Hey Grandad, can you make a Door Alarm?
2,844 views · Published 15 June 2014 · 8:55 · Indexed 30 October 2026
Channel: GrandadIsAnOldMan · 2014 · Science & Technology
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=PLA5a2xPRSrB00lxaX8BD46F1QDJTe7Em4 My Channel page https://www.youtube.com/c/GrandadIsAnOldMan Oldest videos https://www.youtube.com/c/GrandadIsAnOldMan/videos?flow=grid&view=0&sort=da Most Popular https://www.youtube.com/c/GrandadIsAnOldMan/videos?sort=p&flow=grid&view=0 Newest videos https://www.youtube.com/c/GrandadIsAnOldMan/videos?sort=dd&view=0&flow=grid Playlists https://www.youtube.com/c/GrandadIsAnOldMan/playlists?flow=grid&view=1 Facebook https://www.facebook.com/grandadisanoldman/ Merchandise - Check both of these links if you are interested as the prices will vary and the shipping charges will be different. http://www.redbubble.com/people/grandadiaom/portfolio http://grandadisanoldman.cottoncart.com/ I have thousands of videos on YouTube, to find one try my search guides https://youtu.be/ceBSOoOHcgw or https://youtu.be/Zj4UgwkwYRk My "GrandadsOtherChannel" channel is generally where I will host the videos that give extra detail or longer versions of the videos I post on my main channel https://www.youtube.com/c/GrandadsOtherChannel
