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[Playing the bug]     [Debounce circuit]     [Arduino Uno Debouncing]

A cheap debounce circuit for the bug:

Only junkbox transistors are used.

R4 and C2 set the debounce behavior. 0.7×R4×C2 has to be larger than the longest “open” bounce. Q4 and Q5 act as a comparator.

Power supply voltage is +5V and is limited by the maximum Vbe voltage allowed

Number of inputs and outputs is optional. The BS170 at the output is suitable for most transceivers.

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Last update: February 23, 2023

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