Numeric keypad_Self-holding version

264

02:23:23

Numeric keypad using relays.
(Self-holding version)
(Displays numbers from 0 to 9)

789
456
123
0

It consists of a numeric keypad at the top left, a simultaneous press countermeasure circuit at the top, an encoder at the bottom right, a 7-segment decoder at the bottom center, and a 7-segment display at the bottom left.
It can be used as an input circuit for calculators, etc.

published 2 years ago

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