TM1638 LED&KEY with I2C for fischertechnik
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Adds an I2C interface and fischertechnik connectors to cheap LED&KEY modules.
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Model information
- Source
- Printables
- Category
- RC & Robotics
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
These cheap LED&KEY modules are all over ebay and aliexpress.
The TM1638 chip uses a non-bus serial protocol. I made them into an I2C target (slave) device by adding an ATtiny85 which runs my I2Cwrapper firmware with the TM1638liteI2C module enabled. It can be addressed from the controller (master) using the TM1638liteI2C.h library and these pin assignments: const uint8_t strobePin = 1; const uint8_t clockPin = 4; const uint8_t dataPin = 3;.
You can use this adapter to flash or update the ATtiny85 firmware.
The case is meant for fischertechnik models, the six pin connector is compatible with other fischertechnik I2C hardware.
Print the top part with supportonly touching buildplate, you don't want to have support under the button levers.
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Category: Robotics