when I test the diode, i get a reading on both ends...meaning when I flip the + and - on the multimeter i get a reading of like 200ohms either way...when I take the diode out of the perf...the reading is normal again...the diode works.
how separate are you supposed to keep the ground from a 12v psu and the regulated current from a 7805?
can the arduino and other components take the ground from the 12v psu?
is there an order of the pins? l
I have the same relay on a breadboard and in a perf board and it seems to be soldered together the same way. When it is in the breadboard, the relay and diode on its coil works.
any other trouble shooting approaches?
if i just have the anode connected to he coil, it works...if just the cathode is connected...it works...but as soon as both are connected...it stops working...but in the same breadboarded circuit..no problems.