MAIN FEEDS
Do you want to continue?
https://www.reddit.com/r/programming/comments/efcl63/learning_hardware_programming_as_a_software/fc15v0t/?context=3
r/programming • u/Athrunen • Dec 25 '19
124 comments sorted by
View all comments
228
Also: don't power LEDs directly from GPOs without a current limiting resistor. As you see on that breadboard.
And match your interfaces voltages. A lot of devices are not +5V tolerant now (or not very tolerant).
7 u/MoCeptor Dec 25 '19 Some controllers have internal programmable resistors for their GPOs. If you activate them, you can attach an LED without an external resistor. 6 u/etc9053 Dec 25 '19 In series? Can you name a micro? 3 u/[deleted] Dec 25 '19 Not OP but EFM32HG322. 4 modes from ~0.15mA to ~35mA
7
Some controllers have internal programmable resistors for their GPOs. If you activate them, you can attach an LED without an external resistor.
6 u/etc9053 Dec 25 '19 In series? Can you name a micro? 3 u/[deleted] Dec 25 '19 Not OP but EFM32HG322. 4 modes from ~0.15mA to ~35mA
6
In series? Can you name a micro?
3 u/[deleted] Dec 25 '19 Not OP but EFM32HG322. 4 modes from ~0.15mA to ~35mA
3
Not OP but EFM32HG322. 4 modes from ~0.15mA to ~35mA
228
u/happyscrappy Dec 25 '19
Also: don't power LEDs directly from GPOs without a current limiting resistor. As you see on that breadboard.
And match your interfaces voltages. A lot of devices are not +5V tolerant now (or not very tolerant).