Andy Burns wrote:

Roger Hayter wrote:

Andy Burns wrote:

https://www.maplin.co.uk/p/twopin-qy83e

I'm sure you've got the right LED. Are you sure you're identifying
pins 2 & 4 correctly, along the side of the connector rather than across
it?

Well depends which way round you're viewing it, but the ones identified
in green as per this diagram.

http://www.fixya.com/uploads/images/B9BFA92.jpg

The disk LED, reset and power switches function OK.

I agree then that from your measurements the board simply doesn't do
what it says it should.





I've got that wrong more than once before. Pins 2 & 3 should give
the readings you describe in your other post. That is, the second row
*across* the connector.


--

Roger Hayter