the a old circuit a sensor of present area (block)
The circuit a “kit” of Radio Shack store. I check a local store .
You a circuit and part list and circuit , i buy the part are wire the sensor.
I new you help.
Ray,
Your old R/S circuit - is it an IR sensor, or a light sensor? Without a good circuit diagram, this may be a lost cause. If it is indeed the sensor, R/S no longer stocks it?
Jim