Electronics > Beginners
Question on cheap lcd panel meter.
StillTrying:
From the 2 images in the 1st post it must be like this. ( but don't blame me if it blows up! )
The current measuring shunt being in the ground line can be a bigger problem than supplying 4-30V to the thin red wire.
sureshot:
Yes I was thinking of a dropping resistor for the fan from the rectified filtered input, but a 7812 is a better option. I'm going to try that with the meter added sourcing its power. Then wire up the rest of the meter for sense and current measuring. If it goes pop, or starts acting up I will go with a buck converter from the input, or maybe even a separate small chassis mount transformer. The meter is said to use less than 20mA for its current. It will come together somehow. Thanks for the help from everyone, appreciated.
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