BoardB UI
About the BoardB UI PCB
BoardB UI is an open source PCB design by Chrissyuh, published on GitHub under the MIT license. It is a 2-layer board measuring 64 × 38 mm, with 13 components from 13 distinct parts.
By type, the board carries 5 resistors, 3 capacitors, 2 connectors, 2 diodes and 1 switch.
From the project
ESP32-S3 KiCad hardware and bring-up firmware for a self-watering flower pot prototype
Board B connects to Board A J6 through J1 with the same pin order:
1. +3V3 2. GND 3. SDA 4. SCL 5. ENCA 6. ENCB 7. ENCSW 8. ERRORLED 9. STATUSLED`
The OLED header target is the common 4-pin SSD1306 I2C module order GND, VCC/3V3, SCL, SDA. Verify the actual module pin order before fabrication.
The PCB outline is 64 mm x 38 mm with M2.5 non-plated mounting holes. The front side is the user-facing panel with the OLED header/module outline, EC11 encoder footprint, error/status LEDs, and labels. The 9-pin JST-XH cable connector and the support R/C parts are on the back side.
BoardB UI bill of materials (BOM)
13 components, 13 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | UI cable to Board A J6 | JST_XH_S9B-XH-A_1x09_P2.50mm_Horizontal | J1 |
| 1 | OLED SSD1306 I2C | PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | EC11 encoder + push | RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | ERROR red | LED_0805_2012Metric | D1 |
| 1 | STATUS green/blue | LED_0805_2012Metric | D2 |
| 1 | 100nF ENC_A debounce DNP | C_0805_2012Metric | C1 |
| 1 | 100nF ENC_B debounce DNP | C_0805_2012Metric | C2 |
| 1 | 100nF ENC_SW debounce DNP | C_0805_2012Metric | C3 |
| 1 | 10k ENC_A pullup | R_0805_2012Metric | R1 |
| 1 | 10k ENC_B pullup | R_0805_2012Metric | R2 |
| 1 | 10k ENC_SW pullup | R_0805_2012Metric | R3 |
| 1 | 330R error LED | R_0805_2012Metric | R4 |
| 1 | 330R status LED | R_0805_2012Metric | R5 |
BoardB UI design files
The KiCad project lives in the Chrissyuh/SmartWateringFlowerPot repository on GitHub; these links point at the commit this page was built from.
BoardB UI: common questions
How big is the BoardB UI PCB?
The BoardB UI measures 64 × 38 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BoardB UI?
13 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the BoardB UI design files?
From the Chrissyuh/SmartWateringFlowerPot repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the BoardB UI design in my own project?
Yes, under the terms of its MIT license, which Chrissyuh chose for the repository.
