LED Outputs on cypress

KRibordy · #1 22-03-2010, 17:55

We'd like to have an LED output on the cypress to let us know when the kicker is wound. We have the software setting digital output to 1 when the kicker is wound up, but I don't know how to connect the LED to the cypress to allow it to turn on when the digital output is on. Would we connect the LED to the digital output 1 pin and power? or the output pin and ground?

Thanks in advance!

Zme · #2 25-03-2010, 10:33

my thought would be digital output to ground since the digital output, when true, would "give out" power, make sure that the led is in there the right way though,

eugenebrooks · #3 25-03-2010, 22:07

Generally, you want to use the digital output to sink current
through the LED which is hooked to the supply rail on the
Cypress through a resistor used to limit the current. You
turn the led on by sending zero to the output.

Eugene

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