Hi there,
I have an old Marconi spectrum analyser and one of the optical encoder controls has died. It has a pair of ir LED emitters and a corresponding pair of detectors type VTIC7210, which according to the circuit diagram are ir schmitt-trigger detectors, TTL compatible. As far as I can tell, one of the detectors is stuck low.
From google, I can't even determine the original manufacturer, never mind find a data sheet. I'd be glad if someone could point me in the direction of a data sheet so maybe I could decide on a substitute part, or even a vendor who would sell me a few ?
Thanks and regards
I have an old Marconi spectrum analyser and one of the optical encoder controls has died. It has a pair of ir LED emitters and a corresponding pair of detectors type VTIC7210, which according to the circuit diagram are ir schmitt-trigger detectors, TTL compatible. As far as I can tell, one of the detectors is stuck low.
From google, I can't even determine the original manufacturer, never mind find a data sheet. I'd be glad if someone could point me in the direction of a data sheet so maybe I could decide on a substitute part, or even a vendor who would sell me a few ?
Thanks and regards