I have brew kettle with 2 kW heating element. After achieving desired temperature I need to reduce power of heating element.
I suppose that is possible manually with SCR voltage regulator like this one:
http://www.ebay.com/itm/2000W-220V-AC-SCR-Electric-Voltage-Regulator-Motor-Speed-Control-Controller-/331071115259?pt=LH_DefaultDomain_0&hash=item4d15604ffb
Next idea is that in future I replace potentiometer with optocoupler, maybe something like this: 4N35 optocoupler http://www.ebay.com/itm/4N35-10-pcs-Phototransistor-Optocoupler-Optoisolator-30V-60mA-100mA-max-USA-/181637331541?pt=LH_DefaultDomain_0&hash=item2a4a6dba55
Inputs for optcoupler would be controlled via Arduino, and hopefully I can make 0-5V pwm exit from Arduino to drive optocoupler, and change resistance in place of removed potentiometer? Is this good idea?
Is there any other component which can regulate 220V AC power for heating element?
I have found some proportional SSR's but they are quite more expensive, and they need more space and demand cooling which is hard to fit into my existing box. Any other idea?
I suppose that is possible manually with SCR voltage regulator like this one:
http://www.ebay.com/itm/2000W-220V-AC-SCR-Electric-Voltage-Regulator-Motor-Speed-Control-Controller-/331071115259?pt=LH_DefaultDomain_0&hash=item4d15604ffb
Next idea is that in future I replace potentiometer with optocoupler, maybe something like this: 4N35 optocoupler http://www.ebay.com/itm/4N35-10-pcs-Phototransistor-Optocoupler-Optoisolator-30V-60mA-100mA-max-USA-/181637331541?pt=LH_DefaultDomain_0&hash=item2a4a6dba55
Inputs for optcoupler would be controlled via Arduino, and hopefully I can make 0-5V pwm exit from Arduino to drive optocoupler, and change resistance in place of removed potentiometer? Is this good idea?
Is there any other component which can regulate 220V AC power for heating element?
I have found some proportional SSR's but they are quite more expensive, and they need more space and demand cooling which is hard to fit into my existing box. Any other idea?