4 layers220 × 172.8 mm
Hw openmower universal
xtech/hw-openmower-universal
This hardware version is in beta state. Expect for things to not work at the current state!
472 parts20CC-BY-4.0
4 layers100 × 65 mm
Hw charger
xtech/hw-module-chargerThis hardware version is in beta state. Expect for things to not work at the current state!
- Size
- 100 × 65 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 164
- Nets
- 60
- Pads
- 385
- Tracks, vias
- 375, 195
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Mar 2026
- Updated
- 12 Oct 2026
Overview
Hw charger is an open-source printed circuit board by xtech, from the xtech/hw-module-charger repository on GitHub. It is a 4-layer board of 100 × 65 mm with 164 parts on 60 nets, routed with 375 tracks and 195 vias.
It is built around the BQ25756RRVR, ME6203A50M3G and BSC0702LS, with the VS-2EFH02HM3/I, 22PF/50V 10% and PDZ3.3B,115-JSM among its other parts. Its parts include 36 capacitors, 36 resistors, 16 connectors, 12 ICs and 8 diodes. It belongs with the power boards of this library.
Main components
7
BQ25756RRVR
VQFN-36(5x6)-40℃~+125℃ 17uA 1~14 20A 4.2V~70V Charging IC I2C Lithium Battery、LiFePO4 Battery Support VQFN-36(5x6) Battery Management ROHSTexas InstrumentsBattery Management
ME6203A50M3G
SOT-23-45℃~+150℃ 1 130mV@(10mA)、680mV@(50mA) 150mA 3.3uA 40V 5V Fixed Positive Short Circuit Protection SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BSC0702LS
TDSON-8(5x6)-55℃~+150℃ 1 N-channel 2.3V 2.7mΩ@10V 30nC@4.5V 4.4nF 58pF 60V 83W 84A TDSON-8(5x6) MOSFETs ROHSInfineon TechnologiesMOSFETs
VS-2EFH02HM3/I
DO-219AB(SMF)-65℃~+175℃ 200V 2A 2uA@200V 50A 880mV@2A Independent DO-219AB(SMF) Diodes - General Purpose ROHSVishay IntertechnologyDiodes - General Purpose22PF/50V 10%
插件插件 Through Hole Ceramic Capacitors ROHSMade in ChinaThrough Hole Ceramic Capacitors
PDZ3.3B,115-JSM
SOD-323-55℃~+150℃ 1 Independent 130Ω 20uA@1V 3.23V~3.37V 3.3V 300mW ±2% SOD-323 Zener Diodes ROHSJSMSEMIZener Diodes
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdUniversal OpenMower Charger
Information
This hardware version is in beta state. Expect for things to not work at the current state!
About This Repo
OpenMower is an open-source project that upgrades off-the-shelf robotic mowers into modern, smart lawn mowing robots with RTK GPS technology. For more details, check out the OpenMower project.
This repository contains the design files for a custom charger specifically designed for converting YardForce mowers to OpenMower.
Patents, Local Laws, Liability
Before building a robot based on the designs published here, please make sure that you are allowed to do so in your specific regions. There may be patents and / or laws prohibiting you of doing so.
The code/schematics/PCB files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This basically means: I'm just documenting a project of mine here for free and I don't have the time and resources to check that devices built using this information will be safe to use, legal to use or even work as intended. You will need technical know-how to use this project and I'm not liable for any damages your devices do to anyone or anything.
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Parts
164| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 4.7uF@50V | Capacitor_SMD:C_1206_3216Metric | C2, C3, C6, C38, C39, C40, C41, C43, C44, C45, C46, C55, C56, C58, C59 |
| 7 | 100nF@100V | Capacitor_SMD:C_0805_2012Metric | C13, C16, C62, C77, C79, C81, C82 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R5, R6, R34, R35, R75, R76 |
| 5 | DNP | Resistor_SMD:R_0603_1608Metric | R71, R88, R94, R95, R96 |
| 5 | G*** | kibuzzard-68532E1B | kibuzzard-68532E1B, kibuzzard-68532E1B, kibuzzard-68532E1B, kibuzzard-68532E1B, kibuzzard-68532E1B |
| 5 | G*** | kibuzzard-68532E12 | kibuzzard-68532E12, kibuzzard-68532E12, kibuzzard-68532E12, kibuzzard-68532E12, kibuzzard-68532E12 |
| 5 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J10, J56, J58, J60, J62 |
| 4 | 10R | Resistor_SMD:R_0603_1608Metric | R1, R3, R68, R69 |
| 4 | 220uF@80V | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C1, C42, C47, C50 |
| 4 | BSC0702LS | Package_TO_SOT_SMD:TDSON-8-1 | Q6, Q7, Q8, Q9 |
| 4 | Conn_01x02 | local_Connectors:AMASS_XT30U-F_1x02_P5.0mm_Vertical_mod | J57, J59, J61, J63 |
| 4 | Fuse Holder | xtech:Dummy | U14, U15, U16, U17 |
| 4 | LED GREEN | LED_SMD:LED_0805_2012Metric | D5, D6, D29, D39 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_4.3mm_M4_Pad_Via | H1, H2, H3, H4 |
| 3 | G*** | kibuzzard-69C99438 | kibuzzard-69C99438, kibuzzard-69C99438, kibuzzard-69C99438 |
| 2 | 100nF@50V | Capacitor_SMD:C_0603_1608Metric | C7, C12 |
| 2 | 12.1k 1% | Resistor_SMD:R_0603_1608Metric | R81, R93 |
| 2 | 16.2k 1% | Resistor_SMD:R_0603_1608Metric | R23, R36 |
| 2 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C78, C84 |
| 2 | 470nF/25V | Capacitor_SMD:C_0603_1608Metric | C83, C85 |
| 2 | 5m | Resistor_SMD:R_2512_6332Metric | R30, R67 |
| 2 | Conn_01x02 | local_Connectors:AMASS_XT30U-M_1x02_P5.0mm_Vertical_mod | J9, J17 |
| 2 | DNP | Capacitor_SMD:C_0603_1608Metric | C11, C49 |
| 2 | Fuse | local_FUSE:Fuseholder5x20_horiz_open_inline_C3130 | F1, F2 |
| 2 | Fuse 2A | xtech:Dummy | U74, U75 |
| 2 | G*** | kibuzzard-670E90ED | kibuzzard-670E90ED, kibuzzard-670E90ED |
| 2 | Jumper Black | xtech:SNT-100-BK-H | U2, U3 |
| 2 | TS Select | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | TP1, TP3 |
| 2 | VS-2EFH02HM3/I | Diode_SMD:D_SMF | D2, D26 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric | R66 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R89 |
| 1 | 10uH | Inductor_SMD:L_Sunlord_MWSA1004S | L4 |
| 1 | 133k | Resistor_SMD:R_0603_1608Metric | R74 |
| 1 | 13k 0.1% | Resistor_SMD:R_0402_1005Metric | R55 |
| 1 | 15k 0.1% | Resistor_SMD:R_0603_1608Metric | R86 |
| 1 | 1uF@50V | Capacitor_SMD:C_0805_2012Metric | C80 |
| 1 | 200k 0.1% | Resistor_SMD:R_0402_1005Metric | R54 |
| 1 | 20k 0.1% | Resistor_SMD:R_0603_1608Metric | R87 |
| 1 | 220kR 0.1% | Resistor_SMD:R_0603_1608Metric | R80 |
| 1 | 22pF/50V | Capacitor_SMD:C_0603_1608Metric | C111 |
| 1 | 249kR 0.1% | Resistor_SMD:R_0603_1608Metric | R33 |
| 1 | 25k 0.1% | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 30k/1% | Resistor_SMD:R_0603_1608Metric | R73 |
| 1 | 47kR | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 5k1/1% | Resistor_SMD:R_0603_1608Metric | R72 |
| 1 | BQ25756RRVR | local_CHARGER:BQ25756RRVR | U27 |
| 1 | Conn_01x02 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J19 |
| 1 | Conn_01x05 | Connector_JST:JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J27 |
| 1 | Conn_02x04_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J2 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J4 |
| 1 | ESD-Logo_6.6x6mm_SilkScreen | Symbol:ESD-Logo_6.6x6mm_SilkScreen | LOGO2 |
| 1 | G*** | kibuzzard-69CFD05E | kibuzzard-69CFD05E |
| 1 | G*** | kibuzzard-69CD6E52 | kibuzzard-69CD6E52 |
| 1 | G*** | kibuzzard-670E91E3 | kibuzzard-670E91E3 |
| 1 | G*** | kibuzzard-671188C2 | kibuzzard-671188C2 |
| 1 | G*** | kibuzzard-670E91D3 | kibuzzard-670E91D3 |
| 1 | G*** | kibuzzard-670E91D8 | kibuzzard-670E91D8 |
| 1 | G*** | kibuzzard-69C99648 | kibuzzard-69C99648 |
| 1 | G*** | kibuzzard-671188DE | kibuzzard-671188DE |
| 1 | G*** | kibuzzard-671188D3 | kibuzzard-671188D3 |
| 1 | G*** | kibuzzard-67111945 | kibuzzard-67111945 |
| 1 | G*** | kibuzzard-670E91C7 | kibuzzard-670E91C7 |
| 1 | G*** | kibuzzard-69CEE455 | kibuzzard-69CEE455 |
| 1 | G*** | kibuzzard-67111882 | kibuzzard-67111882 |
| 1 | G*** | kibuzzard-67111937 | kibuzzard-67111937 |
| 1 | G*** | kibuzzard-671188EA | kibuzzard-671188EA |
| 1 | G*** | kibuzzard-6711AB8A | kibuzzard-6711AB8A |
| 1 | G*** | kibuzzard-671188B5 | kibuzzard-671188B5 |
| 1 | G*** | kibuzzard-69CEEB52 | kibuzzard-69CEEB52 |
| 1 | G*** | kibuzzard-670E8F90 | kibuzzard-670E8F90 |
| 1 | G*** | kibuzzard-69CEE1A3 | kibuzzard-69CEE1A3 |
| 1 | G*** | kibuzzard-69CFD081 | kibuzzard-69CFD081 |
| 1 | Jumper Blue | xtech:SNT-100-BL-H | U73 |
| 1 | Jumper Red | xtech:SNT-100-RD-G | U72 |
| 1 | ME6203A50M3G | easyeda2kicad:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | U1 |
| 1 | PDZ3.3B,115 | Diode_SMD:D_SOD-323 | D23 |
| 1 | R | Resistor_SMD:R_1206_3216Metric | R22 |
| 1 | SS54 | Diode_SMD:D_SMA | D3 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J3 |
The 158 most common of 164 parts.
Questions
How big is the Hw charger PCB?
It measures 100 × 65 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Hw charger use?
164 parts, built around the BQ25756RRVR, ME6203A50M3G, BSC0702LS and VS-2EFH02HM3/I. 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 Hw charger KiCad files?
From the xtech/hw-module-charger repository on GitHub, at the commit this page was made from: the board is hw-charger.kicad_pcb and its schematic Charger.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hw charger design in my own project?
Its repository states no licence, so its author keeps all rights: ask xtech before reusing the design.
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