4 layers100 × 72 mm
4 layers126.1 × 123.7 mm
VaACU
Melih2123/VaACUOpen source; Voltage and Amperage Control Unit, it can take 9-36V, AC 220V and then turn it to the standard: 3.3V, 12V and 5V while charging a battery.
- Size
- 126.1 × 123.7 mm
- Copper layers
- 4
- Thickness
- 1.62 mm
- Parts
- 67
- Nets
- 94
- Pads
- 329
- Tracks, vias
- 530, 87
- Pours
- 52
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Oct 2026
- Updated
- 25 Oct 2026
Overview
VaACU is an open-source printed circuit board by Melih2123, from the Melih2123/VaACU repository on GitHub, published under the MIT licence. It is a 4-layer board of 126.1 × 123.7 mm with 67 parts on 94 nets, routed with 530 tracks and 87 vias.
It is built around the TSR 3-2433N, ESP32-S3-WROOM-1-N8 and ISU0224S24-TR, with the TSR 3-2450N, TMF 05124 and ADP1108AR-5 among its other parts. Its parts include 14 fuses, 11 capacitors, 10 ICs, 10 connectors and 9 diodes. It belongs with the power boards and the ESP32 boards of this library.
Main components
12TSR 3-2433N
SIP-3P,14x7.6mm-40℃~+90℃ 1 10.2mm 1200uF 14mm 1mA 3.3V 3A 4.6V~36V 50mVp-p 7.6mm 850kHz 90% Plastic encapsulated type Short Circuit Protection、Over Current Protection、Under Voltage Protection、Automatic fault recovery Step-down type ±2% SIP-3P,14x7.6mm DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesISU0224S24-TR
-Power Supply Module,Power SuppliesXP Power
TSR 3-2450N
Throughhole-40℃~+90℃ 1 10.2mm 14mm 1mA 3A 50mVp-p 5V 6.5V~36V 7.6mm 820uF 850kHz 92% Plastic encapsulated type Short Circuit Protection、Over Current Protection、Under Voltage Protection、Automatic fault recovery Step-down type ±2% Throughhole DC-DC Power Modules ROHSTRACO POWERDC-DC Power ModulesTMF 05124
DIP,41.2x27.2mm1 208mA 24V 82% DIP,41.2x27.2mm DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
ADP1108AR-5
SOIC-80℃~+70℃ 1 19kHz 2V~30V 5V 90uA Adjustable current limiting Buck-Boost Buck-Boost Built-in Fixed No SOIC-8 DC-DC ConvertersAnalog DevicesDC-DC Converters
LTC4002EDD-4.2#PBF
DFN-10-EP(3x3)-40℃~+85℃ 1 4.05V 4.2V 4.7V~22V 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 DFN-10-EP(3x3) Battery Management ROHSAnalog DevicesBattery ManagementTHL 40-2412WI
-- HWDG ROHSTRACO POWERUncategorised
B330
SMC-55℃~+150℃ 1 Independent 100A 100uA@30V 30V 3A 500mV@3A SMC Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
FDMS86150ET100
Power-56-8-55℃~+175℃ 1 N-channel 100V 128A 187W 29pF 3.055nF 3.9mΩ@10V 3V Power-56-8 MOSFETs ROHSonsemiMOSFETs
RQ6E080AJTCR
TSMT6(SC-95)MOSFETsROHM Semiconductor
SUD45P03-09-GE3
TO-252-2(DPAK)-55℃~+150℃ 1 P-Channel 15mΩ@4.5V 2.5V 2.7nF 30V 41.7W 445pF 45A 515pF 90nC@10V P-Channel ±20V TO-252-2(DPAK) MOSFETs ROHSVishay IntertechnologyMOSFETs
README
README.mdVaACU
Voltage and Amperage Control Unit
VaACU is an open-source power management and battery charging platform designed to integrate multiple power sources into a single, organized system.
It supports 9–36 V DC input and 220 V AC mains input, converting incoming power into regulated 3.3 V, 5 V, and 12 V DC rails while supporting battery charging, power-path management, current monitoring, and protection circuitry.
Key Features
- Multiple power input options
- Regulated 3.3 V, 5 V, and 12 V power rails
- Integrated battery charging and backup power management
- Diode OR-ing for power-source isolation
- Current sensing using the INA293B2
- Fuse-based overcurrent protection
- Battery undervoltage protection
- ESP32-S3-based monitoring and control
- Open-source hardware design developed with KiCad
VaACU aims to provide a modular foundation for embedded systems that need flexible power input, battery backup, and centralized power management.
Status: Hardware design and validation hasnt been done, you the user might have to verify before usage.
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | Fuse | Fuse:Fuse_Blade_ATO_directSolder | F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14 |
| 5 | 2.5V-4.5V | Diode_SMD:D_1206_3216Metric | D4, D5, D7, D8, D9 |
| 4 | Screw_Terminal_01x01 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_360322_1x01_Horizontal_ScrewM3.0_WireProtection | J2, J3, J4, J6 |
| 3 | 0.47µF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C2, C6, C10 |
| 3 | 10µF CER | Capacitor_SMD:C_0402_1005Metric | C4, C8, C9 |
| 3 | 22µF CER | Capacitor_SMD:C_0402_1005Metric | C3, C7, C11 |
| 3 | TSR3-2433N | Converter_DCDC:Converter_DCDC_TRACO_TSR2-24xxN_TSR2-24xxxN_THT | U5, U6, U9 |
| 2 | 5.1K | Resistor_SMD:R_0201_0603Metric | R4, R5 |
| 2 | Screw_Terminal_01x01 | TerminalBlock_Wuerth:Wuerth_REDCUBE-THR_WP-THRSH_74651195_THR | J9, J10 |
| 1 | 0.1µF | Capacitor_SMD:C_0201_0603Metric | C1 |
| 1 | 100 µF (Low-ESR) | Capacitor_SMD:CP_Elec_3x5.3 | C5 |
| 1 | 1N5818 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D6 |
| 1 | 2.2k | Resistor_SMD:R_0201_0603Metric | R2 |
| 1 | 200 | Resistor_SMD:R_0201_0603Metric | R6 |
| 1 | 2k | Resistor_SMD:R_0201_0603Metric | R1 |
| 1 | 47 µH at least 1A saturation | Inductor_SMD:L_6.3x6.3_H3 | L2 |
| 1 | 5V-22V | Diode_SMD:D_1206_3216Metric | D1 |
| 1 | 6.8µH | Inductor_SMD:L_6.3x6.3_H3 | L1 |
| 1 | 68mΩ | Resistor_SMD:R_0201_0603Metric | R3 |
| 1 | 9-36V | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type703_RT10N02HGLU_1x02_P9.52mm_Horizontal | J1 |
| 1 | ADP1108AR-5 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | B330 | Diode_SMD:D_SMC | D3 |
| 1 | BAT | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type703_RT10N02HGLU_1x02_P9.52mm_Horizontal | J5 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U8 |
| 1 | FDMS86150ET100 | Package_TO_SOT_SMD:TDSON-8-1 | Q3 |
| 1 | INA293B2 | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | ISU0224S24 | Converter_DCDC:Converter_DCDC_XP_POWER-ISU02_SMD | U1 |
| 1 | LED | LED_SMD:LED_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D2 |
| 1 | LTC4002EDD-4.2 | Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.646x3.1mm_ThermalVias | U4 |
| 1 | RQ6E080AJ | Package_TO_SOT_SMD:TSOT-23-6 | Q2 |
| 1 | SUD45P03-09 | Package_TO_SOT_SMD:TO-252-2 | Q1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-2P_1x02_P2.54mm_Horizontal | J8 |
| 1 | THL40-2412WI | Converter_DCDC:Converter_DCDC_TRACO_THL40-xxxxWI_THT | U3 |
| 1 | TMF05124 | Converter_ACDC:Converter_ACDC_TRACO_TMF_051xx_THT | PS1 |
| 1 | TSR3-2450N | Converter_DCDC:Converter_DCDC_TRACO_TSR2-24xxN_TSR2-24xxxN_THT | U2 |
| 1 | Thermistor_NTC | Resistor_SMD:R_0603_1608Metric | TH1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J7 |
Questions
How big is the VaACU PCB?
It measures 126.1 × 123.7 mm and has 4 copper layers, 1.62 mm thick.
What parts does the VaACU use?
67 parts, built around the TSR 3-2433N, ESP32-S3-WROOM-1-N8, ISU0224S24-TR and TSR 3-2450N. 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 VaACU KiCad files?
From the Melih2123/VaACU repository on GitHub, at the commit this page was made from: the board is hardware/VaACU.kicad_pcb and its schematic hardware/VaACU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the VaACU design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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