I'm doing experiments with various sensors and I'd like to build peripherals with three or four pin plugs. This is DC power (3 or maybe 5 volts) and either an analog signal or low-speed I2C. I'd like to be able to have up to 30cm or so of wiring on each side of a plug. I'm fine with building my own cables, but I haven't done it before and I'd like to standardize on something so I don't have to do it too often.

Any suggestions? I see that Sparkfun and Adafruit use 1mm and 2mm JST connectors on their sensor boards but they don't seem to have a way to plug two cables together; the connectors are on the boards.

Edit: the terminology seems to be "wire-to-wire connector" to distinguish from a "wire-to-board connector."


1 Answer 1


(This is a tentative answer; just talking about one possible solution.)

There are many connector types out there, but it seems that JST-SM connectors are pretty common? I see that Adafruit sells cables with 4-pin plugs: https://www.adafruit.com/product/578

Also, they seem quite common on Amazon. Annoyingly they tend to be sold in bundles with 15cm wires attached and sometimes I need a bit longer.

I guess I should buy some and see if it's worth getting a crimping tool.


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