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Topic: Resistor for AS1106 (also known as MAX7221) (Read 614 times) previous topic - next topic

mrmaster

I am having trouble finding the right resistor for my 7 segment controller. I am using the AS1106 which is identical to the MAX7221 and have 7 Segment displays that have a forward voltage of 2-2,6 V at 20mA - Now is it correct that I need a 231 Ohm resistor for them at ISET? what would be the best? Thanks for your help :)

Marc

Grumpy_Mike

It would be best to choose the closest value to this you can get and not worry about not driving the LEDs to exactly 20mA.

mrmaster

ok ... so i'll use 2 100 OHM that should be ok... thanks for your help.... ;)

Grumpy_Mike

What's wrong with a 220R resistor, that is a standard value.

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