2 layers160 × 80 mm
2 layers151 × 118 mm
OBQAS
diminDDL/OBQAS1Open Battery Quantification and Analysis System
- Size
- 151 × 118 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 204
- Nets
- 162
- Pads
- 607
- Tracks, vias
- 1,427, 1,266
- Pours
- 24
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 20 Jan 2022
- Updated
- 21 Dec 2022
Overview
OBQAS is an open-source printed circuit board by diminDDL, from the diminDDL/OBQAS repository on GitHub, published under the MIT licence. It is a 2-layer board of 151 × 118 mm with 204 parts on 162 nets, routed with 1,427 tracks and 1,266 vias.
It is built around the CH340C, ESP32-WROOM-32 and LM358, with the ADS1115IDGS, MCP4921-E/P and MT3608 among its other parts. Its parts include 89 resistors, 32 capacitors, 16 ICs, 14 transistors and 8 connectors. It belongs with the ESP32 boards of this library.
Main components
12
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
ADS1115IDGS
MSOP10Ultra-Small, Low-Power, 4 Channels 16-Bit Analog-to-Digital Converter with Internal ReferenceTexas InstrumentsUncategorised
MCP4921-E/P
PDIP-8-40℃~+125℃ 1 12 12LSB 2.7V~5.5V 4.5us Integrated buffer、Power-on reset、Power-down mode、Programmable gain SPI Voltage Buffer PDIP-8 Digital to Analog Converters (DAC) ROHSMicrochip TechnologyDigital To Analog Converters (DAC)
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC Converters
PCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O ExpandersHY2213-BB3A
SOT-23-6-40℃~+85℃ 1 1.5V~8V 2uA 4.19V Balancing IC Lithium Battery Not supported SOT-23-6 Battery Management ROHSHYCON TechBattery Management
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
IRLML2803TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.2A 250mΩ@10V 30V 400mV 540mW 5nC@10V 85pF N-Channel SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
G5NB-1A-E DC5
插件,20.4x7mm-40℃~+85℃ 1 Set Normally Open: 1A (SPST NO) 100mΩ 10ms 10ms 125Ω 200mW 30V@DC、250V@AC 3A@30VDC、5A@250VAC 4 5A 5V Non-Polarized - Single Coil Silver Alloy (Cd-Free) 插件,20.4x7mm Power Relays ROHSOmronPower RelaysBC846
SOT-23-65℃~+150℃ 1 NPN 100mA 110 15nA 250mW 400mV 65V 6V 770MHz NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdOBQAS
Open Battery Quantification and Analysis System
A high efficiency high power imax alternative.
Features include:
- up to 5 Li-ion cells (22 Vout max)
Supported battery types:
- Li-ion (with balancing)
- Ni-mh
- Ni-cd
- Pb
- More...
Ratings:
- Maximum output voltage - 22V
- Maximum charging current - 5A
- Maximum charging power: ~100W
Discharge:
- Maximum input voltage - 22V
- Maximum discharging current - 3A (up to 5A with a better MOSFET)
- Maximum discharging power: ~75W
Input voltage: 12-24V
Topology: buck-boost synchronous (TPS55288)
Additional features: 20x4 display with encoder USB-C for data logging and remote control/outputs 5V 1A SD card holds configuration parameters/standalone data logging Thermocopule for battery monitoring ESP32 - WiFI/BLE
Pictures
Parts
204| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5, R14, R16, R17, R18, R19, R20, R21, R22, R27, R34, R38, R39, R44 +13 |
| 11 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C9, C19, C20, C22, C25, C27, C28, C29, C30, C31 |
| 9 | IRLML2803TRPBF | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q10, Q11, Q12, Q13, Q14 |
| 8 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C8, C15, C16, C23, C24, C26 |
| 8 | 50k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R26, R33, R43, R68, R70, R86, R88 |
| 7 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R6, R11, R12, R13, R54 |
| 6 | 49.9k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23, R35, R40, R46, R52, R58 |
| 5 | 10 | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R79, R80, R83, R84, R85 |
| 5 | 1N4001 | Diode_SMD:D_SOD-123 | D2, D3, D4, D5, D6 |
| 5 | HY2213-BB3A | HY2213:SOT95P280X140-6N | U13, U14, U15, U16, U17 |
| 4 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R76, R77, R78, R81 |
| 4 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R45, R47, R53, R56 |
| 4 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R25, R51, R63 |
| 4 | 2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R41, R42, R49, R50 |
| 4 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8, R64, R65 |
| 4 | G5NB-1A-E_DC5 | relay:G5NB-1A-E DC5 | K1, K2, K3, K4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 10mOhm | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R32, R36, R48 |
| 2 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11, C13 |
| 2 | 1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24, R28 |
| 2 | 100p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C17 |
| 2 | 20k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R30, R72 |
| 2 | 220u | Capacitor_SMD:CP_Elec_6.3x9.9 | C3, C21 |
| 2 | BC846 | Package_TO_SOT_SMD:SOT-23 | Q5, Q6 |
| 2 | EN | TestPoint:TestPoint_Pad_D2.5mm | TP6, TP13 |
| 2 | IRLZ44N | Package_TO_SOT_THT:TO-220F-3_Horizontal_TabUp | Q7, Q8 |
| 2 | LM358 | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U6, U7 |
| 1 | +3V3 | TestPoint:TestPoint_Pad_D2.5mm | TP4 |
| 1 | +5V | TestPoint:TestPoint_Pad_D2.5mm | TP3 |
| 1 | 0 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R37 |
| 1 | 0.01u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 100 | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R82 |
| 1 | 1000u | Capacitor_SMD:CP_Elec_10x10 | C6 |
| 1 | 1000u | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C32 |
| 1 | 100mOhm | Resistor_THT:R_Axial_Power_L20.0mm_W6.4mm_P30.48mm | R59 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R55 |
| 1 | 1N5408 | Diode_THT:D_DO-201AD_P15.24mm_Horizontal | D1 |
| 1 | 22uH | Inductor_SMD:L_6.3x6.3_H3 | L2 |
| 1 | 24V MAX | Connector_AMASS:AMASS_XT60-F_1x02_P7.20mm_Vertical | J1 |
| 1 | 4.7u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C18 |
| 1 | 4.7uH | Inductor_THT:L_Radial_D29.8mm_P29.30mm_Murata_1400series | L1 |
| 1 | 4700p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C14 |
| 1 | 47u | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C12 |
| 1 | 47u | Capacitor_SMD:CP_Elec_8x6.9 | C7 |
| 1 | 5.1k(NC) | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 56.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R31 |
| 1 | ADC_READY | TestPoint:TestPoint_Pad_D2.5mm | TP9 |
| 1 | ADS1115IDGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U9 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | CH1 | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | J6 |
| 1 | CH2 | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | J7 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | Conn_01x03 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J4 |
| 1 | Conn_01x04 | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J8 |
| 1 | Conn_01x05 | Connector_JST:JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J9 |
| 1 | Conn_01x06 | Connector_JST:JST_XH_B6B-XH-A_1x06_P2.50mm_Vertical | J10 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U3 |
| 1 | Enc | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW2 |
| 1 | FB_INT | TestPoint:TestPoint_Pad_D1.0mm | TP15 |
| 1 | Fuse | Fuse:Fuse_Blade_ATO_directSolder | F1 |
| 1 | GND | TestPoint:TestPoint_Pad_D2.5mm | TP16 |
| 1 | IO0 | TestPoint:TestPoint_Pad_D2.5mm | TP5 |
| 1 | IRFP064 | Package_TO_SOT_THT:TO-247-3_Horizontal_TabUp | Q9 |
| 1 | Jumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP1 |
| 1 | K type | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | J3 |
| 1 | LCD | LCD:LCD-20x4 | DISP1 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | LM7824_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U12 |
| 1 | MCP4921 | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | MT3608 | Package_TO_SOT_SMD:SOT-23-6 | U11 |
| 1 | OPT | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29 |
| 1 | OUT | TestPoint:TestPoint_Pad_D2.5mm | TP18 |
| 1 | PCF8574 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U10 |
| 1 | RX | TestPoint:TestPoint_Pad_D2.5mm | TP7 |
| 1 | SCL | TestPoint:TestPoint_Pad_D2.5mm | TP10 |
| 1 | SDA | TestPoint:TestPoint_Pad_D2.5mm | TP11 |
| 1 | SENS_VN | TestPoint:TestPoint_Pad_D2.5mm | TP2 |
| 1 | SENS_VP | TestPoint:TestPoint_Pad_D2.5mm | TP1 |
| 1 | SW1 | TestPoint:TestPoint_Pad_D2.5mm | TP14 |
The 195 most common of 204 parts.
Questions
How big is the OBQAS PCB?
It measures 151 × 118 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OBQAS use?
204 parts, built around the CH340C, ESP32-WROOM-32, LM358 and ADS1115IDGS. 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 OBQAS KiCad files?
From the diminDDL/OBQAS repository on GitHub, at the commit this page was made from: the board is OBQAS/OBQAS.kicad_pcb and its schematic OBQAS/OBQAS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OBQAS 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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