A switch is hooked up between 3V3 and pin D2. With this code the micro controller is acting as if it's a pull-up resistor and not pulldown. The RGB-led seems also to not handle this code without ...

Posted in Arduino Hacks Tagged arduino, CdS cell, light dependent resistor, M&M sorter, photocell, RGB LED, servo, stepper motor Nightmare Robot Only Moves When You Look Away October 29, 2020 by ...

If our example resistor ended in gold (orange, white, black, gold), its 39 Ohms value could be five percent higher or lower. For a possible minimum of 37.05 or a maximum of 40.95.

If you ever wanted to adjust a circuit using a digital version of a potentiometer (variable resistor) controlled by an Arduino then this is the easy way to do it - and at a price that won't break the ...