Description The Adafruit FeatherWing Doubler is a FeatherWing prototyping add-on for all Adafruit Feather boards. Compared with a single Proto FeatherWing, the Doubler gives you two side-by-side Feather-compatible positions, so a Feather board and another FeatherWing or prototype circuit can be tested at the same time. This FeatherWing Doubler prototyping board duplicates every Feather pin, cross-connects the two pin sets, and adds plain proto grid space for custom wiring. Full connected GND and 3.3V pad strips make power distribution easier for lab builds, classroom experiments, maker-space projects, and portable Feather prototypes. The kit is passive and does not include a microcontroller. Pair it with a compatible Feather board such as the Adafruit ESP32 Feather V2 when a project needs more wiring room or a second FeatherWing position. Features Two Feather-compatible positions for side-by-side Feather and FeatherWing prototyping. Duplicate breakout rows for every Feather pin plus a general-purpose proto grid. The two pin sets are cross-connected; GND and 3.3V use full connected pad strips. Mini kit includes the PCB, Feather stacking headers, and Feather female headers. Headers can be soldered for the desired stack height and trimmed after soldering for slimmer builds. Useful for prototyping, testing, education, and fast hardware iteration in the Feather ecosystem. Specifications OpenELAB SKU Adafruit-2890 Official Product Name FeatherWing Doubler - Prototyping Add-on For All Feather Boards Product Type FeatherWing Prototyping Add-on Compatibility All Adafruit Feather boards and compatible FeatherWings Slots 2 x side-by-side Feather-compatible positions Proto Area Plain grid with duplicated Feather pin breakout rows Power Pads Connected GND and 3.3V pad strips Dimensions 50.9mm x 47mm x 1.6mm Weight 6.7g Assembly Mini kit, soldering required Applications Side-by-side tests with one Feather board and one FeatherWing. Feather prototypes that need extra wiring, measurement, or component space. Classroom, lab, maker-space, and quick hardware iteration workflows. Portable prototypes where a breadboard should be replaced by a more stable PCB. Product List 1 x Adafruit FeatherWing Doubler PCB 1 x set of Feather stacking headers 1 x set of Feather female headers Feather board, FeatherWing, and additional components are not included Other Content The official view shows how the Adafruit FeatherWing Doubler combines two Feather-compatible areas on one prototyping board. The bare PCB view shows the proto grid, duplicated Feather pin rows, and connected power pads. The kit includes the headers needed for female or stacking installation, depending on the build. In side-by-side use, the Feather board and FeatherWing remain easier to wire, inspect, and measure than in a tight vertical stack. Resources Official FeatherWing Proto and Doubler downloads Adafruit Feather specification Adafruit FeatherWing information FAQ Is a Feather board included?No. The kit includes the FeatherWing Doubler PCB and headers; Feather boards are selected separately.Why does it have two positions?The two cross-connected positions let a Feather board and FeatherWing sit side by side for easier testing and wiring.Does it require soldering?Yes. The headers and any custom components must be soldered for the selected layout.What power pads are available?GND and 3.3V are provided as connected pad strips across the board.Does it work with all Feather boards?Yes, it is designed for the Adafruit Feather form factor and compatible FeatherWings.
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