How to use pull-ups to build muscle at home, even if you can't do any, according to a personal trainer. By Gabby Landsverk. Solskin/Getty Images 2021-12-04T12:45:00Z ...

Without a pull-up resistor the attached devices will never register a high state. We can feed any voltage into the pull-up resistors that the Bus Pirate will tolerate, so we can use this mode to ...