This board allows you to use the TFT header on SKR Mini E3 boards (V1.2, V2.0, and V3) as 2 more thermistor inputs. This is helpfull if you want to use the EXP1 and SPI header for a display.
| Thermistor | Board Pin Name | MCU Pin Name |
|---|---|---|
| T0 | TX2 | PA2 |
| T1 | RX2 | PA3 |
Both thermistors use a 4.7K pullup (Klipper's default pullup value) as well.
For Klipper configuration, reference the Klipper Configuraton Reference and define a [temperature_sensor xxxx] section with the correct sensor type with the pin value from above.
Plug the board into the TFT header with the overhang towards the center of the board (Blue box below) and install a jumper wire between the single pin on the expansion board and the 3.3V pin of the SWD header on the control board (purple circle).
| Reference | Name | Note |
|---|---|---|
| R1, R2 | 4.7K Resistor | 0805 SMD resistor, 1% |
| C1, C2 | 4.7uF Capacitor | 0805 SMD capacitor, MLCC |
| T0, T1 | Thermistor Connector | 2-pin JST HX, B2B-XH |
| J1 | Mainboard Connector | 5-pin Dupont Female, 2.54mm |
| J2 | 3v3 Connector | 1-pin Dupont Male, 2.54mm |
- Rev A
- Initial Release
- Rev B
- Rework of silkscreen and layout for easier assembly. Added link to back of board.