
Protoboard
Chrismettal/flipper-zero-backpacks
Backpack-style addon boards for the Flipper Zero!

Breakout board allowing a Raspberry Pi Pico to interface with up to two FeatherWing boards.
ProtoPropDuo is an open-source printed circuit board by DepartmentOfAlchemy, from the DepartmentOfAlchemy/ProtoPropDuo repository on GitHub. It is a 2-layer board of 98.8 × 72.3 mm with 358 parts on 56 nets, routed with 734 tracks and 65 vias.
Its parts include 165 connectors, 5 resistors, 2 ICs, 1 capacitor and 1 switch. It belongs with the interfaces and adapters and microcontroller boards boards and the RP2040 boards of this library.
Breakout board allowing a Raspberry Pi Pico to interface with up to two FeatherWing boards.
RP2040 Peripheral Usage for Feather Wings
SPI:
I2C:
| Qty | Value | Footprint | References |
|---|---|---|---|
| 174 | , , , , , , , , , , , , , , , +158 | ||
| 153 | Conn_01x01 | Department of Alchemy:Grid Hole | J10, J11, J100, J101, J102, J103, J104, J105, J107, J108, J109, J110, J110, J110, J110, J110 +137 |
| 5 | 300 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R4, R5 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2_ISO14580 | H1, H2, H3, H4 |
| 3 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J106, J112, J124 |
| 2 | Adafruit_Feather_Generic | Department of Alchemy:Feather Pins | A1, A2 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J3, J4 |
| 2 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP2, JP3 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J122 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J121 |
| 1 | Conn_01x04 | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 1 | Conn_01x05_Extra_Output | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J123 |
| 1 | Conn_01x07 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J2 |
| 1 | Conn_01x12 | Connector_PinHeader_2.54mm:PinHeader_1x12_P2.54mm_Vertical | J6 |
| 1 | Conn_01x16 | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | J5 |
| 1 | Pico | Department of Alchemy:RPi_Pico_SMD_TH | U1 |
| 1 | SW_Push | Department of Alchemy:SW_Push_1P1T_NO_RKB2SJK250SMTR LFS | SW2 |
| 1 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP1 |
| 1 | ~ | Department of Alchemy:SOP65P640X120-20N | U2 |
The 357 most common of 358 parts.

Chrismettal/flipper-zero-backpacks
Backpack-style addon boards for the Flipper Zero!

the-mad-hatters/defcon2024badge
This badge, crafted by those madder than a hatter and unapologetically heathen, is a concoction of unholy sarcasm, offensive wit, and a dash of undeniable truth.

stockmann-lab/shim_amp_hardware_linear
Hardware related to open-source shim amplifier development for MRI research

ManoShu/BareDev
ABNT2-based 70% keyboard, with a sandwich case and display stand

DD1SB/ARDF-TX
Date: 2026-10-15. Engineering review only; unbuilt and unenergized. Open RF80.kicadpro, schematic and native PCB in KiCad10.0.6. Three primary PCBs and the separate VHF true-AM design are unchanged.



It measures 98.8 × 72.3 mm and has 2 copper layers, 1.6 mm thick.
358 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the DepartmentOfAlchemy/ProtoPropDuo repository on GitHub, at the commit this page was made from: the board is board/ProtoPropDuo/ProtoPropDuo.kicad_pcb and its schematic board/ProtoPropDuo/ProtoPropDuo.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask DepartmentOfAlchemy before reusing the design.