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google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards

A USB-enabled STM32F042F6 breakout board
Turtleboard is an open-source printed circuit board by jeremyherbert, from the jeremyherbert/turtleboard repository on GitHub, published under the MIT licence. It is a 2-layer board of 19 × 29.8 mm with 15 parts on 26 nets, routed with 189 tracks and 11 vias.
Its parts include 4 resistors, 3 capacitors, 3 connectors, 2 ICs and 1 diode. It belongs with the STM32 boards of this library.
A USB-enabled STM32F042F6 breakout board.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 4.7u | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2 |
| 2 | Conn_01x09 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J2, J3 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C3 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3 |
| 1 | HT7833-SOT23 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U1 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | STM32F042F6Px | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_Palconn_UTC16-G | J1 |
The 13 most common of 15 parts.
It measures 19 × 29.8 mm and has 2 copper layers, 1.6 mm thick.
15 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 jeremyherbert/turtleboard repository on GitHub, at the commit this page was made from: the board is turtleboard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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