SO..... There is this basc resistor / resistance deal I never really understood... AndI hoping someone can just answer the question and not tell me over and over what ohms law states. But since I know that'll happen, Here is the setup:
I have this system that has a processor and a multiposition switch. Inside the switch are 5 resistors, depending on what switch you press, current from the processor flow through a different resistor. Inside the processor (this is all speculative since I cant open it up) is a 5V pullup and an ADC to read in the voltage. The ADC does NOT read the return wire from the switch. The swtich is grounded where it is. So that there is one 5V signal wire coming from the processor to the switch.
Now... When pressing the switch you can dmm the signal wire and watch it go from 5V to 4 or 2 or 1 or .5 or 3.5 etc etc (depening on switch possition).
Now when ' I ' take a 5V source and put it through a resistor, the voltage never drops, just the current.... What is going on here ?
I have this system that has a processor and a multiposition switch. Inside the switch are 5 resistors, depending on what switch you press, current from the processor flow through a different resistor. Inside the processor (this is all speculative since I cant open it up) is a 5V pullup and an ADC to read in the voltage. The ADC does NOT read the return wire from the switch. The swtich is grounded where it is. So that there is one 5V signal wire coming from the processor to the switch.
Now... When pressing the switch you can dmm the signal wire and watch it go from 5V to 4 or 2 or 1 or .5 or 3.5 etc etc (depening on switch possition).
Now when ' I ' take a 5V source and put it through a resistor, the voltage never drops, just the current.... What is going on here ?