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Topic: How to switch A.C. load without relay with arduino..?? (Read 1 time) previous topic - next topic

Joy

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..??

Grumpy_Mike

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.

cjdelphi

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?

dc42

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.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Joy

#4
Nov 15, 2012, 11:28 am Last Edit: Nov 15, 2012, 11:56 am by Joy Reason: 1

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..

dc42

Opto triacs should be OK for switching lights and fans, assuming a 230V mains and no more than 200W of lighting per circuit.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Joy


Another thing is that please tell me some SSR which are common and are mostly available.. load will be 500W maximum

dc42

Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

terryking228

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...
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

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