4 layers47 × 59.7 mm
Tackle sensor hardware
Celnardur/rfc_tackle_sensor
Open a git bash terminal in the directory of your choosing and call the following command:
79 parts3MIT
2 layers58 × 58 mm
Ups lead acid electgpl v1.0
electgpl/MiniUPS12VLead-AcidThis project implements a mini uninterruptible power supply (UPS) designed for 12V Lead-Acid AGM/GEL batteries. It integrates a dedicated CN3767 lead-acid charger, a PMOS + Schottky bypass circuit, a TPS54360 buck…
- Size
- 58 × 58 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 42
- Pads
- 240
- Tracks, vias
- 171, 288
- Pours
- 20
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Aug 2025
- Updated
- 25 Aug 2025
Overview
Ups lead acid electgpl v1.0 is an open-source printed circuit board by electgpl, from the electgpl/MiniUPS12VLead-Acid repository on GitHub. It is a 2-layer board of 58 × 58 mm with 78 parts on 42 nets, routed with 171 tracks and 288 vias.
It is built around the TPS54360DDA, CN3767 and LM393, with the TL431AIDBZR, AO4407 and SS54 among its other parts. Its parts include 26 resistors, 19 capacitors, 6 diodes, 5 transistors and 4 ICs. It belongs with the power boards of this library.
Main components
9
TPS54360DDA
SOIC-8-EP-40℃~+150℃@(TJ) 1 146uA 2.5MHz 3.5A 4.5V~60V 800mV~58.8V Adjustable Buck Buck Built-in No SOIC-8-EP DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
CN3767
SSOP-10-150mil-40℃~+85℃ 14.8V 4A 52uA 6.6V~30V Charging IC Lead-Acid Battery Not supported SSOP-10-150mil Battery Management ROHSShangHai Consonance ElecBattery Management
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
TL431AIDBZR
SOT-23-40℃~+85℃ 100mA 2.495V~36V 2.495V~36V 2uA 400uA Adjustable Parallel ±1% SOT-23 Voltage Reference ROHSNexperiaVoltage ReferenceAO4407
SOP-8-55℃~+150℃ 1 P-Channel 1.75nF 10A 180pF 2.1W 20mΩ@4.5V 24nC@15V 30V 3V SOP-8 MOSFETs ROHSJSMSEMIMOSFETs
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
DMP4051LK3-13(ES)
TO-252TO-252 MOSFETs ROHSElecSuperMOSFETs
MBRD20100CT
TO-252-2-55℃~+175℃ 1 Pair Common Cathode 100V 100uA@100V 10A 150A 790mV@10A TO-252-2 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
NTF6P02
SOT-223-55℃~+150℃ 1 P-Channel 1.2nF 10A 150pF 1V 20V 44mΩ@4.5V 500pF 8.3W P-Channel SOT-223 MOSFETs ROHSonsemiMOSFETs
README
README.mdMini UPS 12V Lead-Acid | UVP Protector - Buck - Charger - Bypass
This project implements a mini uninterruptible power supply (UPS) designed for 12V Lead-Acid AGM/GEL batteries.
It integrates a dedicated CN3767 lead-acid charger, a PMOS + Schottky bypass circuit, a TPS54360 buck regulator, and an undervoltage protection (UVP) stage to ensure safe battery operation.
The design focuses on maintaining stable 12V output while protecting the battery from undervoltage damage and ensuring correct charging cycles.
🔑 Features
- Battery chemistry supported: 12V Lead-Acid (AGM, GEL).
- CN3767-based lead-acid charger with constant-current/constant-voltage (CC/CV) charging.
- Bypass system:
- PMOS + Schottky switch circuit.
- During charging, disconnects the battery from the load to allow proper charging.
- The load is powered instead by a regulated buck supply.
- Buck regulator stage:
- Based on TPS54360 DC/DC converter.
- Configured to 13.8V output for stable system powering during battery charge.
- Undervoltage protection (UVP):
- Implemented with LM393 comparator and TL431 reference.
- Controls a back-to-back PMOS switch.
- Cuts off the battery when voltage falls below 11V.
- Latch-off behavior: system remains disconnected until external power is restored.
- 2-layer PCB, designed for compact size, thermal management, and robust operation.
📂 Repository structure
- /schematic/ → Circuit schematic files.
- /pcb/ → PCB layout files ready for fabrication.
- /doc/ → Technical notes and design explanation.
- /img/ → PCB renders and prototype photos.
🔧 Typical applications
- DIY 12V backup supply for small systems.
- Router, modem, or IoT device UPS.
- Low-power embedded controllers requiring uninterrupted 12V operation.
- Safe battery-powered test benches.
📑 References
- CN3767 Datasheet (Consonance)
- TPS54360 Datasheet (Texas Instruments)
- LM393 Datasheet (Texas Instruments)
- TL431 Reference Datasheet (Texas Instruments)
📸 Project preview
(Insert here PCB renders and/or real prototype images)
⚖️ License
This project is released under the MIT License.
You are free to use, modify, and distribute it, provided that proper credit is given.
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistor_SMD:R_0603_1608Metric | R12, R16, R22, R23, R24, R26 |
| 6 | 47u | Capacitor_SMD:C_0805_2012Metric | C8, C9, C10, C11, C12, C17 |
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C5, C13, C14, C16, C18 |
| 4 | 2u2 | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R8, R11, R15 |
| 3 | 47k | Resistor_SMD:R_0603_1608Metric | R17, R18, R19 |
| 3 | 500/24N | Fuse:Fuse_2920_7451Metric | F1, F2, F3 |
| 3 | Screw_Terminal_01x02 | TerminalBlock_RND:TerminalBlock_RND_205-00232_1x02_P5.08mm_Horizontal | J2, J3, J4 |
| 2 | 10u | Inductor_SMD:L_Taiyo-Yuden_NR-60xx | L1, L2 |
| 2 | AO4407 | Package_SO:SOP-8_3.9x4.9mm_P1.27mm | Q4, Q5 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D3, D4 |
| 2 | SS54 | Diode_SMD:D_SMC | D1, D6 |
| 2 | TestPoint_Alt | TestPoint:TestPoint_Bridge_Pitch5.08mm_Drill1.3mm | TP10, TP11 |
| 1 | 0R12 | Resistor_SMD:R_2512_6332Metric | R14 |
| 1 | 10R | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C19 |
| 1 | 120R | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 16k9 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 220n | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 243k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | 2k2 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 360k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 442k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 47p | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 49R9 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 4k7 | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 4n7 | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 5V1 | Diode_SMD:D_SOD-123 | D2 |
| 1 | 90k9 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | CN3767 | Package_SO:SSOP-10_3.9x4.9mm_P1.00mm | U2 |
| 1 | DMP4051LK3-13 | Package_TO_SOT_SMD:TO-252-2 | Q1 |
| 1 | LM393 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | LOGO | EXO_LIB_GIT:Recognized Component very small | G*** |
| 1 | MBRD20100CT | Package_TO_SOT_SMD:TO-252-2 | D5 |
| 1 | MPPT | Jumper:SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | NTF6P02 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | Q2 |
| 1 | TL431AIDBZR | Package_TO_SOT_SMD:SOT-23 | U3 |
| 1 | TPS54360DDA | Package_SO:HSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.1mm_ThermalVias | U1 |
The 77 most common of 78 parts.
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Questions
How big is the Ups lead acid electgpl v1.0 PCB?
It measures 58 × 58 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ups lead acid electgpl v1.0 use?
78 parts, built around the TPS54360DDA, CN3767, LM393 and TL431AIDBZR. 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 Ups lead acid electgpl v1.0 KiCad files?
From the electgpl/MiniUPS12VLead-Acid repository on GitHub, at the commit this page was made from: the board is Hardware/ups_lead_acid_electgpl_v1.0.kicad_pcb and its schematic Hardware/battery_protect.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ups lead acid electgpl v1.0 design in my own project?
Its repository states no licence, so its author keeps all rights: ask electgpl before reusing the design.