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AC Control - Triac

MichelBMichelB Posts: 154
edited 2009-09-30 20:25 in General Discussion
Has anyone (in particular Parallax engineers) built the circuit figure 146.1:SSR Schematic from The Nuts & Volts, Volume 8, Column #146 since the post of InSilico dated 1/3/2009. If yes can we see a picture? Thank you.

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2009-09-29 16:53
    Hello,

    Which figure are you referring to? The figures aren’t listed as 146.x they’re listed as 8.x. Also, I saw no reference to InSilico in that column. Can you clarify what you mean?

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    Chris Savage

    Parallax Engineering
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  • MichelBMichelB Posts: 154
    edited 2009-09-29 18:24
    I'm sorry dear Chris, in Volume 8, Column #146: "Dimming the lights Fantastic", the first figure is Figure 146.1:SSR Schematic. InSilico is the first person and the last who posted a thread about that and you were the first to give an answer to him on 1/3/2009. My question is: has anyone built this circuit on a Board of Education (in particular Parallax engineers). Best regards.

    P.S.: I want to know if it's dangerous for BS2 board due to the fact that "hot" passes through a 180 ohms resistor in the breadboard and what resistor needed if AC is 220 VAC instead of 115 VAC?
  • Shawn LoweShawn Lowe Posts: 635
    edited 2009-09-29 19:09
    MichelB-
    I'm going to say probably not. From the article:

    "It would take a very hearty soul to tackle this project using point-to-point wiring – and with
    120 VAC involved let me suggest that you don’t."

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    Shawn Lowe


    When all else fails.....procrastinate!
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2009-09-29 20:46
    Ok, I see the column you’re referring to now…I was on Column #8 originally. In any event the opto connects to a Triac to control the lights…in building something like this there are extensive safety factors to consider. I would say if you have any doubts about your ability to do it then you should wait until you’re more comfortable working with higher voltages. The breadboard really isn’t the place for high AC voltages.

    As a note…when referring to an article and/or a thread you should link these in your post. Take care.

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    Chris Savage

    Parallax Engineering
    50 72 6F 6A 65 63 74 20 53 69 74 65
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  • James LongJames Long Posts: 1,181
    edited 2009-09-29 22:18
    Shawn,

    Although I do not know the reference you speak of......I have built a couple of Triac control circuits.

    If you would like to continue off list, you can email me.

    I would never post a schematic or circuit on board just for safety reasons. AC voltages should be respected, and are nothing to play with. Doing it right.....and being extremely careful is the mode of operation when dealing with line voltage.

    James L

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    James L
    Partner/Designer

    Lil Brother SMT Assembly Services

    Please note: Due to economic conditions the light at the end of the tunnel will be turned off until further notice. Thanks for your understanding.
  • Shawn LoweShawn Lowe Posts: 635
    edited 2009-09-30 16:56
    MichelB-
    EFX-TEK, which is partly owned by Jon Williams who wrote that article, sells a board called a FC-4 which dims 120V lights. Give their website a look.

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    Shawn Lowe


    When all else fails.....procrastinate!
  • James LongJames Long Posts: 1,181
    edited 2009-09-30 20:25
    Shawn Lowe said...
    MichelB-
    EFX-TEK, which is partly owned by Jon Williams who wrote that article, sells a board called a FC-4 which dims 120V lights. Give their website a look.

    Wow...I didn't know that.....pretty cool.

    I should really work on some of the projects I have going...and get them out there for the masses. I'm always too busy putting stuff together for others. Oh well....the story of my life.

    James L

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    James L
    Partner/Designer

    Lil Brother SMT Assembly Services

    Please note: Due to economic conditions the light at the end of the tunnel will be turned off until further notice. Thanks for your understanding.
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