Hi i accidentally reversed the input voltage on my LED panel meter and it appears that i have burnt R2 off the top left of the board. I cannot read or measure the value of it. I was wondering if someone would be able to tell me what value the resistor is so i can replace it.
Hi,
There are 2 resistors R2 on the PMLED, one is part of a voltage divider and has a value of 1K (difficult to burn with 9V).
The other one is a 20 Ohm current limiting resistor for the LED display, You can try to change this one but we are afraid that not only the resistor is damaged.
We have put the schematic of PMLED on our website so You can check it out.
http://www.velleman.eu/products/view/?id=19215#lg=1&slide=1