I have several 'modules' that I have made with various sensors etc all feeding back to a CH1030B board which in turn activates relays via it's Darlington driver.
My problem has only just started. For some reason when I now connect the CH1030B board to the v+/v0 the normal 5.1v drops to 1.2v thus making the board useless.
I have removed the 18M2 and the Darlington chip and tested them on other project boards and they work fine but still I get this voltage drop even with the chips removed.
My question is: is there a component on the board that may have failed? if so which one?
I have tested the resistors and they seem fine. I have inspected the solder joints with a powerful magnifying glass and they seem fine.
My problem has only just started. For some reason when I now connect the CH1030B board to the v+/v0 the normal 5.1v drops to 1.2v thus making the board useless.
I have removed the 18M2 and the Darlington chip and tested them on other project boards and they work fine but still I get this voltage drop even with the chips removed.
My question is: is there a component on the board that may have failed? if so which one?
I have tested the resistors and they seem fine. I have inspected the solder joints with a powerful magnifying glass and they seem fine.