of the first transistor is connected to the power-on pin of the second connector, the drain of the first transistor is grounded, the source of the first transistor is connected to the gate of the second transistor and connected to the first DC power supply via the first resistor, the ...
One of those is driven by PIO0_7 and it's tied to +5V with a 1.3k resistor. Once PIO0_7 switches low the LED is on - OK.Now comes the interesting part: How can I switch this LED off? Open-drain would be the way to go, right?The LPC81XM data sheet states the following ...