These adapters are super-handy for wiring
your own power source to a DC barrel jack 2.1mm tip. Simply secure your power
source wires to the terminal block end, then plug the barrel jack side into the
'thing' you want to power .
The terminal block has the polarity labeled,
which assumes a center-positive tip (most barrel jack PSUs are center-positive,
but always check first!)
We also offer a version with a female tip.
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