Am off/out of town for 2 weeks will check it upon return. Phototransistor an unmarked ebay item but they work. Output of phototransistor alone (at about 14 v as I recall) insufficient to activate the interface input, hence the transistor in the circuit.Will measure current in the input line upon return. Acces provides the attached input circuit.
thanks,
Burt

 

Am off/out of town for 2 weeks will check it upon return. Phototransistor an unmarked ebay item but they work. Output of phototransistor alone (at about 14 v as I recall) insufficient to activate the interface input, hence the transistor in the circuit.Will measure current in the input line upon return. Acces provides the attached input circuit.
thanks,
Burt

Perhaps when you return you can tell us why you posted this. Do you have a question?

 

Sorry, it was in response to on-going dialog, must have hit the wrong button.