4 layers120 × 93 mm
6 layers144 × 130 mm
Tolt
LJBoxx/bigtolt5high power esc based off vesc project with tolt mosfet
- Size
- 144 × 130 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 408
- Nets
- 204
- Pads
- 1,335
- Tracks, vias
- 2,353, 705
- Pours
- 223
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jul 2025
- Updated
- 9 Aug 2026
Overview
Tolt is an open-source printed circuit board by LJBoxx, from the LJBoxx/bigtolt repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 6-layer board of 144 × 130 mm with 408 parts on 204 nets, routed with 2,353 tracks and 705 vias.
It is built around the SRV05-4, AMS1117-3.3 and BMI323, with the SS1200, STTH2R06A and STTH1R06U among its other parts. Its parts include 155 capacitors, 124 resistors, 30 diodes, 20 transistors and 17 ICs. It belongs with the robots and motor control boards of this library.
Main components
9
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BMI323
LGA-14-40℃~+85℃ IMU (accelerometer + gyroscope) Motion event detection LGA-14 Accelerometers ROHSBosch SensortecAccelerometers
SS1200
SMA(DO-214AC)-55℃~+150℃ 100uA@200V 1A 200V 25A 900mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky DiodesSTTH2R06A
SMA-40℃~+175℃ 1 Independent 1V@2A 2A 2uA@600V 30A 35ns 600V SMA Fast Recovery / High Efficiency Diodes ROHSSTMicroelectronicsFast Recovery / High Efficiency Diodes
STTH1R06U
SMB1.7V@1A 1A 1uA@600V 20A 30ns 600V SMB Fast Recovery / High Efficiency Diodes ROHSSTMicroelectronicsFast Recovery / High Efficiency Diodes
BAT46W
SOD-123-55℃~+125℃ 1 Independent 100V 150mA 2uA@75V 450mV@10mA 750mA SOD-123 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
BSS131
SOT-23-55℃~+150℃ 1 N-channel 1.8V 100mA 14Ω@10V 240V 3.1nC@10V 360mW 4.2pF 77pF SOT-23 MOSFETs ROHSHXY MOSFETMOSFETsCJ3400
SOT-231 N-channel 1.05nF 1.4V 30V 350mW 5.8A 52mΩ@2.5V 66pF 77pF N-Channel SOT-23 MOSFETs ROHSJiangsu Changjing Electronics Technology (CJ)MOSFETs
README
README.mdBigTOLT - Big(kinda) esc with TOLT mosfets
18 mosfet TOLT package esc design based off vesc6 schematic and compatible with VESC firmware.
There is also a small high voltage converter used for higher voltage operation, aim was to have a quite big voltage operation range. But if you will test it with high voltage, please do mind that the voltage sensing is un-isolated
Tested !!
This board is tested but the pcb needs some fixes (will do soon). BOM and gerber are in here
Board preview
Liability
This project sources are provided as is therfore I, and the co controbutors to this repository shall not be held responsible for any damage occured, including but not limited to hardware damages or other physical injury caused by the outcomes of this source. You are responsible for your actions. If used wrong, it will go wrong!
Parts
408| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R37, R38, R39, R103, R104, R105, R106, R107, R108, R109, R110, R111, R121 +22 |
| 30 | 1uf | Capacitor_SMD:C_2220_5750Metric | C101, C102, C103, C104, C105, C106, C107, C108, C109, C110, C112, C113, C114, C115, C128, C129 +14 |
| 28 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C24, C25, C26, C27, C28, C31, C32, C33, C34, C37, C38, C39, C144 +12 |
| 18 | 24r | Resistor_SMD:R_0805_2012Metric | R5, R6, R7, R10, R14, R15, R16, R17, R18, R19, R23, R24, R25, R27, R28, R29 +2 |
| 18 | D | Diode_SMD:D_SOD-123 | D4, D5, D6, D7, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21 +2 |
| 18 | FerriteBead | Capacitor_SMD:C_0603_1608Metric | FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB10, FB11, FB12, FB13, FB14, FB15, FB16, FB17, FB18 +2 |
| 18 | NMOS | Library:HDSOP-16-2 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 +2 |
| 13 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C15, C17, C19, C21, C22, C23, C81, C83, C84, C91, C111, C145, C146 |
| 12 | 2.2uf | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7, C8, C9, C10, C13, C14, C58, C59, C60, C78 |
| 11 | 100nF | Capacitor_SMD:C_0402_1005Metric | C62, C64, C67, C69, C116, C118, C120, C122, C123, C125, C127 |
| 11 | 560u | Capacitor_THT:CP_Radial_D16.0mm_P7.50mm | C89, C90, C92, C93, C94, C95, C96, C97, C98, C99, C100 |
| 9 | 0.3mr | Library:R5930 | R11, R12, R13, R20, R21, R22, R30, R31, R32 |
| 9 | 1n | Capacitor_SMD:C_0603_1608Metric | C30, C35, C40, C51, C52, C53, C153, C154, C155 |
| 9 | 2.2uF | Capacitor_SMD:C_1210_3225Metric | C63, C65, C68, C70, C117, C119, C121, C124, C126 |
| 8 | 2k2 | Resistor_SMD:R_0603_1608Metric | R73, R74, R75, R79, R81, R100, R101, R102 |
| 7 | 10uF | Capacitor_SMD:C_1210_3225Metric | C42, C43, C44, C71, C85, C88, C149 |
| 7 | 1k | Resistor_SMD:R_0603_1608Metric | R33, R34, R35, R67, R70, R71, R115 |
| 6 | MC74VHC1GT66 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U6, U8, U10, U11, U12, U13 |
| 5 | 4.3k | Resistor_SMD:R_0603_1608Metric | R76, R77, R78, R80, R82 |
| 4 | 100n | Capacitor_SMD:C_0603_1608Metric | C54, C55, C56, C57 |
| 4 | 100r | Resistor_SMD:R_0603_1608Metric | R98, R122, R123, R124 |
| 4 | Conn_01x03 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J5, J6, J9, J10 |
| 3 | 0 | Resistor_SMD:R_0815_2038Metric | R4, R68, R69 |
| 3 | 10k_NTC | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R58, R59, R60 |
| 3 | 15n | Capacitor_SMD:C_0603_1608Metric | C29, C36, C41 |
| 3 | 220nF | Capacitor_SMD:C_0402_1005Metric | C16, C18, C20 |
| 3 | 240k | Resistor_SMD:R_1206_3216Metric | R43, R45, R47 |
| 3 | 320k | Resistor_SMD:R_0603_1608Metric | R36, R51, R53 |
| 3 | 5.1k | Resistor_SMD:R_0603_1608Metric | R44, R46, R48 |
| 3 | Conn_01x05 | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J1, J4, J7 |
| 3 | INA240/241 | Package_TO_SOT_SMD:SOT-23-8 | U5, U7, U9 |
| 3 | L6491 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U2, U3, U4 |
| 3 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U21, U22, U23 |
| 3 | SS1200 | Diode_SMD:D_SMA | D30, D31, D32 |
| 3 | STTH2R06A | Diode_SMD:D_SMA | D1, D2, D3 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R94, R95 |
| 2 | 10uh | Library:IND-SMD_L3.9-W3.9-1 | L1, L2 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C11, C12 |
| 2 | 220r | Resistor_SMD:R_0603_1608Metric | R65, R66 |
| 2 | 22uF | Capacitor_SMD:C_1210_3225Metric | C77, C148 |
| 2 | 470k | Resistor_SMD:R_1206_3216Metric | R49, R96 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R26, R84 |
| 2 | BZT52C3V6-7-F | Diode_SMD:D_SOD-123 | D24, D25 |
| 2 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J11, J11 |
| 2 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2, JP3 |
| 2 | STTH1R06U | Diode_SMD:D_SMB | D33, D34 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R119 |
| 1 | 1.5mH | Inductor_SMD:L_Bourns_SRN8040TA | L4 |
| 1 | 10.2k | Resistor_SMD:R_0603_1608Metric | R50 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R116 |
| 1 | 100n | Capacitor_SMD:C_1210_3225Metric | C147 |
| 1 | 100nF | Capacitor_SMD:C_1206_3216Metric | C150 |
| 1 | 100uF | Capacitor_SMD:C_0402_1005Metric | C66 |
| 1 | 100uF | Capacitor_SMD:CP_Elec_6.3x5.4 | C152 |
| 1 | 10uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C151 |
| 1 | 12.7k | Resistor_SMD:R_1206_3216Metric | R118 |
| 1 | 120ohm | Resistor_SMD:R_0603_1608Metric | R83 |
| 1 | 2.8M | Resistor_SMD:R_0603_1608Metric | R112 |
| 1 | 200k | Resistor_SMD:R_0603_1608Metric | R113 |
| 1 | 220uH | Library:IND-SMD_L8.0-W8.0_FNR80XXS | L5 |
| 1 | 2k | Resistor_SMD:R_2512_6332Metric | R117 |
| 1 | 33uF | Capacitor_THT:CP_Radial_D10.0mm_P2.50mm_P5.00mm | C74 |
| 1 | 33uF | Capacitor_SMD:CP_Elec_4x5.4 | C61 |
| 1 | 33uF | Capacitor_Tantalum_SMD:CP_EIA-3528-15_AVX-H | C86 |
| 1 | 4.7M | Resistor_SMD:R_1206_3216Metric | R114 |
| 1 | 430pF | Resistor_SMD:R_0402_1005Metric | C72 |
| 1 | 470nF | Capacitor_SMD:C_1210_3225Metric | C75 |
| 1 | 470r | Resistor_SMD:R_0603_1608Metric | R97 |
| 1 | 47uF | Capacitor_SMD:C_0805_2012Metric | C73 |
| 1 | 4k | Resistor_SMD:R_0603_1608Metric | R120 |
| 1 | 523k | Resistor_SMD:R_0402_1005Metric | R64 |
| 1 | 8m | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U14 |
| 1 | BAT46W | Diode_SMD:D_SOD-323F | D28 |
| 1 | BMI323 | Package_LGA:Bosch_LGA-14_3x2.5mm_P0.5mm | U17 |
| 1 | BOOT0 | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | J14 |
| 1 | BSS131 | Package_TO_SOT_SMD:SOT-23 | Q20 |
| 1 | BZT52C5V6-7-F | Diode_SMD:D_SOD-123 | D29 |
| 1 | CJ3400 | Package_TO_SOT_SMD:SOT-23 | Q19 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J8 |
The 382 most common of 408 parts.
Questions
How big is the Tolt PCB?
It measures 144 × 130 mm and has 6 copper layers, 1.6 mm thick.
What parts does the Tolt use?
408 parts, built around the SRV05-4, AMS1117-3.3, BMI323 and SS1200. 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 Tolt KiCad files?
From the LJBoxx/bigtolt repository on GitHub, at the commit this page was made from: the board is tolt/tolt.kicad_pcb and its schematic tolt/auxl.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tolt 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).
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