I'm installing a outdoor video security system. I've come into a
problem. All the components are 12v except for one, that is 24 volts.
I have a transformer in my basement that is supplying the 12 volts
via a burried cable. Can I produce 24 volts by combining two 12v
wires in paralel? I don't want to have to use a transformer. Will
this work. ? Thanks
Are you talking AC or DC here?
If AC, you can get double the voltage on the output by combining the
output secondary leads in series (not parallel). The transformer
connections have polarity themselves so you have to wire them
correctly or you will get close to 0 volts on the output. The effect
is similar to a center tapped 12/24 VAC Transformer except the coils
are physically separated. Of course, if this is AC, you can just
simplify your life and use a 12/24 VAC step-up transformer.
If this is DC, then you would might be faced with a bipolar grounding
issue. If you put two 12v DC supplies in series for 24 VDC then your
common connection is + -. Might be a problem if one side of either
12 V. supply is already grounded. It might cause a regulation
problem. It's probably not a good idea to tie the supplies together
A far better and more common solution is to use a DC to DC convertor.
They are readily available to convert 12 VDC to 24 VDC and you can get
them in a range from 2 to 150 watts. Make sure your 12 V. supply can
take the increased current and also your cables. Category 5 cable is
limited to about 15 watts or so.
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