4 layers81.2 × 96.6 mm
2 layers31 × 48 mm
ST77xx
TheEvilRoot/ST77xxReverse engineered schematics of ST77xx(35/89) breakout board
- Size
- 31 × 48 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 12
- Pads
- 40
- Tracks, vias
- 69, 11
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 Dec 2024
- Updated
- 24 Mar 2025
Overview
ST77xx is an open-source printed circuit board by TheEvilRoot, from the TheEvilRoot/ST77xx repository on GitHub. It is a 2-layer board of 31 × 48 mm with 11 parts on 12 nets, routed with 69 tracks and 11 vias.
It is built around the SS8050. Its parts include 4 resistors, 3 capacitors, 1 IC, 1 transistor and 1 connector. It belongs with the interfaces and adapters and microcontroller boards boards of this library.
Main components
1README
README.mdST77xx
Reverse engineering of ST7735/ST7789 breakout board for SPI TFT display.
J1 (Pins) is breakout connector.
DS1 is display flex connector (0.7mm pitch, 0.4x3mm pads)
Regulator is for 5V compatibility and could be omitted on 3.3V boards.
Connector symbols and footprints are available in library in repository
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 50k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C2, C3 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 2k2 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | Pins | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | SS8050 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ST77xx_FPC_12pin | ST77xx_FPC:ST77XX_FPC_12pin_0.8mm_Solder | DS1 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U1 |
Questions
How big is the ST77xx PCB?
It measures 31 × 48 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ST77xx use?
11 parts, built around the SS8050. 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 ST77xx KiCad files?
From the TheEvilRoot/ST77xx repository on GitHub, at the commit this page was made from: the board is st77xx.kicad_pcb and its schematic st77xx.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ST77xx design in my own project?
Its repository states no licence, so its author keeps all rights: ask TheEvilRoot before reusing the design.
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