Semi-Smart Remix ST7796S added alternative wiring.
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Semi-Smart Remix - alternative wiring ST7796, Wifi manager
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Updated at source:
Model information
- Source
- Printables
- Category
- Prusa Parts & Upgrades
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- Creative Commons — Attribution — Noncommercial — Share Alike
HW modifications:
Cut-off 5V traces
1) first between the temp sensor connector and the LED connector on the main board
and solder 3.3V wire
2) Cut-off 5V trace (just under yellow wire) and replace it with 3.3V wire on the HMI board
In this state, it is still usable with Arduino & R4 and safe with Arduino Nano ESP32
Optional alternative wiring for the ST7796 display on unused pins for use with Arduino Nano ESP32 only:
(On ESP32 SW side, utilize fast enough GPIO Mux, not slow bit-bang SPI)
All original peripherals stay untouched.
Why that? Servo will be useful in the future. I like the "cold dehydrator" idea about the FilaDC i10...
