Variable delay with variable resistor

Thread Starter

john121

Joined Jun 4, 2012
1
Hi every body,I want to adjust the delay with a variable resistor used with PIC16F877A ,I use CCS C compiler dor codes editiing.
Can you please help me to generate the codes,see for example:


with a variable resistor of 47Kohm

As the value of resistor increases the delay(in ms) also increases;

Thanks!!
 

mcgyvr

Joined Oct 15, 2009
5,394
Hook the variable resistor to 5V..read the output with an ADC port. Use that value to create your delay.
 

MrChips

Joined Oct 2, 2009
19,270
You could put the R in an RC circuit connected to an I/O pin.
Then use this to create an RC discharge to time your delay.
 

Ron H

Joined Apr 14, 2005
7,012
Hook the variable resistor to 5V..read the output with an ADC port. Use that value to create your delay.
To clarify a little:

Hook one end of the potentiometer to +5V and the other end to ground. Read the wiper with an ADC port. Use that value to create your delay.
 
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