AGFX ST7735 shield - Spirik/GEM GitHub Wiki
AGFX/ST7735 shield carries pins to connect ST7735 based (or compatible) display and pins for selection of required voltage and backlight connection.
Board
Components
| Place | Component | Links/Notes |
|---|---|---|
| R1-R3 | 1K resistor, SMD 1206 | Optional resistors (if required by display, otherwise these connections can be bridged) |
| RST | Push-button (momentary switch), 6x6mm | Board reset, Ali, Amazon |
| J1 | Male or female pin headers, 1x8 | Headers to connect to display |
| J2 | Male pin headers, 1x3 | Headers to set voltage for display |
| J3 | Male pin headers, 1x3 | Headers to set backlight connection |
| - | Jumper caps | Caps to short headers J2 and J3, Ali |
| - | Arduino stackable headers | To stack on top of other shields |
Operation
Select voltage, required by the display, by shorting J2 header with jumper cap (for either 5V or 3.3V supply). Select backlight connection by shorting J3 header with jumper cap (for either VCC or GND connection; may also work if not connected depending on the display module; custom voltage value can be supplied to BL header directly if required). Сonnect ST7735 based (or compatible) display to headers J1 according to silkscreen markings.
Note that R1-R3 resistors may not be required by every display module (or another value should be used), so it is advised to check applicable configuration on breadboard beforehand. If not required, these pads can be bridged by piece of wire or solder blob (or resistor with minimal value).
Examples
AGFX/ST7735 shield can be used to replicate the following test benches:
Files
- Autodesk Fusion .f3z - project, containing schematic and board views
- Gerber files .zip - ZIP-archive of Gerber files (including .xln file for drilling)
- Schematic .pdf - PDF with schematic exported from Fusion project
- SVGs .zip - ZIP-archive of SVG files that can be used for DIY fabrication of boards (including board outline, top and bottom copper layers, silkscreen layer)