SparkFun Forums

[Dave36]

I have built a circuit that takes the reflection of a red dot laser and outputs 5vdc when the beam is broken. The problem I am running into is when more than one sensor is linked together. I start getting voltage to build up on the sensor output. The link below will show how the circuit is designed. I am not sure where the problems are but the circuit will work individually.

[Valen]

What do you mean with voltage build up? Where does increased voltage occur? Between which points?

Also, you experience a problem when you have multiple of these circuits connected together. Wouldn't it then be better to explain how these are connected together? Do these share the same powersource/battery? Make a schematic of the combined circuit also.