Help with resistor

Thread Starter


Joined Oct 17, 2013
Hi all, i am doing a little mini home project and have got little idea of where to begin with the resistor i need.

I know i need something similar to this...

The issue is, i want to run a few of these and identify which one is sending me a signal, that means i will need some way to assign the sensor an id.

Any idea if there is such a thing - or can i add my own chip somehow to give it an id or what not

thanks for your help


Joined Aug 23, 2012
If you want to using the uC to input the signals from the sensors, maybe you could doing like this:
8 sensors → LM324*2 8 comparators → CD4051 → uC.

1. Assuming that you have 8 sensors, and you give each sensor an ID from 1 to 8.

2. Using two LM324 Op Amp as 8 comparators, and setting the Vref(Voltage reference) to detecting the sensors from 1 to 8.

3. Using the uC to selecting the output results of comparators from 1 to 8.

It just a thought, so maybe you need to modify something.