> NOTE: If you know other cheap designs of DIY Air Raid Siren easy to build, PLEASE, post links to instructions under this comment.
JFTR, I'm Ukrainian living in Ukraine. Here is my statement for HN:[0]
+ Verified Ways to Help Ukraine - https://euromaidanpress.com/2022/02/27/verified-ways-to-help...
+ My Patreon - https://patreon.com/app4soft
[0] https://news.ycombinator.com/item?id=30395897
> NOTE: If you know other cheap designs of DIY Air Raid Siren easy to build, PLEASE, post links to instructions under this comment.
JFTR, I'm Ukrainian living in Ukraine. Here is my statement for HN:[0]
+ Verified Ways to Help Ukraine - https://euromaidanpress.com/2022/02/27/verified-ways-to-help...
+ My Patreon - https://patreon.com/app4soft
[0] https://news.ycombinator.com/item?id=30395897