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
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
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:
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of the message will be ignored.
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>
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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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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/
>
>