Led power
About the Led power PCB
Led power is an open source STM32 PCB design by jkominek, published on GitHub under the Custom license license. It is a 4-layer board measuring 86.4 × 86.4 mm, with 84 components from 37 distinct parts.
Its main chip is the STM32G030Fx, from the STM32 family. Other key parts include the MCP6V51, L78L05ACZ-AP, MCP1501 and LM317_TO-220. By type, the board carries 24 capacitors, 15 resistors, 14 connectors, 12 ICs, 10 diodes and 9 transistors.
It belongs with the audio designs in this gallery.
From the project
Hardware, and some firmware, for acoustic piano to MIDI controller conversion.
As covered in the main design doc, the board takes +48V, and uses them to feed 8 strings of LEDs with a constant current of ~20mA.
See the wiki page about the board for details on how it works.
Main components on the Led power
Led power bill of materials (BOM)
84 components, 37 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | MCP6V51 | MSOP-8_3x3mm_Pitch0.65mm | U1, U2, U3, U4, U5, U6, U7, U8 |
| 1 | STM32G030Fx | TSSOP-20_4.4x6.5mm_P0.65mm | U9 |
| 1 | L78L05ACZ-AP | TO-92_Inline_Wide | U10 |
| 1 | MCP1501 | SOIC-8-N | U11 |
| 1 | LM317_TO-220 | TO-220-3_Vertical | U12 |
| 8 | Q_NMOS_GDS | TO-220-3_Vertical | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 1 | Q_NPN_BEC | SOT-23 | Q9 |
| 1 | String1 | Pin_Header_Angled_1x02_Pitch2.54mm | J1 |
| 1 | String2 | Pin_Header_Angled_1x02_Pitch2.54mm | J2 |
| 1 | String3 | Pin_Header_Angled_1x02_Pitch2.54mm | J3 |
| 1 | String4 | Pin_Header_Angled_1x02_Pitch2.54mm | J4 |
| 1 | String5 | Pin_Header_Angled_1x02_Pitch2.54mm | J5 |
| 1 | String6 | Pin_Header_Angled_1x02_Pitch2.54mm | J6 |
| 1 | String7 | Pin_Header_Angled_1x02_Pitch2.54mm | J7 |
| 1 | String8 | Pin_Header_Angled_1x02_Pitch2.54mm | J8 |
| 1 | PowerInput | TerminalBlock_bornier-2_P5.08mm | J9 |
| 1 | Conn_01x05_Male | PinHeader_1x05_P2.54mm_Vertical | J10 |
| 2 | Qwiic | JST_SH_SM04B-SRSS-TB_04x1.00mm_Angled | J11, J12 |
| 1 | I2C Header | Pin_Header_Straight_1x04_Pitch2.54mm | J16 |
| 1 | IRQ | Pin_Header_Straight_1x02_Pitch2.54mm | J17 |
Show 17 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D3, D4, D5, D6, D7, D8 |
| 1 | D_Small_ALT | D_SOD-123F | D9 |
| 1 | 2.2Vf | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 19 | .1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 +11 |
| 1 | Lots | CP_Radial_D16.0mm_P7.50mm | C9 |
| 1 | 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C21 |
| 1 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C22 |
| 1 | 300pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23 |
| 1 | 2.2uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C29 |
| 8 | 100 | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R2, R3, R4, R5, R6, R7, R8 |
| 1 | 3600 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 1000 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 6800 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | 2400 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24 |
| 1 | 110k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25 |
| 1 | 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R27 |
Led power design files
The KiCad project lives in the jkominek/piano-conversion repository on GitHub; these links point at the commit this page was built from.
Led power: common questions
What microcontroller does the Led power use?
The Led power is built around the STM32G030Fx, from the STM32 family.
How big is the Led power PCB?
The Led power measures 86.4 × 86.4 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Led power?
84 components, from 37 distinct parts. The full bill of materials is listed on this page.
Where can I download the Led power design files?
From the jkominek/piano-conversion repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Led power design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Led power 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.
More boards in piano-conversion
STM32Main board
100 × 100 mm148 parts4LCustom license53
STM32ADC Board
92.7 × 83.8 mm100 parts4LCustom license53
STM32Pedal board
108 × 56 mm43 parts2LCustom license53
Link adapter
77.5 × 40.6 mm38 parts2LCustom license53
Sensorboard tester
83.8 × 83.8 mm33 parts2LCustom license53
Led test bar
174 × 16.5 mm31 parts2LCustom license53
STM32Midi board
88 × 45.8 mm31 parts2LCustom license53
Usb led power
80 × 40 mm15 parts2LCustom license53
2020-offset-4x
45.5 × 45.3 mm5 parts2LCustom license53
2040-centered-4x-12deg
47 × 48 mm5 parts2LCustom license53
2040-centered-4x
45.5 × 48 mm5 parts2LCustom license53
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