4 layers32 × 45 mm
PumpV2schematic
mattgp32/Low-Cost-Insulin-Pump-V2.1
A repository to store all the software files used for the BT Insulin Pump
90 parts1
4 layers100 × 50 mm
A repository to store PSU-EXT hardware design assets, schematics, circuit diagrams, CAD files and manufacturing data.
- Size
- 100 × 50 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 137
- Nets
- 93
- Pads
- 388
- Tracks, vias
- 601, 119
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 7 Aug 2026
- Updated
- 29 Oct 2026
Overview
Psu ext is an open-source printed circuit board by PSU-Ext-Org, from the PSU-Ext-Org/psu-ext-hardware repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 4-layer board of 100 × 50 mm with 137 parts on 93 nets, routed with 601 tracks and 119 vias.
It is built around the ESP32-S3-WROOM-1-N8, RFM-0505S and ADS1115IDGS, with the INA240A2D, LM321 and W25Q16JVSSIQ among its other parts. Its parts include 46 resistors, 38 capacitors, 12 ICs, 12 diodes and 3 connectors. It belongs with the power boards and the ESP32 boards of this library.
Main components
12
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 Modules
RFM-0505S
SIP,11.5x6mmIsolated Power ModulesYLPTEC
ADS1115IDGS
MSOP10Ultra-Small, Low-Power, 4 Channels 16-Bit Analog-to-Digital Converter with Internal ReferenceTexas InstrumentsUncategorised
INA240A2D
SOIC-8-40℃~+125℃ -4V~80V 1 1.8mA 132dB 2.7V~5.5V 250nV/℃ 2V/us 400kHz 40nV/√Hz@1kHz 50V/V 5uV 90uA Bidirectional detection、Zero drift / auto-zero、Programmable output reference level、Analog output interface ±80V SOIC-8 Current Sense Amplifiers ROHSTexas InstrumentsCurrent Sense Amplifiers
LM321
SOT-23-50℃~+70℃ 1 2mV 3nA 400V/ms 40mA 430uA 45nA 90dB SOT-23-5 Operational Amplifier ROHSPJSEMIOperational Amplifier
W25Q16JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
LD1117S33
SOT-2230℃~+125℃@(Tj) 1 1.1V@(800mA) 100uV 15V 3.3V 5mA 75dB@(120Hz) 800mA Fixed Over Current Protection、Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsISO1540D
SOIC-8-40℃~+125℃ 2500 50kV/us Bidirectional Bidirectional automatic direction、Open-drain buffer output SOIC-8 I2C Isolators ROHSTexas InstrumentsI2C Isolators
LM2664M6
SOT-23-6-40℃~+85℃ -5.5V~-1.8V 1.8V~5.5V 12Ω 40mA 500uA 80kHz 91% Inverted Not supported SOT-23-6 Charge Pumps ROHSTexas InstrumentsCharge PumpsTSZ122IYDT
SO-8-40℃~+125℃ 0.19V/us 1.8V~5.5V 10nV/℃ 122dB 1uV 2 28uA 400kHz 400pA 60nV/√Hz@1kHz 70pA 7mA Rail-to-Rail Input, Rail-to-Rail Output Zero drift / auto-zero、ESD protection SO-8 Precision Op Amps ROHSSTMicroelectronicsPrecision Op AmpsUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
ESD5Z3.3T1G
SOD-523-55℃~+125℃ 1 110pF 11A 14V 150W 200nA 3.3V 5V ESD IEC 61000-4-2、IEC 61000-4-4 Unidirectional SOD-523 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
Parts
137| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2, C10, C13, C15, C17, C19, C20, C22, C23, C24, C26, C27, C28, C32, C33, C34 +1 |
| 8 | 10k | Resistor_SMD:R_0805_2012Metric | R5, R10, R11, R14, R19, R20, R21, R29 |
| 6 | 22R | Resistor_SMD:R_0805_2012Metric | R15, R16, R17, R18, R22, R23 |
| 6 | 4.7k | Resistor_SMD:R_0805_2012Metric | R6, R7, R12, R13, R27, R28 |
| 5 | 1k | Resistor_SMD:R_0805_2012Metric | R8, R9, R33, R45, R46 |
| 5 | 20k | Resistor_SMD:R_0805_2012Metric | R31, R41, R42, R43, R44 |
| 5 | ESD5Z3.3T1G | Diode_SMD:D_SOD-523 | D5, D6, D7, D8, D9 |
| 5 | LED | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D14 |
| 4 | 160k | Resistor_SMD:R_0805_2012Metric | R37, R38, R39, R40 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_4.3mm_M4_ISO7380_Pad | H8, H9, H10, H11 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H1, H2, H3, H4 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C6, C12, C36 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric | C35, C37, C38 |
| 3 | 2k | Resistor_SMD:R_0805_2012Metric | R3, R4, R32 |
| 3 | MountingHole | MountingHole:ToolingHole_1.152mm | H5, H6, H7 |
| 2 | 10nF | Capacitor_SMD:C_0805_2012Metric | C30, C31 |
| 2 | 10uF | Capacitor_SMD:C_1206_3216Metric | C5, C11 |
| 2 | 12pF | Capacitor_SMD:C_0805_2012Metric | C14, C18 |
| 2 | 1nF | Capacitor_SMD:C_0805_2012Metric | C21, C25 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric | C1, C16 |
| 2 | 330p | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7, C8 |
| 2 | 4.7R | Resistor_SMD:R_0805_2012Metric | R24, R25 |
| 2 | 47uF | Capacitor_SMD:CP_Elec_5x5.9 | C3, C9 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | LD1117S33 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3, U4 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW1, SW2 |
| 1 | -3V3 | TestPoint:TestPoint_Pad_D1.5mm | TP7 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric | R30 |
| 1 | 1.5k | Resistor_SMD:R_0805_2012Metric | R35 |
| 1 | 10R | Resistor_SMD:R_0805_2012Metric | R36 |
| 1 | 10mR | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R26 |
| 1 | 220nF | Capacitor_SMD:C_0805_2012Metric | C29 |
| 1 | 330R | Resistor_SMD:R_0805_2012Metric | R34 |
| 1 | ADS1115IDGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U8 |
| 1 | AP2151DWG-7 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U5 |
| 1 | FC-135_32.7680KA-A0 | snapeda-footprints:XTAL_FC-135_32.7680KA-A0 | Y1 |
| 1 | HF49FD_005-1H12T | snapeda-footprints:RELAY_HF49FD_005-1H12T | K1 |
| 1 | INA240A2D | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | ISO1540 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | LL4148 | Diode_SMD:D_MiniMELF | D15 |
| 1 | LM2664M6 | Package_TO_SOT_SMD:SOT-23-6 | U12 |
| 1 | LM321 | Package_TO_SOT_SMD:SOT-23-5 | U9 |
| 1 | LOGO | footprints-oshw:logo_oshw_22x13.2mm | G1 |
| 1 | LOGO | footprints-maxeelabs:logo_20x11.2mm | G2 |
| 1 | MMBT2222A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | RFM-0505S | snapeda-footprints:CONV_RFM-0505S | PS1 |
| 1 | SMBJ36A | Diode_SMD:D_SMB | D13 |
| 1 | TSZ122IYDT | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U11 |
| 1 | TYPE-C-31-M-12 | snapeda-footprints:HRO_TYPE-C-31-M-12 | J1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | U_ER | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | V3.3 | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | V3.3F | TestPoint:TestPoint_Pad_D1.5mm | TP6 |
| 1 | V5F | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | V_IN | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | V_USB | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | W25Q16JVSS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U6 |
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Questions
How big is the Psu ext PCB?
It measures 100 × 50 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Psu ext use?
137 parts, built around the ESP32-S3-WROOM-1-N8, RFM-0505S, ADS1115IDGS and INA240A2D. 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 Psu ext KiCad files?
From the PSU-Ext-Org/psu-ext-hardware repository on GitHub, at the commit this page was made from: the board is electronics/psu-ext.kicad_pcb and its schematic electronics/esp32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Psu ext design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).