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dubnubdubnub/Giris
open source 32 key/half (64 total) analog TMR split ortholinear keyboard w/ 8kHz USB HS
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4 layers35 × 35 mm
Lemon pepper
VIPQualityPost/lemon-pepper-stepper75simplefoc all-in-one 50W hybrid stepper + bldc driver
- Size
- 35 × 35 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 87
- Nets
- 89
- Pads
- 372
- Tracks, vias
- 941, 139
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Oct 2023
- Updated
- 24 Dec 2025
Overview
Lemon pepper is an open-source printed circuit board by VIPQualityPost, from the VIPQualityPost/lemon-pepper-stepper repository on GitHub, published under the MIT licence. It is a 4-layer board of 35 × 35 mm with 87 parts on 89 nets, routed with 941 tracks and 139 vias.
It is built around the SN65HVD230D, L6226QTR and MAX15062AATA+T, with the MT6835, SRV05-4A and 1N4148WS among its other parts. Its parts include 28 capacitors, 23 resistors, 8 ICs, 8 diodes and 4 connectors. It belongs with the robots and motor control boards and the STM32 boards of this library.
Main components
9
SN65HVD230D
SOIC-8-40℃~+85℃ 1 17mA 1Mbps 370uA 3V~3.6V CAN Transceiver Low-power mode、Wake-up function、ESD protection、Thermal shutdown protection、Bus fault protection、Hot-swap protection SOIC-8 CAN Transceivers ROHSTexas InstrumentsCAN Transceivers
L6226QTR
QFN-32(5x5)-25℃~+125℃ 1.47Ω 1.4A 2 Bipolar Driver Yes QFN-32(5x5) Stepper Motor Driver ROHSSTMicroelectronicsMotor Drivers
MAX15062AATA+T
TDFN-8(2x2)-40℃~+125℃@(TA) 1 3.3V 300mA 4.5V~60V 465kHz~535kHz Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Operating status indication、Cycle-by-cycle current limiting、Hiccup current limiting、Built-in LDO regulator Step-down type Yes TDFN-8(2x2) DC-DC Converters ROHSMaxim Integrated (Analog Devices)DC-DC Converters
MT6835
TSSOP-16TSSOP-16 SMT ROHSNOVOSENSEUncategorised
SRV05-4A
SOT-23-6L-55℃~+155℃ 0.5pF、1pF 15V 4A@8/20us 5V 5uA 6V 80W@8/20us ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching DiodesBZT52C30S
SOD-323-55℃~+150℃ 1 Independent 100nA 200mW 28V~32V 300Ω 30V 80Ω SOD-323 Zener Diodes ROHShongjiachengZener Diodes
MMBT5551
SOT-23-55℃~+150℃ 1 NPN 160V 200 200mV 300MHz 300mW 50nA 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
SS210
SMA(DO-214AC)-55℃~+150℃ 1 Independent 100V 2A 500uA@100V 850mV@2A SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.md
Lemon Pepper Stepper Driver
Small, all in one hybrid stepper + BLDC driver, designed to mount to the back of NEMA 14/17 size stepper motors. The board supports up to 48V @ 1.5A with a choice of either step-dir, CAN bus, I2C, UART or USB input. Additionally, there are 5 GPIO broken out that can be used for a second encoder (AB hardware encoder or I2C), endstops or other general purposes. Current sensing is also included on-board. The boards can easily be assembled by JLC and the design has been cost-optimized, coming in at about $20 per board fully assembled (minus connectors, which need to be modified to sit flat on motor back).
Due to the high pole pair count of stepper motors, a high resolution (21 bit) magnetic encoder is used, supporting both SPI and hardware ABI position encoding.
Despite the rather high theoretical performance of this board I think you would need some serious cooling to actually hit the potential 50-70W specs of the parts. A heatsink has been designed and produced that works well with the board, giving a uniform back profile and small fins for heat dissipation.
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | lemon-pepper-footprints:C_0402_1005Metric | C302, C303, C304, C307, C308, C401, C701, C702, C703, C704 |
| 10 | 10u | lemon-pepper-footprints:C_0805_2012Metric | C101, C102, C103, C104, C105, C106, C107, C108, C501, C503 |
| 5 | 0R | lemon-pepper-footprints:R_0402_1005Metric | R104, R105, R501, R702, R704 |
| 5 | 5k1 | lemon-pepper-footprints:R_0402_1005Metric | R101, R102, R301, R302, R601 |
| 3 | 10k | lemon-pepper-footprints:R_0402_1005Metric | R305, R306, R401 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID101, FID102, FID103 |
| 2 | 1N4148WS | lemon-pepper-footprints:D_SOD-323 | D602, D603 |
| 2 | 1u | lemon-pepper-footprints:C_0402_1005Metric | C301, C502 |
| 2 | 20m | lemon-pepper-footprints:R_1206_3216Metric | R701, R703 |
| 2 | 20p | lemon-pepper-footprints:C_0402_1005Metric | C305, C306 |
| 2 | 47p | lemon-pepper-footprints:C_0402_1005Metric | C201, C202 |
| 2 | BZT52C30S | lemon-pepper-footprints:D_SOD-323 | D501, D502 |
| 2 | MAX49925 | lemon-pepper-footprints:DFN-10-1EP_3x3mm_P0.5mm_EP1.75x2.7mm | U701, U703 |
| 1 | 0R | lemon-pepper-footprints:R_0603_1608Metric | R506 |
| 1 | 10n | lemon-pepper-footprints:C_0402_1005Metric | C601 |
| 1 | 120R | lemon-pepper-footprints:R_0402_1005Metric | R103 |
| 1 | 12MHz | lemon-pepper-footprints:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y301 |
| 1 | 15k | lemon-pepper-footprints:R_0402_1005Metric | R505 |
| 1 | 220n | lemon-pepper-footprints:C_0402_1005Metric | C602 |
| 1 | 22k | Resistor_SMD:R_0402_1005Metric | R503 |
| 1 | 33u | lemon-pepper-footprints:IND-SMD_L4.0-W4.0 | L501 |
| 1 | 3k3 | lemon-pepper-footprints:R_0402_1005Metric | R304 |
| 1 | 51k | lemon-pepper-footprints:R_0402_1005Metric | R303 |
| 1 | 51k | Resistor_SMD:R_0402_1005Metric | R502 |
| 1 | 5R | lemon-pepper-footprints:R_0603_1608Metric | R504 |
| 1 | FAULT | lemon-pepper-footprints:D_0603_1608Metric | D302 |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-6557D149 | kibuzzard-6557D149 |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-6557D15D | kibuzzard-6557D15D |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-694B0394 | kibuzzard-694B0394 |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-6557D153 | kibuzzard-6557D153 |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-652C580D | kibuzzard-652C580D |
| 1 | G*** | lemon-pepper-footprints:kibuzzard-652C57F7 | kibuzzard-652C57F7 |
| 1 | INPUT | lemon-pepper-footprints:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J101 |
| 1 | L6226QTR | lemon-pepper-footprints:ST-L6226Q-VQFN32 | U601 |
| 1 | MAX15062AATA+T | lemon-pepper-footprints:TDFN-8-1EP_2x2mm_P0.5mm_EP0.8x1.2mm | U501 |
| 1 | MMBT5551 | lemon-pepper-footprints:SOT-23 | Q501 |
| 1 | MOT | lemon-pepper-footprints:XH2.54 4P | M101 |
| 1 | MT6835 | lemon-pepper-footprints:TSSOP-16_4.4x5mm_P0.65mm | U401 |
| 1 | OCD | lemon-pepper-footprints:D_0603_1608Metric | D601 |
| 1 | PCB | lemon-pepper-footprints:nema-14-17-hybrid | H101 |
| 1 | SN65HVD230 | lemon-pepper-footprints:SOIC-8_3.9x4.9mm_P1.27mm | U302 |
| 1 | SRV05-4A | lemon-pepper-footprints:SOT-23-6 | U201 |
| 1 | SS210 | lemon-pepper-footprints:D_SMA | D101 |
| 1 | STM32G431 | lemon-pepper-footprints:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U301 |
| 1 | TERM | Resistor_SMD:R_0402_1005Metric | JP101 |
| 1 | TagConnect | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J301 |
| 1 | USB_C_Receptacle_USB2.0 | lemon-pepper-footprints:usb_c | J201 |
| 1 | USER | lemon-pepper-footprints:D_0603_1608Metric | D301 |
| 1 | USER | lemon-pepper-footprints:SW_SPST_B3U-3000P | SW301 |
| 1 | USER CONN. | lemon-pepper-footprints:PinHeader_1x05_P1.27mm_SMD | J302 |
Questions
How big is the Lemon pepper PCB?
It measures 35 × 35 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Lemon pepper use?
87 parts, built around the SN65HVD230D, L6226QTR, MAX15062AATA+T and MT6835. 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 Lemon pepper KiCad files?
From the VIPQualityPost/lemon-pepper-stepper repository on GitHub, at the commit this page was made from: the board is hardware/lemon-pepper.kicad_pcb and its schematic hardware/currentsense.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lemon pepper design in my own project?
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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