4 layers99 × 60 mm
Grip strength meter
houseofbigseals/grip_strength_meter_pcb
schematic and pcb for custom esp32 grip strength meter project
123 parts
4 layers69 × 39 mm
JPBms2
jakepoz/jpbms2JPBms is a simple BMS for solar charging and balancing a 3-cell lithium ion battery.
- Size
- 69 × 39 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 132
- Nets
- 113
- Pads
- 385
- Tracks, vias
- 936, 209
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Apr 2024
- Updated
- 20 Jul 2024
Overview
JPBms2 is an open-source printed circuit board by jakepoz, from the jakepoz/jpbms repository on GitHub. It is a 4-layer board of 69 × 39 mm with 132 parts on 113 nets, routed with 936 tracks and 209 vias.
It is built around the L6388ED, ZXCT1107SA and ST715M25R, with the SK2301AW, AO3400A and AO3401A among its other parts. Its parts include 56 resistors, 21 transistors, 20 capacitors, 14 diodes and 5 ICs. It belongs with the power boards and the STM32 boards of this library.
Main components
11
L6388ED
SO-8-45℃~+125℃ 17V 2 350uA 400mA 40ns 650mA 70ns Half-Bridge IGBT、MOSFET Under Voltage Protection SO-8 Gate Drivers ROHSSTMicroelectronicsGate Drivers
ZXCT1107SA
SOT-23-40℃~+125℃ 0V~0.5V 19nA 2.5V~36V 2.5V~36V 3uA 650kHz High-side detection、Analog output interface SOT-23 Current Sense Amplifiers ROHSDiodes IncorporatedCurrent Sense Amplifiers
ST715M25R
SOT-23-5-40℃~+125℃@(Tj) 1 2.5V 210uVrms 24V 3.75uA 500mV@(85mA) 62dB@(100kHz) 85mA Fixed Positive Short Circuit Protection SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SK2301AW
SOT-323-55℃~+150℃ 1 P-Channel 10nC@10V 110mΩ@4.5V 1V 20V 350mW 3A 405pF 55pF SOT-323 MOSFETs ROHSShikuesMOSFETsAO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsAO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsBAT54SW
SOT-3231 Pair Series Connection 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-323 Schottky Diodes ROHSNexperiaSchottky Diodes
H5VL10B
DFN1006-2L-55℃~+125℃ 1 100nA 10V 15pF 5.6V 50W 5A 5V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 DFN1006-2L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
SMAJ16A
DO-214AC(SMA)-65℃~+150℃ 15.4A 15.4uA 16V 17.8V 26V 400W TVS Unidirectional DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSLittelfuseESD And Surge Protection (TVS/ESD)SMAJ30CA
DO-214AC(SMA)-55℃~+150℃ 1 30V 33.3V 400W 48.4V 5uA 8.3A Bidirectional TVS DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSGOODWORKESD And Surge Protection (TVS/ESD)
XT30PW-M
-- Power connector / plug connector ROHSChangzhou Amass ElecUncategorised
README
README.mdJPBms
JPBms is a simple BMS for solar charging and balancing a 3-cell lithium ion battery.
The key thing about it is that it uses no custom ICs, beyond a basic microcontroller. That is to say that it depends on no hard-to-find custom ICs that will be obsolete 3 years from now. It implements a basic charging circuit that can charge a ~12V 3S battery from basically any input power source between 6V-24V, including if that source is a solar panel.
- STM32L053 microcontroller
- It's just an inductor with a full set of switches on it, so you can customize it
- Simple resistive balancing
- Single layer board design for easy JLCPCB style production
- ~$150 to order 5 from JLCPCB, way cheaper in bulk
- Low ~100uA quiescent current
- XT30 solar panel connector, JST-XH battery balance connector
Parts
132| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 1M | Resistor_SMD:R_0603_1608Metric | R10, R11, R19, R20, R21, R25, R26, R27, R34, R35, R38, R40, R44, R45, R47, R49 +5 |
| 10 | .1u | Capacitor_SMD:C_0603_1608Metric | C7, C9, C10, C11, C12, C13, C14, C17, C21, C22 |
| 8 | 150 | Resistor_SMD:R_0402_1005Metric | R12, R13, R14, R31, R32, R41, R42, R43 |
| 7 | 1k | Resistor_SMD:R_0603_1608Metric | R22, R23, R24, R33, R46, R50, R53 |
| 7 | 2N7002 | Package_TO_SOT_SMD:SOT-323_SC-70 | Q8, Q9, Q10, Q13, Q16, Q19, Q20 |
| 7 | 75 | Resistor_SMD:R_0603_1608Metric | R15, R16, R17, R18, R48, R55, R56 |
| 6 | SK2301AW | Package_TO_SOT_SMD:SOT-323_SC-70 | Q11, Q12, Q14, Q15, Q17, Q18 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric | C2, C3, C4, C8 |
| 4 | 1u | Capacitor_SMD:C_0603_1608Metric | C15, C16, C19, C20 |
| 4 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 4 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q5, Q6, Q7, Q21 |
| 4 | BAT54SW | Package_TO_SOT_SMD:SOT-323_SC-70 | D1, D2, D3, D18 |
| 4 | LED_Y | LED_SMD:LED_0603_1608Metric | D5, D11, D12, D13 |
| 3 | 100 | Resistor_SMD:R_1206_3216Metric | R28, R29, R30 |
| 3 | 30V 750mA | Fuse:Fuse_1206_3216Metric | F1, F2, F3 |
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R2, R37 |
| 2 | H5VL10B | Diode_SMD:D_SOD-882 | D7, D8 |
| 2 | L6388E | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U4, U6 |
| 2 | TestPoint | TestPoint:TestPoint_Loop_D2.60mm_Drill1.6mm_Beaded | TP5, TP6 |
| 1 | +BATT | TestPoint:TestPoint_Loop_D2.60mm_Drill1.6mm_Beaded | TP2 |
| 1 | 0.1 | Resistor_SMD:R_1206_3216Metric | R3 |
| 1 | 10M | Resistor_SMD:R_0603_1608Metric | R39 |
| 1 | 10p | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 1600 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 18k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 3k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 47u | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 47uH | Inductor_SMD:L_Sunlord_MWSA0605S | L1 |
| 1 | 56k | Resistor_SMD:R_0603_1608Metric | R36 |
| 1 | 7500 | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | Conn_01x04 JST-XH | JakeLib:JST_XH_S4B-XH-A_1x04_P2.50mm_Horizontal_Tight | BAL1 |
| 1 | Conn_01x04 Picoblade | Connector_Molex:Molex_PicoBlade_53398-0471_1x04-1MP_P1.25mm_Vertical | UART1 |
| 1 | Conn_ARM_SWD_TagConnect_TC2030 | Connector:Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J2 |
| 1 | GND | TestPoint:TestPoint_Loop_D2.60mm_Drill1.6mm_Beaded | TP1 |
| 1 | LED_G | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | LED_R | LED_SMD:LED_0603_1608Metric | D6 |
| 1 | SMAJ16A | Diode_SMD:D_SMA | D9 |
| 1 | SMAJ30CA | Diode_SMD:D_SMA | D14 |
| 1 | ST715M25R | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | STM32L053R8Tx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U3 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | XT30PW-M | Connector_AMASS:AMASS_XT30PW-M_1x02_P2.50mm_Horizontal | J1 |
| 1 | ZXCT1107 | Package_TO_SOT_SMD:SOT-23 | U1 |
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Questions
How big is the JPBms2 PCB?
It measures 69 × 39 mm and has 4 copper layers, 1.61 mm thick.
What parts does the JPBms2 use?
132 parts, built around the L6388ED, ZXCT1107SA, ST715M25R and SK2301AW. 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 JPBms2 KiCad files?
From the jakepoz/jpbms repository on GitHub, at the commit this page was made from: the board is JPBms2.kicad_pcb and its schematic JPBms2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the JPBms2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask jakepoz before reusing the design.