4 layers32.2 × 34.1 mm
4 layers500 × 108.8 mm
Ekspander 100x i2c
kanaboid/elektronikaHaase Industries S3P boards: Arduino IDE code and KiCad schematic.
- Size
- 500 × 108.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 288
- Nets
- 635
- Pads
- 1,540
- Tracks, vias
- 1,875, 374
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 3 Jan 2026
- Updated
- 31 May 2026
Overview
Ekspander 100x i2c is an open-source printed circuit board by kanaboid, from the kanaboid/elektronika repository on GitHub. It is a 4-layer board of 500 × 108.8 mm with 288 parts on 635 nets, routed with 1,875 tracks and 374 vias.
It is built around the ESP32-S3-WROOM-1U-N16R8, MAX3485ED and AP63203WU, with the CP2102N-A02-GQFN20, ITS716G and LTV-847 among its other parts. Its parts include 75 resistors, 52 switches, 43 ICs, 35 capacitors and 34 diodes. It belongs with the ESP32 boards of this library.
Main components
9
ESP32-S3-WROOM-1U-N16R8
SMD,19.2x18mm-103.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3R8 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、I2S、JTAG、USB SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MAX3485ED
SOP-8-40℃~+85℃ 1 1 10Mbps 1mA 3.135V~3.465V 32 Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTC Korea TAEJIN TechRS-485 / RS-422 ICs
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
CP2102N-A02-GQFN20
QFN-20-EP(3x3)-40℃~+85℃ 195uA 3Mbps 3V~3.6V 9.5mA USB 2.0 USB to UART QFN-20-EP(3x3) USB Converters ROHSSilicon LabsUSB Converters
ITS716G
DSO-20DSO-20 Power Distribution Switches ROHSInfineon TechnologiesPower Distribution Switches
LTV-847
DIP-16-30℃~+110℃ 1.2V 100mV@20mA,1mA 200mW 35V 3us 4 4us 50% 50mA 50mA 5kV 600% 6V DC Phototransistor DIP-16 Transistor, Photovoltaic Output Optoisolators ROHSLite-OnTransistor, Photovoltaic Output OptoisolatorsUSBLC6-2SC6
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)
G5Q-1A
Miniature Power RelayOmronUncategorised
USB4145-03-0230-C
SMD-25℃~+85℃ 1 12P 48V 5A Black Female Surface Mount,Vertical Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
README
mikrokontrolery/esp32/s3p/README.mdHaase Industries S3P boards: Arduino IDE code and KiCad schematic.
I'll comment the Arduino sketches properly in a few weeks, but, meanwhile, ask me anything about the code or the schematic on my YouTube video, and I'll be sure to respond to it.
Here's the video about this project: https://youtu.be/9oY4NeJDy-g
Thanks to PCBWay for sponsoring this project! Get $5 of New User Free Credit by following this link - https://pcbway.com/g/x5f10h
PCBWay is one of the most experienced PCB manufacturers in China, consider them your one-stop solution that offers PCB fabrication, turn-key PCB Assembly, PCB design, 3D printing, and CNC machining services.
Parts
288| Qty | Value | Footprint | References |
|---|---|---|---|
| 50 | G5Q-1A | Relay_THT:Relay_SPST_Omron-G5Q-1A | K1, K2, K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K20, K21, K22, K23 +34 |
| 34 | 10K | PCM_Resistor_SMD_AKL:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33 +18 |
| 33 | Red | 1_tme:LEDC2012X120N | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +17 |
| 30 | 2.2K | PCM_Resistor_SMD_AKL:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R45, R46, R47, R48, R49, R50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60 +14 |
| 26 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +10 |
| 24 | ~ | PCM_fab:MountingHole_M3 | H1, H2, H10, H11, H12, H13, H14, H15, H16, H17, H18, H19, H20, H21, H22, H23 +8 |
| 23 | DG127A-5.08-06P-14-00AH | 1_tme:DG127A50806P1400AH | J1, J2, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23 +7 |
| 15 | ITS716G | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U10, U12, U15, U16, U21, U22, U23, U24, U27, U28, U31, U32, U35, U36, U38 |
| 15 | LTV-847 | Package_DIP:DIP-16_W7.62mm | U9, U11, U14, U17, U18, U19, U20, U25, U26, U29, U30, U33, U34, U37, U40 |
| 8 | MCP23017_SP | Package_DIP:DIP-28_W7.62mm | U1, U2, U3, U4, U5, U6, U7, U8 |
| 4 | 330 | Resistor_SMD:R_0805_2012Metric | R14, R18, R19, R20 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6, C8 |
| 2 | 1301.9315 | 1_tme:13019319 | S1, S2 |
| 2 | 4,7K | PCM_Resistor_SMD_AKL:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R17 |
| 2 | 5k1 | Resistor_SMD:R_0805_2012Metric | R10, R15 |
| 1 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C32 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric | R11 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C30 |
| 1 | 1uF_50V | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 22K1 | Resistor_SMD:R_0805_2012Metric | R12 |
| 1 | 4.7u | 1_tme:T491A | C33 |
| 1 | 4.7uH | 1_tme:LSXND6060YEL4R7NMG | L1 |
| 1 | 47K5 | Resistor_SMD:R_0805_2012Metric | R13 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U13 |
| 1 | CP2102N-A02-GQFN20 | Package_DFN_QFN:SiliconLabs_QFN-20-1EP_3x3mm_P0.5mm_EP1.8x1.8mm | U41 |
| 1 | ESP32-S3-WROOM-1U-N16R8 | 1_tme:ESP32S3WROOM1UN16R8 | IC1 |
| 1 | Green | 1_tme:LEDC2012X120N | D5 |
| 1 | MAX3485 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U42 |
| 1 | USB4145-03-0230-C | 1_tme:USB4145030230C | J25 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U39 |
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Questions
How big is the Ekspander 100x i2c PCB?
It measures 500 × 108.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Ekspander 100x i2c use?
288 parts, built around the ESP32-S3-WROOM-1U-N16R8, MAX3485ED, AP63203WU and CP2102N-A02-GQFN20. 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 Ekspander 100x i2c KiCad files?
From the kanaboid/elektronika repository on GitHub, at the commit this page was made from: the board is pcb/ekspander_100x_i2c/ekspander_100x_i2c.kicad_pcb and its schematic mainboard/M8SBC-486/pcb/avr.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ekspander 100x i2c design in my own project?
Its repository states no licence, so its author keeps all rights: ask kanaboid before reusing the design.