Volumepad electronics
About the Volumepad electronics PCB
Volumepad electronics is an open source STM32 PCB design by PhiMaii, published on GitHub. It is a 4-layer board measuring 110 × 80 mm, with 169 components from 47 distinct parts.
Its main chip is the STM32F405RGTX, from the STM32 family. Other key parts include the AP1117-33, USBLC6-2SC6, MT6701CT, HX711 and 74AHCT1G125. By type, the board carries 71 capacitors, 36 diodes, 33 resistors, 7 ICs, 3 connectors and 3 LEDs.
It belongs with the displays & leds and robotics & motion designs in this gallery.
From the project
Custom STM32-based PCB for the VolumePad project.
Custom STM32-based PCB for the VolumePad project.
This board is intended for a haptic rotary input device with BLDC motor feedback, magnetic angle sensing, RGB LEDs, USB-C, buttons, strain sensing, and optional display support.
The current active development branch is v2-redesign.
. ├── pcb/ KiCad project files ├── docs/ Generated documentation, ignored by Git ├── fabrication/ Generated manufacturing files, ignored by Git ├── scripts/ Helper scripts ├── config.kibot.yaml KiBot output configuration └── .github/workflows/ GitHub Actions automation
Main components on the Volumepad electronics
Volumepad electronics bill of materials (BOM)
169 components, 47 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP1117-33 | SOT-223-3_TabPin2 | U202 |
| 1 | STM32F405RGTX STM32F405RGTx | LQFP-64_10x10mm_P0.5mm | U301 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U401 |
| 1 | MT6701CT | SO-8_3.9x4.9mm_P1.27mm | U501 |
| 1 | HX711 | SOIC-16_3.9x9.9mm_P1.27mm | U502 |
| 1 | 74AHCT1G125 | SOT-23-5 | U601 |
| 1 | TMC6300-LA | QFN40P300X300X90-21N | U701 |
| 1 | MMBT4403 | SOT-23 | Q501 |
| 1 | AO3400A | SOT-23 | Q901 |
| 1 | 8 MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y301 |
| 1 | USB_C_RECEPTACLE_USB2.0_14P USB_C_Receptacle_USB2.0_14P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J401 |
| 1 | CONN_01X03_PIN Conn_01x03_Pin | JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J701 |
| 1 | Conn_01x08_Socket | PinHeader_1x08_P2.54mm_Vertical | J901 |
| 1 | Polyfuse | Fuse_1206_3216Metric | F201 |
| 3 | MX_SW_solder | SW_MX_1u | MX501, MX502, MX503 |
| 4 | 330R | R_2512_6332Metric | RSG501, RSG502, RSG503, RSG504 |
| 1 | RESET | SW_Push_SPST_NO_Alps_SKRK | SW301 |
| 1 | BOOT0 | SW_Push_SPST_NO_Alps_SKRK | SW302 |
| 3 | MX_SK6812MINI-E | LED_MX_6028R | LED801, LED802, LED803 |
| 1 | C2445454 D_TVS | D_SOD-123 | D201 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RED | LED_0603_1608Metric | D202 |
| 1 | BLUE | LED_0603_1608Metric | D301 |
| 1 | ORANGE | LED_0603_1608Metric | D701 |
| 32 | WS2812B-2020 | LED_WS2812B-2020_PLCC4_2.0x2.0mm | D804, D805, D806, D807, D808, D809, D810, D811 +24 |
| 1 | 600R@100MHz 2A | L_0805_2012Metric | FB201 |
| 1 | 600R@100MHz, >=200mA, 0603 | L_0603_1608Metric | FB202 |
| 1 | 3U3 3u3 | L_0805_2012Metric | L501 |
| 55 | 100N 100n | C_0603_1608Metric | C201, C204, C207, C301, C302, C303, C304, C307 +47 |
| 6 | 10U 10u | C_0805_2012Metric | C202, C205, C206, C504, C507, C702 |
| 1 | 47U 47u | C_1206_3216Metric | C203 |
| 1 | 4U7 4u7 | C_0805_2012Metric | C305 |
| 2 | 1u | C_0603_1608Metric | C306, C902 |
| 2 | 2U2 2u2 | C_0805_2012Metric | C308, C309 |
| 2 | 18P 18p | C_0603_1608Metric | C311, C312 |
| 1 | 470U 470u | CP_Elec_6.3x5.8 | C602 |
| 1 | 100U 100u | CP_Elec_5x5.8 | C706 |
| 1 | 1K5 1k5 | R_0603_1608Metric | R201 |
| 7 | 10K 10k | R_0603_1608Metric | R301, R302, R501, R504, R702, R901, R902 |
| 4 | 22 | R_0603_1608Metric | R303, R304, R305, R306 |
| 1 | 1.5K 1.5k | R_0603_1608Metric | R307 |
| 2 | 5K1 5k1 | R_0603_1608Metric | R401, R402 |
| 2 | 100R | R_0603_1608Metric | R502, R503 |
| 1 | 8K2 8k2 | R_0603_1608Metric | R505 |
| 1 | 330R | R_0603_1608Metric | R601 |
| 1 | 2K2 2k2 | R_0603_1608Metric | R701 |
| 8 | 100K 100k | R_0603_1608Metric | R703, R704, R705, R706, R707, R708, R710, R907 |
| 5 | 100 | R_0603_1608Metric | R709, R903, R904, R905, R906 |
Volumepad electronics design files
The KiCad project lives in the PhiMaii/volumepad-electronics repository on GitHub; these links point at the commit this page was built from.
Volumepad electronics: common questions
What microcontroller does the Volumepad electronics use?
The Volumepad electronics is built around the STM32F405RGTX, from the STM32 family.
How big is the Volumepad electronics PCB?
The Volumepad electronics measures 110 × 80 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Volumepad electronics?
169 components, from 47 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Volumepad electronics design files?
From the PhiMaii/volumepad-electronics repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Volumepad electronics design in my own project?
The repository has no license, so all rights stay with PhiMaii. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Volumepad electronics without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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