Hey Grandad, can you make a Door Alarm?


Madhav Mahajan asked "Please make door alarm" and "Electric door lock ". I haven't got around to the door lock yet, but here is the alarm. To be honest it would be cheaper to buy one as I can get a twin pack in the bargain store for £1 which is less than it cost me to put the parts together for this circuit.

I did a quick Google search for suitable circuits and combined 2 that I found to get the result I was looking for. I have just found this YouTube video that gives some useful and very clear guidance on the 555 timer for making sounds with a very similar circuit. https://youtu.be/OUwGC35vX50

I will add my video to my Electronic projects playlist
https://www.youtube.com/playlist?list...

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I have over 1800 videos on YouTube covering a wide range of subjects. To find them follow my YouTube search guide https://youtu.be/ceBSOoOHcgw or see my playlists
https://www.youtube.com/user/GrandadI...
Generally my projects are for my grandchildren to enjoy. OK, I enjoy them too. If anybody else likes them, that is a bonus. I like to keep my work as simple and basic as possible so that it can be copied easily and improved by anybody who wants to try themselves. I recycle or repurpose items rather than buy new and when I do buy I like to keep it cheap.
https://www.youtube.com/user/GrandadI...

Tags : grandad, can, you, make, door, alarm,

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