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Topic: 24ac signal (Read 1 time) previous topic - next topic

sonnyyu

#5
Mar 22, 2013, 03:36 pm Last Edit: Mar 22, 2013, 05:56 pm by sonnyyu Reason: 1
Quote
You could probably eliminate three of the diodes because half-way rectification would be adequate in this case.

Yes we could, all we need add one electronic capacitor at output half-way rectification.

or use this



since we face 24V instead of 110V, cap could be droped.

second one use Optocoupler with AC Input.



dgerman

Would something as simple as a single diode (makes 1/2 wave DC), a 10uf cap(turns it into lumpy DC) and a 78L05 regulator provides protection and makes very nice DC be appropriate ? (looking to minimal component and cost) Does this approach provide isolation?

sonnyyu

#7
Mar 22, 2013, 04:06 pm Last Edit: Mar 22, 2013, 04:09 pm by sonnyyu Reason: 1
I might be wrong about the half-rectification too.

Since u have one electronic capacitor connect with Arduino input. electronic capacitor at output half-way rectification might not necessary.

sonnyyu


Would something as simple as a single diode (makes 1/2 wave DC), a 10uf cap(turns it into lumpy DC) and a 78L05 regulator provides protection and makes very nice DC be appropriate ? (looking to minimal component and cost) Does this approach provide isolation?


No

Bradshaw106

Thanks for all the responses!  I was thinking of rectifying it, just wasn't sure what to do beyond that.
I will definitely play with that circuit

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