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PICList Thread
'[EE]:Newbie Circuit/Parts Question'
2001\06\02@040011 by kben

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Hello Everyone,
I want to control turning on 3 60watt to 100watt light bulbs with a PIC.
I plan on using the circuit I found in the Archives.
www.infosite.com/~jkeyzer/piclist/2000/Nov/att-0613/01-triac.pdf
Can anyone recommend a DigiKey part for Q1(T2800) in the circuit.
DigiKey does stock the MOC3041 part.
Next question is R19 39ohms and R15 250ohms ?
As you can quess I am not an EE, and since I will be playing with
the mains (120vac) I thought I would ask the list.
Thanks in Advance,
Kevin

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2001\06\02@142740 by Bob Blick

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>www.infosite.com/~jkeyzer/piclist/2000/Nov/att-0613/01-triac.pdf
>Can anyone recommend a DigiKey part for Q1(T2800) in the circuit.
>DigiKey does stock the MOC3041 part.

Digi-Key does not carry Motorola parts. The MOC3041 is an optoisolated
triac. It is pretty popular so you should be able to find it or one of its
brothers.

The MOC3041 is meant for 220 volt applications so you could probably use
the MOC3040, meant for 110 volt applications, which is carried at
http://www.bgmicro.com for 99 cents.

The link you supplied asks for a password so I was not able to review the
schematic. Big secrets I suppose?

Cheers,

Bob

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2001\06\03@202142 by kben

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No big secrets Bob. It's just userid/psw = piclist/piclist.
It's just their to keep the bots from mining email addresses.
I'd appreciate it if you could look at the circuit.

Thanks,
Kevin

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2001\06\04@192011 by Bob Blick

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OK, looked at the schematic. It won't work, I suppose whoever drew it just
made an error. You would do well to download Motorola's data sheet for the
MOC3041 since it will show you the recommended circuit.

The triac you mentioned, T2800, is not critical for your circuit so you
could even go to Radio Shack and get their generic triac.

I made a mistake about the MOC3040 though, Motorola's part numbering
scheme is like this:
MOC3040 through MOC3043 are all 400 volt zero-crossing triac, but the 3040
needs 30mA to trigger it, and the MOC3041 only needs 15mA to trigger. 30mA
from a PIC pin is pushing it.

You can use almost any of that line to trigger a triac and light a bulb,
though. I have most often used the MOC3011 which is a 250 volt 15mA
non-zero-crossing part.

Cheers,

Bob

On Sun, 3 Jun 2001 spam_OUTkbenTakeThisOuTspamdca.net wrote:

{Quote hidden}

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