diode

[Sax]

HelIo,

I connected the anode from a diode to the operating voltage and the cathode to a pinx. I need ground to make the diode glow.  How can this be implemented?

[Tesla DeLorean]

Well you'd need a resistor to limit current through the LED, as if you simply gate it to ground you'll get whatever the transistor will permit.

 

PINX ----[ R ]----|/|-- VCC
 LED|\|

 

Configure GPIO as PP or OD OUTPUT, LOW to illuminate

[Sax]

I already have a resistor in the hardware. Unfortunately, these settings don't work.

[Tesla DeLorean]

Perhaps draw what you've built