HIGH and LOW 18 and 40x2 chips

[mymps3]

Disregard this post. I was losing my mind




Am I going crazy but are HIGH and LOW opposite with these 2 chips.

Examples LOW 1 (makes led go OFF on 18x)

LOW1 (makes led go ON on 40x2)

I'm using common ANODE RGB led's

Many thanks!!!!

 

[Jack Burns]

It all depends on how the LED (with resistor) is connected...

Direct picaxe connection:
a) Connection between picaxe and +V will require a LOW 1 to turn the LED on.

However, if you're using a project board which has a darlington driver, then the output will be inverted, so the following applies...

Darlington driver output:
b) Connection between darlington driver output and +V will require a HIGH 1 to turn the LED on.