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  • may sam commented on DIY Hacks and How Tos's instructable Laser Tripwire Alarm9 months ago
    Laser Tripwire Alarm

    yes, it's rightbut i haven't this problem because i conected my laser pack to a remote annunciator, and that remote annunciator with an small puls can start the sound and also continue it to several second,anyway thank you so much for your guide and suggestion.

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