After ordering a board panel, I’ll whip together a tester shield. This will go on a Metro M0 (SAMD21) running our stand-alone UPDI programming code. The mounting holes on the breakout become the tester jig alignment holes thanks to some standoffs. Then we just have oval pads for securely soldering the pogo pins. Note the p-channel FET on the VIN pin, we use that to power cycle the board when testing the address pins since they’re sampled on boot only.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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