2 layers208.8 × 396.9 mm
Ferris
pierrechevalier83/ferris
A low profile split keyboard designed to satisfy one single use case elegantly
145 parts1.3k
2 layers20.3 × 46.4 mm
GreenFox
Neofoxx/GreenFoxBoardA PIC32MM dev/breakout board
- Size
- 20.3 × 46.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 43
- Pads
- 174
- Tracks, vias
- 592, 141
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 13 Jan 2021
- Updated
- 16 Feb 2022
Overview
GreenFox is an open-source printed circuit board by Neofoxx, from the Neofoxx/GreenFoxBoard repository on GitHub. It is a 2-layer board of 20.3 × 46.4 mm with 42 parts on 43 nets, routed with 592 tracks and 141 vias.
It is built around the SRV05-4. Its parts include 8 resistors, 7 capacitors, 4 connectors, 3 ICs and 3 diodes. It belongs with the PIC boards of this library.
Main components
1README
README.mdGreenFoxBoard
This is a small PIC32MM GPM development board.
Schematic
Render
PCB
Description
This is a small PIC32MM dev board, for the GPM series of parts (aka /w USB support).
The idea is to have a board, that can be quickly used with the open-source toolchain for PIC32s.
The feature list is as follows:
- PIC32MM0256GPM036-I/M2, 2.0V to 3.6V, 25MHz max., 256kB flash, 32kB RAM
- USB-C connector
- ESD protection on USB pins
- Two LEDs, one Power, one User
- Two buttons, one Reset, one User
- Components only on one side
- Fits into 28-pin DIP socket (wide)
- Breakaway section on the PCB, with a JTAG+UART connector for easy programming
- Pin markings on both top and bottom
The JTAG+UART connector is there for ease of access. You can also score the vias with a knife, and break that part off. The JTAG+UART pins are also available on other pins, not just on the breakaway.
ICSP pins are routed to the bottom left of the board, in a standard ICD/PICkit pinout, for easy connecting.
Two crystals are present - an 8MHz one and a 32.768kHz one. Pins used for these crystals are not routed to the header pins.
USB works without any crystals - USB clock tuning on-the-go built into the peripheral is confirmed working. Tested with a modified version of m-stack.
Notes
Be careful when ordering the chips, as theee are two 36-pin namings, but one actually has 40-pins. You needs the PIC32MM0256GPM036-I/M2 version, not MV
Make sure to use the latest fersion of Progyon for programming, as it includes a fix that previously disabled JTAG pins for use during runtime.
Files
- The Gerber files are in the HW/GreenFox/Gerbers directory
- The BOM is in the HW/GreenFox/ibom directory
- The schematic is here in the root directory
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | MB_0.5mm | KiCAD library:MouseBiteHole_0.5mm | H1, H2, H3, H4, H5, H6, H7, H8, H9 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1, R8, R9 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C5, C8 |
| 2 | 27pF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C3, C6 |
| 2 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C4 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R2, R3 |
| 2 | Conn_01x14 | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J3, J5 |
| 2 | DNS | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R4, R5 |
| 2 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D3 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_B3S-1000 | SW1, SW2 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R7 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 8MHz | Crystal:Resonator_SMD_muRata_CSTxExxV-3Pin_3.0x1.1mm | Y1 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | D_Schottky | Diode_SMD:D_SOD-323_HandSoldering | D1 |
| 1 | LN1134-3.3V | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | LOGO | KiCAD library:FOX_LOGO_MASK | MARK1 |
| 1 | PIC32MM0256GPM036-IM2 | Package_DFN_QFN:QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm | U3 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Neofoxx's Library:Jing_USB_C_2_0_16pin_receptable_noSlots | J1 |
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Questions
How big is the GreenFox PCB?
It measures 20.3 × 46.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GreenFox use?
42 parts, built around the SRV05-4. 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.
Where can I download the GreenFox KiCad files?
From the Neofoxx/GreenFoxBoard repository on GitHub, at the commit this page was made from: the board is HW/GreenFox/GreenFox.kicad_pcb and its schematic HW/GreenFox/GreenFox.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the GreenFox design in my own project?
Its repository states no licence, so its author keeps all rights: ask Neofoxx before reusing the design.