Hello,
I've been asked to order a new power supply for a device that unfortunately does not indicate the polarity of its 12V DC barrel jack. I would greatly appreciate it if someone here could help me work out the correct polarity (centre pin +ve or -ve)
I've attached a photo of the circuit board. It looks like a trace runs from the centre pin through a fuse and up to a choke coil, my very limited knowledge of electronics suggests to me that this means positive charge probably flows from the centre pin, is this correct?
kind regards,
drbob
I've been asked to order a new power supply for a device that unfortunately does not indicate the polarity of its 12V DC barrel jack. I would greatly appreciate it if someone here could help me work out the correct polarity (centre pin +ve or -ve)
I've attached a photo of the circuit board. It looks like a trace runs from the centre pin through a fuse and up to a choke coil, my very limited knowledge of electronics suggests to me that this means positive charge probably flows from the centre pin, is this correct?
kind regards,
drbob
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