On the first electrical system check I think I fried the RFID. Got a bit cocky with the wiring by running 2 feeds into one (one from the RFID and one from the LED switch) and I think some current went back up into the RFID and fried it.
So I decided to simplify the wiring a bit and wanted to go the extra step and stop any potential bleed back into the RFID. I thought I would step into something I've never done before: electronics!!!
So I bought some diodes and thought I would try out on the broken RFID first:
I have no idea which way it goes around so I put it on the tester:
I'm assuming the flow goes from the red to the black side (with the black stripe on it).
The white wire was the one I had joined with the LED switch:
I had a look at the board and tried to determine a good place to install the diode, it appears the pin on the left is the trigger feed, it was soldered to the right pin where the feed wire connector joins:
I thought the neatest way of doing it was to remove the pin on the left, solder in the diode wire and then solder it to the pin on the right. A little solder action and the pin slid right out:
Putting the diode in required a little finesse but it worked out in the end:
I'm happy with the test (although i want to solder the diode in a little neater) and will be doing the unbroken RFID in the next day or so
Can anyone confirm I've tested the diode correctly?