-1
\$\begingroup\$

I bought a small dot-matrix board and now I am asking myself whether I need resistors for each LED or if the driver (a MAX7219EWG) supplies the correct voltage for the LEDs?

\$\endgroup\$
1
\$\begingroup\$

As per datasheet the IC can regulate the current through the LEDs by using a single resistor on the Iset pin.

So you don't need resistors for each of the LEDs but you do have to take care to select one.

enter image description here

enter image description here

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.