put a resistor between the 5v supply and the anode to limit the current going through the LED portion. If you do not, as you have witnessed, you will destroy the part.