Just when I thought I was done.
Took the schematic ... after you guys answered a dozen questions, I made a parts list.
Then I took one more look at the board and saw a resistor R7
THERE IS NO R7 IN THE SCHEMATIC !!!!!!!!
Ok, so I traced it out.
I added it in read to the schematic.
It is smaller than the rest .. maybe 1/4 Watt ... Brown-Red-Black-Brown- Brown ... or the opposite.
So 1.2K ( or 11K if I am reading it backward).
Why is it in the circuit?
Really it is in parallel with the relay ,,, and draws down the positive line to the relay and green LED.
There is a trace for it and printing on the board saying R7 ... so it was designed into it, not added later.
Just not sure if I should add it to the drawing or eliminate it from the board.
Just FYI, I am guessing the jumper is for testing ... it could be pulled to simulate the pressure switch tripping.
Thanks!
![added_resistor.jpg added_resistor.jpg](https://forum.allaboutcircuits.com/data/attachments/295/295528-702ec30dbf0da00fa449850be2a4f84b.jpg)
Took the schematic ... after you guys answered a dozen questions, I made a parts list.
Then I took one more look at the board and saw a resistor R7
THERE IS NO R7 IN THE SCHEMATIC !!!!!!!!
Ok, so I traced it out.
I added it in read to the schematic.
It is smaller than the rest .. maybe 1/4 Watt ... Brown-Red-Black-Brown- Brown ... or the opposite.
So 1.2K ( or 11K if I am reading it backward).
Why is it in the circuit?
Really it is in parallel with the relay ,,, and draws down the positive line to the relay and green LED.
There is a trace for it and printing on the board saying R7 ... so it was designed into it, not added later.
Just not sure if I should add it to the drawing or eliminate it from the board.
Just FYI, I am guessing the jumper is for testing ... it could be pulled to simulate the pressure switch tripping.
Thanks!
![added_resistor.jpg added_resistor.jpg](https://forum.allaboutcircuits.com/data/attachments/295/295528-702ec30dbf0da00fa449850be2a4f84b.jpg)