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'[EE] Heater control'
2002\08\10@134812 by 9-2?B?QnJhbmtvIEthcmFrbGFqaeY=?=

Hello,

     I need a simple SCR or TRIAC based heater power control. I have
heater of 2kW(220V~) and I want to deliver only 0 to 500W to it.

anyone have a idea or link or anything that can help me? I think about
optocupler with zero cross unit but I need help about that?

thanx in advance

--
sincerely,
Branko
spam_OUTbranekTakeThisOuTspameunet.yu
http://solair.eunet.yu/~branek
ICQ: 15616778

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2002\08\10@184235 by Jinx

face picon face
> I need a simple SCR or TRIAC based heater power control. I have
> heater of 2kW(220V~) and I want to deliver only 0 to 500W to it.
>
> anyone have a idea or link or anything that can help me? I think
> about optocupler with zero cross unit but I need help about that?

A couple of circuits here that should help

http://home.clear.net.nz/pages/joecolquitt/txless.html

For a heater you can count zero crossings and switch the element
on/off for whole cycles (not suitable for lights, too flashy). The closer
to the z-c point you turn the element's power on/off the less chance
of creating EMI. For setting the power output, may I suggest

http://home.clear.net.nz/pages/joecolquitt/0pots.html

or perhaps use an IR system built around ideas on the first page or
DIP switches. The light chaser here

http://home.clear.net.nz/pages/joecolquitt/0chaser.html

uses a rotary panel switch diode-ANDed to make a 4-bit BCD
encoder

Take your pick

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2002\08\10@192057 by 9-2?B?QnJhbmtvIEthcmFrbGFqaeY=?=

Hello Jinx,

Sunday, August 11, 2002, 12:42:19 AM, ste napisali:

>> I need a simple SCR or TRIAC based heater power control. I have
>> heater of 2kW(220V~) and I want to deliver only 0 to 500W to it.
>>
>> anyone have a idea or link or anything that can help me? I think
>> about optocupler with zero cross unit but I need help about that?

Jinx> A couple of circuits here that should help

Jinx> http://home.clear.net.nz/pages/joecolquitt/txless.html

Jinx> For a heater you can count zero crossings and switch the element
Jinx> on/off for whole cycles (not suitable for lights, too flashy). The closer
Jinx> to the z-c ...

Thanks Jinx now I will go to see what you suggest me!

Anyone with more links, ideas?! I need this for 'yesterday'! :-)

branek

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2002\08\10@223026 by M. Adam Davis

flavicon
face
Any reason you can't go to the hardware store and buy a 500w heater control?  Even a lamp dimmer (750W or more) should work admirably.

-Adam

Branko Karaklajiæ wrote:

{Quote hidden}

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2002\08\11@051444 by 9-2?B?QnJhbmtvIEthcmFrbGFqaeY=?=

Zdravo M.,

Sunday, August 11, 2002, 4:29:49 AM, ste napisali:

M.> Any reason you can't go to the hardware store and buy a 500w heater M.> control?  Even a lamp dimmer (750W or more) should work admirably.

Well I was asked from some firm here in YU to build this for them
because they have 2000 heaters and want to build regulators by
themselves. That's only reason!

M.> -Adam

M.> Branko Karaklajiæ wrote:

>>Hello,
>>
>.....

-- sincerely,
Branko
branekspamKILLspameunet.yu
http://solair.eunet.yu/~branek
ICQ: 15616778

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2002\08\12@041346 by Alan B. Pearce

face picon face
>Well I was asked from some firm here in YU to build this for them
>because they have 2000 heaters and want to build regulators by
>themselves. That's only reason!

Use a CA3059 SCR/Triac controller.

http://www.onsemi.com/pub/SocketSearch/1,1319,,00.html?qt=ca3059

These devices are just so simple to use there is no argument.

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