Trackball lt7dk
About the Trackball lt7dk PCB
Trackball lt7dk is an open source PCB design by lambdakb, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 62 × 84 mm, with 27 components from 16 distinct parts.
Other key parts include the ProMicro_RP2040, TPS76318 and PMW3360DM-T2QU. By type, the board carries 9 switches, 6 connectors, 5 capacitors, 3 ICs, 2 resistors and 1 LED.
From the project
LT7DK PMW3360 Trackball Development Kit
[PCB Front]: output/img/lt7dk-pcb-top.svg [PCB Front PNG]: output/img/lt7dk-pcb-top.png [PCB Back]: output/img/lt7dk-pcb-bottom.svg [PCB Back PNG]: output/img/lt7dk-pcb-bottom.png
The PCB has been designed in KiCad EDA 9.0 using the kicad-lkbd libraries.
You can preview the project files using KiCanvas directly in your browser and download the latest fabrication files for JLCPCB from the latest release.
Main components on the Trackball lt7dk
Trackball lt7dk bill of materials (BOM)
27 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ProMicro_RP2040 | MCU_KB2040_DIP-24_Socket_Reverse | U1 |
| 1 | TPS76318 | SOT-23-5 | U2 |
| 1 | PMW3360DM-T2QU | PMW3360DM-T2QU | U3 |
| 1 | PINHD_1x8_Male | PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | Conn_01x02 | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 4 | PINHD_1x2_Male | PinHeader_1x02_P2.54mm_Vertical | J3, J4, J5, J6 |
| 7 | SW_Push | SW_D2FC_OMR | SW1, SW2, SW3, SW4, SW5, SW6, SW7 |
| 1 | SW_Push | SW_Push_1P1T_6x3.5mm | SW8 |
| 1 | C221841 SW_SPST | SW_SPDT_PCM12 | SW9 |
| 1 | OLED_I2C_SSD1306 | OLED_SSD1306_128x32_0.91inch_I2C_btmSilk | OL1 |
| 1 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1 |
| 1 | 1UF 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 2 | 4.7UF 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3 |
| 2 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 39R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
Trackball lt7dk design files
The KiCad project lives in the lambdakb/trackball-lt7dk repository on GitHub; these links point at the commit this page was built from.
Trackball lt7dk: common questions
How big is the Trackball lt7dk PCB?
The Trackball lt7dk measures 62 × 84 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Trackball lt7dk?
27 components, from 16 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 lt7dk design files?
From the lambdakb/trackball-lt7dk 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 lt7dk design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which lambdakb chose for the repository.