

Red is Voltage, Black is Ground
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When we build up electric circuits, we need voltages.
Normally, Red cable is for Voltage, Black cable is for Ground.
There are many battery sockets selling in Akihabara, Tokyo.
Battery sockets are, Red cable is for Voltage, Black cable is for Ground.
We decide to use this rule for voltages, 3.3 Volts or 5 Volts, for our PIC circuits.
We do not confuse anymore.
(Photo AFP - Toshiki Shirose)
(Text: R.S.F. toshiki speed news press, Agence France-Presse, 6 Saturday September 2014 The Roman)