I'm looking to make a TV timer for the kids.. yes, my kids put the TV on then just walk away.. drives me mad! .. so this way they will need to press a button every X period of time, probably 15 minutes.
I want to keep it as cheap and simple(and safe) as I can.. take a look at the diagram.. what is the simplest and chepest way to take 240VAC down to a usable 5Vdc for 555 timers, PICAXE chip etc.. without needing a transformer and the big guns ..???
I was thinking, Diode Bridge, some resistors, voltage Reg like LM317(?) etc.. few Caps.. not much more
appreciate all thoughts/input! .. current is so low.. so thinking/hoping I should be able to not need a transformer.
I want to keep it as cheap and simple(and safe) as I can.. take a look at the diagram.. what is the simplest and chepest way to take 240VAC down to a usable 5Vdc for 555 timers, PICAXE chip etc.. without needing a transformer and the big guns ..???
I was thinking, Diode Bridge, some resistors, voltage Reg like LM317(?) etc.. few Caps.. not much more
appreciate all thoughts/input! .. current is so low.. so thinking/hoping I should be able to not need a transformer.
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