Greetings, i have four 7 segment displays which have to be configured with a pic microcontroller to show certain speeds and weight from a stepper motor and load cell... anyway for now im confused as to which resistor to choose whilst connecting to a 5v supply when using a 2N3904 transistor
is this something i have to calculate because ive seen different values on different images
any help would be great
thanks
is this something i have to calculate because ive seen different values on different images
any help would be great
thanks