Arduino Uno Debouncing

More sophisticated debouncing can be performed by a cheap Arduino Uno processor.

Normally the analog debounce circuits perform well, but it is an easy to build project and it provides a side tone generator at the same time.

Only the key down slope is debounced!

Advantage is that debouncing doesn’t lengthen the dot/dash at the end.

It uses BS170 transistors for keying a transceiver.

Instead of the potentiometer two equal resistors can be used to dividing the power supply voltage.

The switch is only needed if you want to be able to switch off debouncing.

The side tone filtering is optional.

The side tone has to go directly to a PC speaker. Latency is too high on the computer.

If using PCW fistcheck, the side tone has to be supplied to the computer also.

Last update: October 8, 2024