2 layers69 × 72 mm
MMv3
MrCroesus/MMv3
MMv3 is the 3rd generation robot platform used to teach the IEEE Micromouse DeCal at UC Berkeley. It was designed with usability, manufacturability, size, and cost in mind.
47 parts16Apache-2.0
2 layers60 × 44 mm
Resistive BMS-4s
c3am/resistive-BMS1an open source 4s BMS based on the CH32V003 microcontroller
- Size
- 60 × 44 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 64
- Nets
- 44
- Pads
- 448
- Tracks, vias
- 310, 77
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 Apr 2025
- Updated
- 7 May 2025
Overview
Resistive BMS-4s is an open-source printed circuit board by c3am, from the c3am/resistive-BMS repository on GitHub. It is a 2-layer board of 60 × 44 mm with 64 parts on 44 nets, routed with 310 tracks and 77 vias.
It is built around the ADS1115IDGS, AMS1117-5.0 and DMG2302U, with the DMG2301L among its other parts. Its parts include 21 resistors, 15 transistors, 9 capacitors, 9 connectors and 5 ICs. It belongs with the power boards and the RISC-V boards of this library.
Main components
4
ADS1115IDGS
MSOP10Ultra-Small, Low-Power, 4 Channels 16-Bit Analog-to-Digital Converter with Internal ReferenceTexas InstrumentsUncategorised
AMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
DMG2302U
SOT-23-55℃~+150℃ 1 N-channel 120mΩ@4.5V 1V 20V 4.2A 57.7pF 594.3pF 64.5pF 7nC@4.5V 800mW SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETsDMG2301L
SOT-23-55℃~+150℃ 1 P-Channel 1.2V 1.5W 150mΩ@2.5V 20V 3A 5.5nC@4.5V P-Channel SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
README
README.mdThis is a low cost 4s BMS (battery management system) based on the ch32v003 microcontroller. features:
- Cell voltage measurement using an ads1115 16bit adc
- high side bidirectional current sensing using the ina181a2 current sense amplifier
- charge/discharge enable using low side mosfets
- 20Ohm resistive balancing (-> 200mA at 4V -> 0.8W)
- I/O: 1x Uart, 1x SWIO (for programming)
This BMS is still under development and I haven't even tested it yet.
Parts
64| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100k | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R9, R11, R12, R13, R14, R17, R18, R21 |
| 6 | DMG2302U | Package_TO_SOT_SMD:SOT-23 | Q4, Q5, Q6, Q7, Q13, Q15 |
| 5 | 10u | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7, C8, C9 |
| 5 | DMG2301L | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q12, Q14 |
| 4 | 100u | Capacitor_SMD:C_1206_3216Metric | C1, C2, C3, C4 |
| 4 | 20 | Resistor_SMD:R_2512_6332Metric | R1, R2, R3, R4 |
| 4 | Conn_01x01 | my-footprints:pad-6x6mm | J6, J7, J8, J9 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | Q_NMOS_SGD | my-footprints:PQFN-8-EP_6x5mm_P1.27mm_Generic | Q8, Q9, Q10, Q11 |
| 3 | Conn_01x01 | my-footprints:pad-4x3mm | J1, J4, J5 |
| 2 | 4m | Resistor_SMD:R_2512_6332Metric | R19, R20 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | 220k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 330k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | ADS1115IDGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U2 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | CH32V003FxUx | Package_DFN_QFN:QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | INA181 | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | REF3025 | Package_TO_SOT_SMD:SOT-23 | U4 |
The 63 most common of 64 parts.
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Questions
How big is the Resistive BMS-4s PCB?
It measures 60 × 44 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Resistive BMS-4s use?
64 parts, built around the ADS1115IDGS, AMS1117-5.0, DMG2302U and DMG2301L. 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 Resistive BMS-4s KiCad files?
From the c3am/resistive-BMS repository on GitHub, at the commit this page was made from: the board is resistive-BMS-4s/resistive-BMS-4s.kicad_pcb and its schematic resistive-BMS-4s/resistive-BMS-4s.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Resistive BMS-4s design in my own project?
Its repository states no licence, so its author keeps all rights: ask c3am before reusing the design.