These are great things to have on hand if you're doing home projects with a mini processor like the Arduino or Raspberry Pi. You can use them for prototyping and/or final design. They're just wires with a jack on one end and a jack on the other. They are ideal for connecting plug contacts to pin contacts on various sensor and actuator boards. I bought one of these, a set of these female to male and female to female connectors, just to have on hand and I've used a surprising number of connectors. She.
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