Alarm clock attached to wall bed. - Page 1
Forum section: electronics / general

author: redkite
author_rank: Newbie
timestamp: April 10, 2015, 12:55:21 am
content: That's basically the idea but I know nothing about electronics.I'd like to have to fold the bed away to turn off the alarm. Folding down the bed between certain hours would set the alarm off.I'd put the alarm in a difficult to access box with several locks or something.Is this project crazy?Thanks in advance

author: kolonelkadat
author_rank: Regular Contributor
timestamp: April 10, 2015, 01:15:14 am
content: this sounds like a job for anOptoInterrupterhttp://lmgtfy.com/?q=optointerrupteri'll leave implementation details up to you

author: Ryano
author_rank: Regular Contributor
timestamp: April 10, 2015, 01:27:17 am
content: Not crazy at all. Although having my bed dictate my sleeping patterns might dive me crazy!You will also want a microcontroller of some kind, and a real time clock, if you don't want this contraption driving you crazy during the weekend.

author: Tuppe
author_rank: Contributor
timestamp: April 10, 2015, 04:37:17 pm
content: For a complete beginner, I'd recommend hooking up a regular limit switch on your alarm clock disable button.You didn't tell us how your alarm clock operates. If it has disable button, it will be a simple job to create bypass switch for it. If it's mechanical switch, it might be a bit trickier.Google search, "micro limit switch". You can possibly find these from all sorts of devices.I wouldn't recommend a complete beginner to MCUs and optocouplers, before even knowing how simple electric circuits operate.I like the idea though, good way to avoid snoozing for 2 hours

author: redkite
author_rank: Newbie
timestamp: April 11, 2015, 12:40:16 pm
content: It seems I might have to pop down the the local university and find an electronics student if I want to get this made properly but I have an idea for a workaround just to test the idea.A plugin timer connected to a buzzer with a contact switch on some kind of hinge that disconnects the circuit as the bed is folded away. Good old gravity.What do people think?

author: Ian.M
author_rank: Super Contributor
timestamp: April 11, 2015, 01:01:48 pm
content: You are over-thinking this. Simply velcro a small battery powered alarm clock to the underside of the bed at the head end, in the middle so you cannot easily reach it until the bed is stowed away.

author: redkite
author_rank: Newbie
timestamp: April 16, 2015, 01:21:19 am
content: With an alarm clock I could just fold the bed back down and get back in. I'm trying to make it more difficult to go back to bed than to stay up.Is it possible to combine a plug in timer, a tilt switch and a buzzer?I'd also need a mains to 12v adapter to plug into the timer.Obviously I can put cases around everything to stop easy access.

author: redkite
author_rank: Newbie
timestamp: May 20, 2015, 02:47:04 pm
content: It seems to me that I can use a 12v programmable timer with a 12v rechargeable battery and run a 12v buzzer and a tilt switch.http://www.amazon.co.uk/Digital-Power-Programmable-Timer-Switch/dp/B008999RYYI'd like to buy something like this in a shop to save the wait and because i like to use shops so they're still there. Maplins doesn't appear to have anything.