2 layers69.5 × 98.3 mm
Floppy Board v3.0
FloppyO1/Floppy_Boards
Floppy Boards are a series of breakout boards for rapid prototyping which I developed as an alternative of Arduino.
208 parts5CERN-OHL-S-2.0
2 layers65.5 × 98 mm
Floppy Board v3.1
FloppyO1/Floppy_Boards5Floppy Boards are a series of breakout boards for rapid prototyping which I developed as an alternative of Arduino.
- Size
- 65.5 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 339
- Nets
- 37
- Pads
- 958
- Tracks, vias
- 2,148, 372
- Pours
- 1,548
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 17 Sep 2023
- Updated
- 1 Nov 2026
Overview
Floppy Board v3.1 is an open-source printed circuit board by FloppyO1, from the FloppyO1/Floppy_Boards repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 65.5 × 98 mm with 339 parts on 37 nets, routed with 2,148 tracks and 372 vias.
It is built around the CH340N, AT24C32N and H7233-1, with the SD103AW among its other parts. Its parts include 54 capacitors, 42 resistors, 30 diodes, 24 ICs and 24 connectors. It belongs with the STM32 boards of this library.
Main components
4
CH340N
SOP-8-20℃~+70℃ 1 2Mbps 3.3V、5V USB 2.0 USB to serial SOP-8 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
AT24C32N
DIP-8-40℃~+85℃ 1,000,000 cycles 1.8V~5.5V 100 Years 10ms 32Kbit 400kHz Hardware write protection function、Noise suppression function、Page write protection function I2C DIP-8 EEPROM ROHSHGSEMIEEPROM
H7233-1
SOT-89-3-40℃~+85℃ 1 15V 170mV@(100mA) 1uA 3.3V 400mA 40dB@(1kHz) Fixed Over Current Protection Positive SOT-23-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSShanghai Siproin MicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SD103AW
SOD-123Schottky Diodeshongjiacheng
README
README.mdFloppy_Boards
Floppy Boards are a series of breakout boards for rapid prototyping which I developed as an alternative of Arduino.
These boards can provide good performance and many useful modules (such as: USB, I2C, SPI, timers etc.). I want to make several models, in order to have different boards for different applications. For example, I am considering developing options for:
- Built-in battery monitoring & charging. (to be done)
- Built-in DC motor control. (to be done)
- Built-in servos & stepper-motor control. (to be done)
Why as an alternative to Arduino boards?
I am building this board because I was looking for a cheap, powerful and well supported development board in the marketplace, but I don’t find anything I like. On the other hand, I am learning a lot while making these Floppy Boards.
Features
- Programmable with Arduino IDE and STMCubeIDE
- Planty of the module
- Small dimensions
- Lots of GPIO
The most recent version I've made
The third version of the Floppy Board, this board has incorporated all possible improvements regarding the interface between the Floppy Board and the computer. In this version, it excels over the others in the following aspects:
- The last upgrade includes a USB-C port, allowing you to power our projects and load firmware directly without the need for an ST-Link.
- Additionally, the board has been further downsized, featuring two holes on each side when inserted into a breadboard!
- I've added a pin where you can access the incoming 5V voltage from the USB , enabling you to power external circuits directly from the convenient USB-C.
- The silkscreen has been completely updated, making it much more legible and aesthetically pleasing.
- inally, we've introduced the option to install an EEPROM on the back of the board , enabling you to permanently save small amounts of data even in the absence of power.
License
Parts
339| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C2, C2, C2, C2, C2, C3, C3, C3, C3, C3, C3, C6, C6, C6, C6 +14 |
| 24 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R2, R2, R2, R2, R2, R3, R3, R3, R3, R3, R3, R6, R6, R6, R6 +8 |
| 17 | VAL** | Panelization:mouse-bite-2mm-slot | mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot, mouse-bite-2mm-slot +1 |
| 12 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C4, C4, C4, C4, C4, C5, C5, C5, C5, C5, C5 |
| 12 | SD103AW | Diode_SMD:D_SOD-123 | D1, D1, D1, D1, D1, D1, D5, D5, D5, D5, D5, D5 |
| 6 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R1, R1, R1, R1, R1 |
| 6 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C7, C7, C7, C7, C7 |
| 6 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R4, R4, R4, R4, R4 |
| 6 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R5, R5, R5, R5, R5 |
| 6 | 3V3_POWER_LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4, D4, D4, D4, D4, D4 |
| 6 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C1, C1, C1, C1, C1 |
| 6 | 500mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1, F1, F1, F1, F1, F1 |
| 6 | AT24C32 | Package_SO:SOP-8_3.9x4.9mm_P1.27mm | U2, U2, U2, U2, U2, U2 |
| 6 | BOOT0/U_BUTT | _MIA footprint:SMD BUTTON 5.1x5.1 | SW2, SW2, SW2, SW2, SW2, SW2 |
| 6 | CH340N | Package_SO:SOP-8_3.9x4.9mm_P1.27mm | U4, U4, U4, U4, U4, U4 |
| 6 | G*** | kibuzzard-644D5A83 | kibuzzard-644D5A83, kibuzzard-644D5A83, kibuzzard-644D5A83, kibuzzard-644D5A83, kibuzzard-644D5A83, kibuzzard-644D5A83 |
| 6 | G*** | kibuzzard-644D5AD1 | kibuzzard-644D5AD1, kibuzzard-644D5AD1, kibuzzard-644D5AD1, kibuzzard-644D5AD1, kibuzzard-644D5AD1, kibuzzard-644D5AD1 |
| 6 | G*** | kibuzzard-644D5B14 | kibuzzard-644D5B14, kibuzzard-644D5B14, kibuzzard-644D5B14, kibuzzard-644D5B14, kibuzzard-644D5B14, kibuzzard-644D5B14 |
| 6 | G*** | kibuzzard-644D5CBA | kibuzzard-644D5CBA, kibuzzard-644D5CBA, kibuzzard-644D5CBA, kibuzzard-644D5CBA, kibuzzard-644D5CBA, kibuzzard-644D5CBA |
| 6 | G*** | kibuzzard-644D5758 | kibuzzard-644D5758, kibuzzard-644D5758, kibuzzard-644D5758, kibuzzard-644D5758, kibuzzard-644D5758, kibuzzard-644D5758 |
| 6 | G*** | kibuzzard-644D5750 | kibuzzard-644D5750, kibuzzard-644D5750, kibuzzard-644D5750, kibuzzard-644D5750, kibuzzard-644D5750, kibuzzard-644D5750 |
| 6 | G*** | kibuzzard-644D5814 | kibuzzard-644D5814, kibuzzard-644D5814, kibuzzard-644D5814, kibuzzard-644D5814, kibuzzard-644D5814, kibuzzard-644D5814 |
| 6 | G*** | kibuzzard-644D5C68 | kibuzzard-644D5C68, kibuzzard-644D5C68, kibuzzard-644D5C68, kibuzzard-644D5C68, kibuzzard-644D5C68, kibuzzard-644D5C68 |
| 6 | G*** | kibuzzard-644D6722 | kibuzzard-644D6722, kibuzzard-644D6722, kibuzzard-644D6722, kibuzzard-644D6722, kibuzzard-644D6722, kibuzzard-644D6722 |
| 6 | G*** | kibuzzard-644D56F9 | kibuzzard-644D56F9, kibuzzard-644D56F9, kibuzzard-644D56F9, kibuzzard-644D56F9, kibuzzard-644D56F9, kibuzzard-644D56F9 |
| 6 | G*** | kibuzzard-644D571B | kibuzzard-644D571B, kibuzzard-644D571B, kibuzzard-644D571B, kibuzzard-644D571B, kibuzzard-644D571B, kibuzzard-644D571B |
| 6 | G*** | kibuzzard-644D5AFD | kibuzzard-644D5AFD, kibuzzard-644D5AFD, kibuzzard-644D5AFD, kibuzzard-644D5AFD, kibuzzard-644D5AFD, kibuzzard-644D5AFD |
| 6 | G*** | kibuzzard-644D5C93 | kibuzzard-644D5C93, kibuzzard-644D5C93, kibuzzard-644D5C93, kibuzzard-644D5C93, kibuzzard-644D5C93, kibuzzard-644D5C93 |
| 6 | G*** | kibuzzard-644D58F1 | kibuzzard-644D58F1, kibuzzard-644D58F1, kibuzzard-644D58F1, kibuzzard-644D58F1, kibuzzard-644D58F1, kibuzzard-644D58F1 |
| 6 | G*** | kibuzzard-644D5C5F | kibuzzard-644D5C5F, kibuzzard-644D5C5F, kibuzzard-644D5C5F, kibuzzard-644D5C5F, kibuzzard-644D5C5F, kibuzzard-644D5C5F |
| 6 | G*** | kibuzzard-644D5953 | kibuzzard-644D5953, kibuzzard-644D5953, kibuzzard-644D5953, kibuzzard-644D5953, kibuzzard-644D5953, kibuzzard-644D5953 |
| 6 | G*** | kibuzzard-644D5F43 | kibuzzard-644D5F43, kibuzzard-644D5F43, kibuzzard-644D5F43, kibuzzard-644D5F43, kibuzzard-644D5F43, kibuzzard-644D5F43 |
| 6 | H7233-1 | Package_TO_SOT_SMD:SOT-23 | U3, U3, U3, U3, U3, U3 |
| 6 | I/0 DX | Connector_PinHeader_2.54mm:PinHeader_1x12_P2.54mm_Vertical | J4, J4, J4, J4, J4, J4 |
| 6 | I/O SX | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J3, J3, J3, J3, J3, J3 |
| 6 | LOGO | LOGO | G***, G***, G***, G***, G***, G*** |
| 6 | RESET_B | _MIA footprint:SMD BUTTON 5.1x5.1 | SW1, SW1, SW1, SW1, SW1, SW1 |
| 6 | SCL_JP | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2, JP2, JP2, JP2, JP2, JP2 |
| 6 | SD103AW | Diode_SMD:D_SOD-123F | D3, D3, D3, D3, D3, D3 |
| 6 | SDA_JP | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP1, JP1, JP1, JP1, JP1 |
| 6 | STM32G03xxxxx | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1, U1, U1, U1, U1, U1 |
| 6 | USB-C_304A-ACP16X | _MIA footprint:USB_C_304A-ACP16X | J2, J2, J2, J2, J2, J2 |
| 6 | USER_LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2, D2, D2, D2, D2, D2 |
| 6 | WP_JP | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3, JP3, JP3, JP3, JP3, JP3 |
| 6 | st-link | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J1, J1, J1, J1, J1 |
The 335 most common of 339 parts.
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Questions
How big is the Floppy Board v3.1 PCB?
It measures 65.5 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Floppy Board v3.1 use?
339 parts, built around the CH340N, AT24C32N, H7233-1 and SD103AW. 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 Floppy Board v3.1 KiCad files?
From the FloppyO1/Floppy_Boards repository on GitHub, at the commit this page was made from: the board is Floppy Board/Floppy Board 3/panels/Floppy Board v3.1/Floppy Board v3.1.kicad_pcb and its schematic Floppy Board/Floppy Board 1/STM32G030F6P6/STM32G030F6P6.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Floppy Board v3.1 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).