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Author Topic: How to switch A.C. load without relay with arduino..??  (Read 1494 times)
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I am making a push button switch board for switching ON or OFF A.C. load.

Please tell which way it be reliable, using RELAYS, TRAICS or SCR...??
Personally I do not want to use relays, so if I use a TRIAC, then how should I connect it to arduino .
Can I connect the GATE of the TRIAC directly to arduino ar I should use a MOC3011 optoisolator..??
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Use an SSR as that is a triac with built in opto isolator and zero crossing detector.

Otherwise use a triac with either a built in opto isolator on the gate or a seprate one. With an SCR you only get half the power.
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depends on how much you want to use it (switching on/off)

if it's a lot of switching on and off. avoid relays... a solid state relay would be a good alternative for a lot of switching...

out of curiosity, what is you're doing?
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For switching light loads, you can use an opto triac such as http://www.farnell.com/datasheets/1244301.pdf. For higher loads, use an SSR - it's easier than making one yourself from a triac.
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depends on how much you want to use it (switching on/off)

if it's a lot of switching on and off. avoid relays... a solid state relay would be a good alternative for a lot of switching...

out of curiosity, what is you're doing?

I am converting my bedroom electrical switch board to digital. That is , instead of the piano switch I will be using tactile push buttons to switch LIGHTS, FAN and etc. Later in few days I will add a IR sensor and a remote to control them with an IR remote..
« Last Edit: November 15, 2012, 05:56:06 am by Joy » Logged

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Opto triacs should be OK for switching lights and fans, assuming a 230V mains and no more than 200W of lighting per circuit.
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Another thing is that please tell me some SSR which are common and are mostly available.. load will be 500W maximum
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Assuming about 230VAC mains, 500W is a little over 2A. This one http://uk.farnell.com/sharp/s201s06f/relay-solid-state/dp/1618473 looks the most economical. See also http://in.element14.com/jsp/search/browse.jsp?N=204034+110138169+110170154&Ns=P_PRICE_FARNELL_IN%7C0&locale=en_IN&appliedparametrics=true&getResults=true&suppressRedirect=true&isRedirect=&originalQueryURL=/jsp/search/browse.jsp%3FN%3D204034%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_IN%26divisionLocale%3Den_IN%26catalogId%3D%26skipManufacturer%3Dfalse%26skipParametricAttributeId%3D%26prevNValues%3D204034 for supplies in India.
« Last Edit: November 15, 2012, 06:37:56 am by dc42 » Logged

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Quote
please tell me some SSR which are common and are mostly available

The block-type SSR is easy to use and widely available.

You can control it directly from an Arduino pin.
It has optical isolation built-in
It can control lots of power

Examples: http://goo.gl/oe6a0


DISCLAIMER: Mentioned stuff from my own shop...
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