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Basic stamp to control brightness of 110vAC light circuits — Parallax Forums

Basic stamp to control brightness of 110vAC light circuits

ArchiverArchiver Posts: 46,084
edited 2001-11-27 05:54 in General Discussion
Hi,

I need a circuit that will allow me to use a basic stamp to control the
brightness of several 110vAC incandescent lamps. I'd like to use a triac to
control the 110 I just need a circuit to connect the output from the stamp
to the gate of the traic to control the 110. I can't have any flicker on the
lamp, just a steady dim. Any ideas?

What type of protection do I need to isolate the triac's gate from the stamp
I/O?


Thanks in advance for any advice.


Tim

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-11-25 18:31
    I asked this question two weeks ago and got no response. But since then
    I have had time to research the query and have the following
    suggestions:

    http://www.vsv.slu.se/johnb/papers/aesa83.htm

    There is one circuit for AC & one for DC. If you decide to make a PCB
    circuit for either of these, let me know.

    Also the following link will provide more info if you need it:

    http://www.google.com/search?q=triac+phase+control&hl=en&start=10&sa=N


    kind regards,

    Leroy

    Tim wrote:
    >
    > Hi,
    >
    > I need a circuit that will allow me to use a basic stamp to control the
    > brightness of several 110vAC incandescent lamps. I'd like to use a triac to
    > control the 110 I just need a circuit to connect the output from the stamp
    > to the gate of the traic to control the 110. I can't have any flicker on the
    > lamp, just a steady dim. Any ideas?
    >
    > What type of protection do I need to isolate the triac's gate from the stamp
    > I/O?
    >
    > Thanks in advance for any advice.
    >
    > Tim
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and Body
    of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-11-27 04:09
    Velleman makes a niffty light dimmer controled by
    voltage - 0 to 10VDC. Drive it with a DAC from the BS.
    Works great, though a little pricey $22 from Jameco.
    I think it will handle 500 watts.
    Lew
    --- Tim <time@i...> wrote:
    > Hi,
    >
    > I need a circuit that will allow me to use a basic
    > stamp to control the
    > brightness of several 110vAC incandescent lamps. I'd
    > like to use a triac to
    > control the 110 I just need a circuit to connect the
    > output from the stamp
    > to the gate of the traic to control the 110. I can't
    > have any flicker on the
    > lamp, just a steady dim. Any ideas?
    >
    > What type of protection do I need to isolate the
    > triac's gate from the stamp
    > I/O?
    >
    >
    > Thanks in advance for any advice.
    >
    >
    > Tim
    >
    >
    >
    >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed.
    > Text in the Subject and Body of the message will be
    > ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    >
    >


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  • ArchiverArchiver Posts: 46,084
    edited 2001-11-27 05:54
    Tim,
    Here's one option: You can accomplish this with a Stamp, a pair of
    optocouplers and a few supporting components. Use one opto chip with a fast
    transistor output with high CTR to detect zero-crossings. When this input
    changes state have the Stamp pulsout after a pause, the length of which is
    determined by another input and rctime (your voltage input). Let the pulsout
    fire a second optocoupler with a triac output into your power triac's gate.
    Of course you'll have to set each opto LED's and the triac gate current with
    properly sized resistors.
    The result is a $5 dimmer. The downside is the limit imposed by the Stamp
    pause - in 1 msec increments. I have done this w/ BS2 and had only 15
    dimming levels, but it was reliable.
    Chris

    >
    Original Message
    > From: Tim [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=gv7R1kWqZJYuCN0qBE-HxN8xg8jstEZRIjxCIlTwIk938TgKlsRd3tqoMHIMP3kydCbSGB5E]time@i...[/url
    > Sent: Sunday, November 25, 2001 12:34 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] Basic stamp to control brightness of
    > 110vAC light
    > circuits
    >
    >
    > Hi,
    >
    > I need a circuit that will allow me to use a basic stamp to
    > control the
    > brightness of several 110vAC incandescent lamps. I'd like to
    > use a triac to
    > control the 110 I just need a circuit to connect the output
    > from the stamp
    > to the gate of the traic to control the 110. I can't have any
    > flicker on the
    > lamp, just a steady dim. Any ideas?
    >
    > What type of protection do I need to isolate the triac's gate
    > from the stamp
    > I/O?
    >
    >
    > Thanks in advance for any advice.
    >
    >
    > Tim
    >
    >
    >
    >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the
    > Subject and Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    >
    >
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