power conversion

Thread Starter

bwaley

Joined Jun 1, 2008
27
hallo! Can somebody tell me how i can convert +d.c to -d.c power.
also why do telecommunication circuits use negative d.c power?
 

beenthere

Joined Apr 20, 2004
15,819
Since the voltage readings are relative, reversing the leads should do the conversion.

Are you speaking of RS-232 protocols that use -15 volts?
 
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