I am trying to debug a kit that I bought that isn't working. I am trying to test various links on the board with a an LED and resistor soldered together.
When I hit the put the ends of the LED/resistor at a point on the board with a direct link to the power supply, it lights up (so the obvious isn't a problem).
If I move my LED/resistor pair to the next in the chain, a diode I get:
(-V9) ------- (- Diode +) ---- (- LED + ) --- (Resistor) --- (+9V)
and the LED no longer lights. Should I expect it to light up, suggesting there is a problem with the Diode? Or is there something more to diode that I am unaware of (I just thought they were one-way current blockers -- suggesting the above should work).
The Diode is a TN4001. Resistor is 267Ohm. Foward voltage on the LED is
3.7.