Digistump Forums

The Digispark => Digispark Projects => Topic started by: ligi on February 10, 2016, 04:52:41 pm

Title: overcome pull-up on p3 to use mosfet driver board
Post by: ligi on February 10, 2016, 04:52:41 pm

I have a MOSFET Driver board attached to the digistump - it works fine for P0..P2 - unfortunately I have a problem with P3 - in the docs I was reading:

Quote

Pin 3 (P3) has a 1.5 kΩ pull-up resistor attached to it which is required for when P3 and P4 are used for USB communication (including programming). Your design may need to take into account that you'd have to overpower this to pull this pin low.

unfortunately I don't know how to overcome this pull-up resistor - I am better with code than with electronics ;-)

this is the MOSFET board:

https://www.pollin.de/shop/downloads/D810329B.PDF

any pointers on how to overcome the resistor?

context: will be for this project https://github.com/ligi/BlowerControl

Title: Re: overcome pull-up on p3 to use mosfet driver board
Post by: ligi on February 11, 2016, 11:31:39 am

Thanks - it was a wiring error and I thought it came from the pull-up - works fine now ;-)