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This module is composed of 20 B11 Metec Braille cells driven by piezo ... (eg 20 buttons for this module). The module also needs a DC/DC converter (5V to 200V) . ├── src # library source ├── include # ...
ATmega328p micro-controller as per schematic or alternatively a Arduino uno/nano module. Resistors: 20 ohms , 220 ohms, 660 ohms, 10K , 500ohms X 7, 1K X 4 Transistors 4 X 2N2222 NPN One 4 digit seven ...
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