I have a 100K potentiometer connected up across the supply of a picaxe 08m, ready to give a voltage to a picaxe input pin via the wiper. I am loath to switch it on because I cannot work out if I need to add another resistor between the wiper and input pin to limit current to the picaxe.
The potentiometer will later be replaced by a temt6000 light sensor board from sparkfun (https://www.sparkfun.com/products/8688) which uses a 10K resistor on its emitter, will that need a current limiting resistor?
Potentiometer and/or light sensor will share a supply with picaxe, very short (2") wires between picaxe on axe08 proto board, and sensor/potentiometer. Both devices potentially pass 0-5V to the picaxe.
Thanks,
Richard
The potentiometer will later be replaced by a temt6000 light sensor board from sparkfun (https://www.sparkfun.com/products/8688) which uses a 10K resistor on its emitter, will that need a current limiting resistor?
Potentiometer and/or light sensor will share a supply with picaxe, very short (2") wires between picaxe on axe08 proto board, and sensor/potentiometer. Both devices potentially pass 0-5V to the picaxe.
Thanks,
Richard