Simplex 2001 / 2120 voice evacuation tone generator!
Nick's Mad Science!
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Simplex 2001 / 2120 voice evacuation tone generator!
10 050 просмотров · 12 л. назад
Nick's Mad Science!
2,34 тыс. подписчиков
10 050 просмотров · 12 л. назад
This is where the 4003 and 4100 tones come from.
http://nickpiegari.com/misc/firealarm...
Thanks wileyk209zback and Alex H. for letting me use the excerpt from your video!
