Quadrac ? Has anyone any idea about it...
Joe KiwiTech
According to a circuit diagram a quadrac is a Triac with a Diac
connected to the gate, now I was wondering if I can get a Diac
and connect it inline to the gate of a Triac and it should work, right ?
The reason being is I can't get hold of the original part without ordering
hundreds of them. Please let me know if you think this should work or
not.
any Idea's ?
Cheers.
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Joe Lussy - jlu...@wave.co.nz
Centennial Electronics.
Whitianga, New Zealand.
Ph./ fax 0064 7 866 2996
Consumer & Industrial Electronic Service & Repairs.
Computer Hardware, Fax & Printer Repair Specialists.
Sofie
YES....... it will work just fine...... your Triac with a Diac is
electrically equilevlant to a Quadrac and will substitute just fine.
By the way...... it may be cheaper to canablelize some old light dimmers you
find at thrift stores or garage sales...... or even on closeout sales at
your local hardware store..... most of them use quadracs and some may use
the triac/diac combo.
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Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"Joe KiwiTech" <cybe...@wave.co.nz> wrote in message
news:aall8m$afc$1...@news.wave.co.nz...
Jerry Greenberg
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These low tech light dimmers can use any simple Triac with its matched
Diac and it should work. Make sure that the Traic is rated to a
minimum of 3X of your mains voltage. If you re in a 120 Volt area,
use a minimum of a 400 V rated device. As for the current rating, it
should be rated to atleast 5 to 8 amps max for a standard in-wall type
light dimmer.
ECG5609 is a very popular Philips number that is used in many light
dimmers, under various generic part numbers. This is a standard
TO-220 mount type. An ECG6408 or ECG6411 will work as a matched Diac
for this device. The ECG6411 would be a better match if the dimmer is
to be used on a 220 Volt mains.
ECG5646 has a matched internal Diac inside, and is designed for
compact light dimmer and specific types of motor speed control
applications.
I would use the ECG5646 for a standard wall dimmer switch type device.
These ECG or NTE components are available from most any of the
electronic parts distributors. The NTE are the same series as the
ECG, and are both manufactured by Philips, a few other semconductor
manufactures, and or National Semiconductor.
Jerry Greenberg
http://www.zoom-one.com
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