Duet 3 6HC Piezo Buzzer

[Diamondback]

Hey,

ever since I switched from my trusty PanelDue to an android tablet that displays DWC, I'm really missing the buzzer for alerting me to certain things. I know that DWC is supposed to play a sound as well when using M300, however for various reasons, this not really a useful solution for me.

I'd really like to have that buzzer back, so I'm wondering if I can somehow add a hardware buzzer that ideally would also be controlled by M300. If I need to control it some other way, that's fine as well though.

Any buzzer will be better than not having one.

[dc42]

@Diamondback one option would be to connect a piezo buzzer to an IO_OUT port or to the Laser/VFD port and control it with M42 and G4.

[Diamondback]

@dc42 What kind of hardware would I be looking at?
Would it also be possible to use the second gcode stream to make the G4 non blocking to other things?

[dc42]

@Diamondback yes you could use the second GCode stream. Alternatively, use daemon.g because G4 calls are only blocking to the motion system if a motion command has been executed by the same input channel since the most recent G4 or other blocking command. You could also use a trigger to execute it, but bear in mind that only one trigger can execute at a time except for the emergency stop trigger.

For the hardware, any 2-wire piezo sounder without integrated driver electronics should work. Here are some examples:

https://www.ebay.co.uk/itm/382419033797
https://uk.rs-online.com/web/c/passive-components/sounder-buzzer-microphone-components/piezo-buzzers/?searchTerm=piezo+sounder&pn=1&sortBy=P_breakPrice1&sortType=ASC&applied-dimensions=4294462596,4294817747.

[Diamondback]

@dc42 perfect, thanks