TM1638 LED&KEY with I2C for fischertechnik

prusaprinters

<p>These <a href="https://handsontec.com/index.php/product/tm1638-7-segment-display-keypadled-module/">cheap LED&amp;KEY modules</a> are all over ebay and aliexpress.</p><p>The <a href="https://duckduckgo.com/?q=TM1638+datasheet">TM1638 chip</a> uses a non-bus serial protocol. I made them into an I2C target (slave) device by adding an ATtiny85 which runs my <a href="https://github.com/ftjuh/I2Cwrapper">I2Cwrapper firmware</a> with the TM1638liteI2C module enabled. It can be addressed from the controller (master) using the <a href="https://github.com/ftjuh/I2Cwrapper/blob/main/src/TM1638liteI2C.h">TM1638liteI2C.h library</a> and these pin assignments: const uint8_t strobePin = 1; const uint8_t clockPin = 4; const uint8_t dataPin = 3;.</p><p>You can use <a href="https://www.thingiverse.com/thing:5532026">this adapter</a> to flash or update the ATtiny85 firmware.</p><p>The case is meant for fischertechnik models, the six pin connector is compatible with other fischertechnik I2C hardware.</p><p>Print the top part with support<em>only touching buildplate</em>, you don't want to have support under the button levers.</p><p>[seo: fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik fischertechnik]</p>Category: Robotics