Trackball
About the Trackball PCB
Trackball is an open source ESP32 PCB design by mornepousse, published on GitHub. It is a 2-layer board measuring 52 × 72.1 mm, with 51 components from 30 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the TCR2EF19, PMW3360, TLV73333PDBV, TP4056 and DW01. By type, the board carries 15 resistors, 12 capacitors, 8 ICs, 6 switches, 5 connectors and 2 transistors.
From the project
Proof of concept for my Custom esp32-s3 mouse.
Main components on the Trackball
Trackball bill of materials (BOM)
51 components, 30 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TCR2EF19 | SOT-23-5 | U1 |
| 1 | PMW3360 | PMW3360 | U2 |
| 1 | TLV73333PDBV | SOT-23-5 | U3 |
| 1 | ESP32-S3-WROOM-1 | ESP32-S3-WROOM-1 | U4 |
| 1 | TP4056 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U5 |
| 1 | DW01 | SOT-23-6_Handsoldering | U6 |
| 1 | FS8205A | SOT-23-6_Handsoldering | U7 |
| 1 | NRF24L01_Breakout | nRF24L01_Breakout | U8 |
| 2 | BSS83P | SOT-23 | Q2, Q3 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Conn_02x03_Odd_Even | Harwin_Gecko-G125-FVX0605L0X_2x03_P1.25mm_Vertical | J3 |
| 1 | Conn_01x06_Pin | PinHeader_1x06_P2.00mm_Vertical | J4 |
| 2 | Conn_01x01_Female | PinSocket_1x01_P2.54mm_Vertical | J7, J10 |
| 1 | SSD1306 | PinHeader_1x04_P2.54mm_Vertical | Brd1 |
| 2 | Push_Button | SW_Hotswap_Kailh_Choc_V1V2_1.00u | SW1, SW2 |
| 1 | RotaryEncoder | Alps-EC10E1220501 | SW3 |
| 3 | Push_Button | SW_Micro_Switch | SW4, SW5, SW6 |
| 2 | LED_3mm | LED_D3.0mm | D101, D102 |
| 5 | 0.1U 0.1u | C_0805_2012Metric | C1, C5, C6, C7, C9 |
| 3 | 1u | C_0805_2012Metric | C2, C3, C4 |
Show 10 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10UF 10uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 2 | 0.1u | C_0805_2012Metric | C10, C11 |
| 1 | 4.7U 4.7u | C_0805_2012Metric | C104 |
| 4 | 10K 10k | R_0805_2012Metric | R1, R2, R5, R102 |
| 3 | 1k | R_0805_2012Metric | R3, R4, R6 |
| 1 | C17888 0R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R7 |
| 1 | 100 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 39 | R_0805_2012Metric | R101 |
| 2 | R_1206 | R_0805_2012Metric | R105, R106 |
| 3 | ? | R_0805_2012Metric | R107, R108, R109 |
Trackball design files
The KiCad project lives in the mornepousse/Mase repository on GitHub; these links point at the commit this page was built from.
Trackball: common questions
What microcontroller does the Trackball use?
The Trackball is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the Trackball PCB?
The Trackball measures 52 × 72.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Trackball?
51 components, from 30 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 Trackball design files?
From the mornepousse/Mase 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 Trackball design in my own project?
The repository has no license, so all rights stay with mornepousse. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Trackball without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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