Hi,
Can you verify how you have the LED connected on the protoboard.
In you picture it looks like you have positioned so both its pins are shorted at pin3 of the 4427.
Shouldn't the resistor and diode connection be on a separate row?

Tom... ![]()
Hi,
Can you verify how you have the LED connected on the protoboard.
In you picture it looks like you have positioned so both its pins are shorted at pin3 of the 4427.
Shouldn't the resistor and diode connection be on a separate row?

Tom... ![]()