On 27/01/2021 05:48, Rod Speed wrote:

The other obvious possibility is to modify the sounder so its much louder

If the sounder is just a speaker then perhaps just soldering a high
impedance piezo horn across the speaker may work.


https://tinyurl.com/y69mql6a


https://www.ebay.co.uk/itm/p-150W-Pi...AOSwLiBeHzB Q


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