I am using JST SM connectors for connecting two sets of wire. There are two slots in 2-pin connector. I wish to know, what is general convention for assigning the polarity to these slots? Is it slot 1-ground & slot 2-Vcc or slot 1-Vcc & slot 2-ground? Also how should I assign these slots for control pins(like clk/sw/sck)? Is there any uniform convention? And what is general assignment of slots in case of 3-pin connector? I have attached an image of the connector with visible slot numbers. Any Help is appreciated.
Surely the standard has already been set by the battery manufacturers? I have many toy 4.8v NiCd battery packs wired with pin 1 Vcc and Pin 2 ground. Using these as stand-alone plugs and sockets there is no problem, but wishing to use one of these pre-wired battery packs, it becomes important.
I spent some time looking too (in my case for a JST XH 2-pin battery connector polarity standard). Did not find any standards/conventions.
- Batteries from different manufacturers (in my case 1-cell LiPo batteries) use different polarity.
- Connectors sold separately (with attached wires in the male connector) also use different polarity depending on the manufacturer.
If you are making a PCB, try to indicate in the silkscreen of your board the connector polarity (i.e.: where "+" and "-" go) to make it clear for anybody (and for you when you forget in in the future).