Reply To: Mayfly v 0.4 or 0.5?

I got that connector from All Electronics: https://www.allelectronics.com/item/con-242/2-pin-connector-w/header-.10/1.html

Any 2-pin header with standard 0.1″ (2.5mm) spacing will work, though I prefer the ones from AllElectronics because they’re polarized and come with the prewired matching cable with 8″ leads. They’re made specifically for that company, so you can’t find them elsewhere.

Otherwise, you can use a basic Molex 2-pin polarized header, but then you’ll also need the mating jack and crimp pins.