The Round Carrier is a reference design for the RP2040 Stamp as well as a full-fledged round RP2040 dev board. You can add the Stamp to your order when buying the Carrier, or you can find it Standalone here.
The Carrier comes with a combo 3-in-1 SMD/TH/FlexyPin Stamp footprint, you can solder the Stamp directly to the Carrier, use 2mm pin headers + sockets to be able to plug it in and out, or use FlexyPins to pop the Stamp in and out of the Carrier would soldering the Stamp. This way the Carrier also acts as a great Stamp flashing and testing jig.
The Carrier extends the functionality of the Stamp by adding a ring of 16 Neopixels, an on/off switch, a LiPo connector, USR and PWR LEDs, two user buttons, and a USB Type-C connector.
You can use the Carrier in sewing using conductive thread, or using alligator clips.
By using the RP2040 Stamp Round Carrier, you get everything that comes with the Stamp itself:
On top of that you get:
If you have the LiPo and USB Type-C connected, the battery will begin charging.
The pins are not 5V tolerant.
We usually package the orders during the weekend and drop them off on Monday.