

Power control pcb
Second version of Hacklab's custom built CNC machine
- Size
- 108 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 53
- Pads
- 256
- Tracks, vias
- 637, 39
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 25 Nov 2021
- Updated
- 24 Oct 2026
Overview
Power control pcb is an open-source printed circuit board by HacklabJKL, from the HacklabJKL/sergei_cnc2 repository on GitHub. It is a 2-layer board of 108 × 55 mm with 89 parts on 53 nets, routed with 637 tracks and 39 vias.
It is built around the SY8502FCC, LTV-356T and TL431ACDBZ, with the PTD15N10, SMAJ51A and BAT54 among its other parts. Its parts include 35 resistors, 13 diodes, 12 ICs, 10 capacitors and 9 connectors. It belongs with the robots and motor control boards of this library.
Main components
9SY8502FCC
SOIC-8-EP-40℃~+125℃@(TJ) 1 1.2A 340kHz 400uA 7V~85V Adjustable Buck Buck Built-in Yes SOIC-8-EP DC-DC Converters ROHSSilergy CorpDC-DC ConvertersLTV-356T
SOP-4-2.54mm-55℃~+110℃ 1 1.2V 200mV@1mA,20mA 3.75kV 3us 4us@2mA,100Ω 50% 50mA 50mA 600% 6V 80V DC Phototransistor SOP-4-2.54mm Transistor, Photovoltaic Output Optoisolators ROHSLite-OnTransistor, Photovoltaic Output OptoisolatorsTL431ACDBZ
SOT23-3Vref (2.5V) To 36V 1% Precision Programmable ReferenceTexas InstrumentsUncategorisedPTD15N10
TO-252-55℃~+175℃ 1 N-channel 100V 15.6nC@50V 15A 30W 36pF 3V 525pF 82mΩ@4.5V TO-252 MOSFETs ROHSPUOLOPMOSFETsSMAJ51A
DO-214AC(SMA)ESD And Surge Protection (TVS/ESD)hongjiachengBAT54
SOT-23200mA 2uA@25V 30V 800mV@100mA Independent SOT-23 Schottky Diodes ROHSFOSANSchottky Diodes1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching DiodesIRF4905
TO-220-35℃~+175℃ 1 P-Channel 12nF 150nC@10V 1nF 2.5V 200W 450pF 60V 75A 9mΩ P-Channel TO-220 MOSFETs ROHSCmosMOSFETsSMAJ13A
DO-214AC(SMA)-55℃~+150℃ 13V 15.9V 18.6A 1uA 21.5V 400W@10/1000us IEC 61000-4-2 TVS Unidirectional DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
README
README.mdSergei 2 CNC machine project
This repository contains design files for Hacklab Jyväskylä's CNC machine project. The machine is built out of existing linear assemblies that have been donated to us, and as such it is not readily reproducible. But some of the modules may be useful and in any case this repository contains information for future maintenance of the machine.
The machine design is a compromise between router and mill designs. In general router-type CNC machines are more useful for our typical projects, as they have larger work area for flat stock. But in the same time it would be desirable for the machine to be sturdy enough to cut mild steel at reasonable speeds.
The basic design is similar to fixed gantry routers or a portal milling machine. X axis ballscrew assembly moves up and down on two Z axis columns. Y axis moves the table.

Documentation index
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R6, R15, R16, R25, R26, R30, R33 |
| 8 | 1k | Resistor_SMD:R_0603_1608Metric | R12, R21, R24, R28, R29, R31, R32, R34 |
| 8 | LTV-356T | Package_SO:SO-4_4.4x3.6mm_P2.54mm | U1, U4, U5, U6, U8, U10, U11, U12 |
| 7 | 2k | Resistor_SMD:R_0603_1608Metric | R9, R10, R13, R14, R17, R18, R19 |
| 4 | PTD15N10 | Package_TO_SOT_SMD:TO-252-2 | Q2, Q3, Q4, Q5 |
| 4 | SMAJ51A | Diode_SMD:D_SMA | D4, D9, D10, D11 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R5, R22, R23 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C4, C9, C10 |
| 3 | 100µF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C1, C2, C7 |
| 3 | 470 | Resistor_SMD:R_0603_1608Metric | R2, R3, R35 |
| 3 | 4k7 | Resistor_SMD:R_0603_1608Metric | R7, R8, R11 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C6, C8 |
| 2 | 5.6V | Diode_SMD:D_SOD-123 | D2, D5 |
| 2 | BAT54 | Diode_SMD:D_SOD-123 | D6, D12 |
| 1 | +12V_OUT | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-4_1x04_P5.00mm_Horizontal | J5 |
| 1 | +48V_FUSED | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-6_1x06_P5.00mm_Horizontal | J1 |
| 1 | 11k | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 150k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D3 |
| 1 | 1uF | Capacitor_SMD:C_1210_3225Metric | C5 |
| 1 | 1µF | Capacitor_SMD:C_1210_3225Metric | C3 |
| 1 | 220uH | Inductor_SMD:L_12x12mm_H6mm | L1 |
| 1 | 48V_IN | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J2 |
| 1 | ACS711xLCTR-12AB | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | CURR_MONITOR | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J6 |
| 1 | Control | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-5_1x05_P2.54mm_Horizontal | J9 |
| 1 | FET_OUT | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-4_1x04_P5.00mm_Horizontal | J8 |
| 1 | IRF4905 | Package_TO_SOT_SMD:TO-263-3_TabPin2 | Q1 |
| 1 | L78L05_SOT89 | Package_TO_SOT_SMD:SOT-89-3 | U7 |
| 1 | OVERCURRENT | LED_THT:LED_D3.0mm | D7 |
| 1 | PGND_OUT | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-6_1x06_P5.00mm_Horizontal | J4 |
| 1 | POWER_GOOD | LED_THT:LED_D3.0mm | D1 |
| 1 | POWER_ON | LED_THT:LED_D3.0mm | D8 |
| 1 | SMAJ13A | Diode_SMD:D_SMA | D13 |
| 1 | SY8502 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U9 |
| 1 | Status | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-5_1x05_P2.54mm_Horizontal | J3 |
| 1 | Status_12V | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-5_1x05_P2.54mm_Horizontal | J7 |
| 1 | TL431ACDBZ | Package_TO_SOT_SMD:SOT-23 | U2 |
The 85 most common of 89 parts.
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Questions
How big is the Power control pcb PCB?
It measures 108 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power control pcb use?
89 parts, built around the SY8502FCC, LTV-356T, TL431ACDBZ and PTD15N10. 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 Power control pcb KiCad files?
From the HacklabJKL/sergei_cnc2 repository on GitHub, at the commit this page was made from: the board is electronics/power_control_pcb/power_control_pcb.kicad_pcb and its schematic electronics/braking_shunt/braking_shunt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power control pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask HacklabJKL before reusing the design.