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pcb-2 reference design (keyboards) | Open App Note
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@rek
keyboards
keyboards
rek
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Components (4)
Reference
Value
Description
U1
Arduino_Pro_Micro
Arduino Nano
U2
TRRS
D1-D21
Diode
1N4148 (DO-35) or 1N4148W (SOD-123)
S1-S21
Keyswitch
Push button switch, normally open, two pins, 45° tilted
keyboards schematic
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keyboards board