Falsh_01 Posted March 18, 2005 Report Share Posted March 18, 2005 How do I make a device that can control a light to turn on and off at a certain time of the day? Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 18, 2005 Report Share Posted March 18, 2005 Hi Falsh,Welcome to our forum.I would just take a cheap LED alarm clock and replace its beeper with a small audio isolation transformer. Then I would rectify and filter the beeping pulses into a DC voltage that I would feed to a Triac that switches the electrical outlet for the lamp to the mains.Since alarm clocks continue beeping for about one and a half hours, I would need to dig into the clock's circuitry to shut it off sooner.Wiring things like this to the mains requires safety and insulation skills. ;D Quote Link to comment Share on other sites More sharing options...
MP Posted March 19, 2005 Report Share Posted March 19, 2005 The main thing, and what audioguru has pointed out, is that you will need a clock of some sort. You can look for a clock circuit or use a microcontroller if you are familiar with them. Once you have the clock circuit or a 24 hour timer, you just have to count pulses to turn on or off a relay.I have posted a circuit which might be a start for you. You will want to modify it to give you all of the features needed.MP Quote Link to comment Share on other sites More sharing options...
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