I have just build a Velleman dice circuit (see attached). I would like to use this circuit to run some very large dice for a charity event. So therefore need big lamps. I have decided to use these - http://www.ebay.co.uk/itm/290732266...X:IT&_trksid=p3984.m1423.l2649#ht_3483wt_1180
As an experiment I have removed 1 led from the circuit board and fitted a 4N25 Optocoupler as I had one lying around. I then attached a 12volt supply through the emitter/collector and then onto a similar LED bulb as above. The flashing of this 12volt LED is fine and it doesn't seem to effect the circuit, however when it is supposed to be off for example when the dice rolls 1 it still has a very small glow.
Is this optocoupler wholly suitable or should I opt for a MOC3021 or similar? Is there anything else that perhaps needs changing such as the resistor ratings?
Hope this all makes sense.
As an experiment I have removed 1 led from the circuit board and fitted a 4N25 Optocoupler as I had one lying around. I then attached a 12volt supply through the emitter/collector and then onto a similar LED bulb as above. The flashing of this 12volt LED is fine and it doesn't seem to effect the circuit, however when it is supposed to be off for example when the dice rolls 1 it still has a very small glow.
Is this optocoupler wholly suitable or should I opt for a MOC3021 or similar? Is there anything else that perhaps needs changing such as the resistor ratings?
Hope this all makes sense.