Page 1 of 1

ICSP islotation

Posted: Thu Nov 15, 2018 2:08 pm
by Lord Grezington
Hello Everypne

Just a quick one, I need to use the ICSP pins for other things in my circuit. I know I need to try and isloate them. In the circuit I have a comparitor from a LM324QT opamp. Do you think it would be OK to just stick a 10K resistor between the comparitor and PIC so that there is nothing between the ICSP pins and the PIC?

Thanks

Re: ICSP islotation

Posted: Thu Nov 15, 2018 3:26 pm
by medelec35
Hi,
That is exactly what i do, use a 10k resistor to isolate external components, e.g POT's.
Of course will not be much good at low resistance sourcing and sinking, so can't power LEDs direct.
I also use a 10K from MCLR to VDD if MCLR is required.
If using a capacitor from MCLR to ground, then I would use an additional resistor from the cap to MCLR pin of about 470R.

Re: ICSP islotation

Posted: Thu Nov 15, 2018 3:43 pm
by Lord Grezington
Thanks Medelec

Re: ICSP islotation

Posted: Thu Nov 15, 2018 9:35 pm
by medelec35
Your'e welcome,
Any time.