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AC Dimmer Circuit

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Overview

Simple AC Dimmer circuit for incandescent bulbs. 128 levels of brightness. Parts are relatively cheap!


How it Works


Photo

  • Digital Signals. The four signals on the left. They are labelled on the board.
    • Yellow: light dimming signal, comes from Arduino digital pin 11.
    • White: zero-cross signal, goes to Arduino digital pin 2 in.
    • Red: arduino +5V supply.
    • Black: arduino GND.
    • The LED on board should dim or fade along with the AC light source. Fading will not work until AC power is connected, it depends on the zero-cross info from the H11AA1 chip.
  • AC Signals. The four white cords on the right. The bottom two cables on the right are the AC plug. The top two are the Bulb. These are labelled on the board, but are partially covered by the large screw terminals.
    • Bottom is AC Power - Neutral.
    • Bottom Middle is AC Power - Hot.
    • Top Middle is Bulb - Hot.
    • Top is Bulb - Neutral.
    • NOTE: For help identifying Hot and Neutral on lamp cord, look here.

Code

  • example with slow on/off fade: Download file "acdimmer_sleeping.zip"
  • example with potentiometer control: Download file "acdimmer_pot.zip"


Schematic



Board Layout


PCB Files

  • EagleCAD - Download file "acdimmer_11_eagle.zip"

  • Gerber - Download file "acdimmer_11_gerber.zip"

Building the Circuit

Parts


From a PCB

If you had some of these manufactured, then you'll want to build the PCB. See our tutorial on Populating a Fabricated PCB.


On a Breadboard

CLICK THROUGH FOR ANNOTATED FLICKR VERSION

IMG_3596

Notes

  • Make sure your Triac (T1, BTA12-600) is rated at high enough current for the device you are controlling. The product linked above is rated at 12Amps RMS. That's a lot of current!
  • Alternative TRIACs with different power ratings:

Alternative Design

Alternative SSR instead of MOC/Triac combination:
AC Phase Control (that's what we are doing):

http://arduino.cc/playground/Code/ACPhaseControl


Comments

/groups/general/search/index.rss?tag=hotlist/groups/general/search/?tag=hotWhat’s HotHotListHot!?tag=hot22/groups/general/sidebar/HotListeshankenEdward Shanken2014-04-17 02:53:53+00:002014-04-17 02:53:53updated15eshankenEdward Shanken2014-04-04 21:52:26+00:002014-04-04 21:52:26updated14eshankenEdward Shanken2014-04-04 10:58:50+00:002014-04-04 10:58:50updated13eshankenEdward Shanken2014-04-04 10:57:19+00:002014-04-04 10:57:19updated12eshankenEdward Shanken2014-04-04 10:54:22+00:002014-04-04 10:54:22updated11eshankenEdward Shanken2014-04-04 10:32:31+00:002014-04-04 10:32:31updated10eshankenEdward Shanken2014-04-04 09:53:15+00:002014-04-04 09:53:15updated9eshankenEdward Shanken2014-04-04 09:33:53+00:002014-04-04 09:33:53updated8eshankenEdward Shanken2014-04-04 09:32:20+00:002014-04-04 09:32:20updated7eshankenEdward Shanken2014-04-01 01:22:12+00:002014-04-01 01:22:12updated6Added tag - hoteshankenEdward Shanken2014-04-01 01:22:06+00:002014-04-01 01:22:06addTag5eshankenEdward Shanken2014-03-07 04:03:02+00:002014-03-07 04:03:02updated4eshankenEdward Shanken2014-03-06 04:02:20+00:002014-03-06 04:02:20updated3eshankenEdward Shanken2014-03-06 01:20:04+00:002014-03-06 01:20:04updated2First createdeshankenEdward Shanken2014-03-06 01:19:29+00:002014-03-06 01:19:29created1wiki2014-04-17T02:53:53+00:00groups/general/wiki/5b1a1FalseDXARTS 490 SP14 - SURVEILLANCE CULTURE/groups/general/wiki/5b1a1/DXARTS_490_SP14__SURVEILLANCE_CULTURE.htmlEdward Shanken15 updatesDXARTS 490 SP14 - SURVEILLANCE CULTURE SURVEILLANCE CULTURE: PRIVACY, PUBLICITY, ART, TECHNOLOGY According the American Civil Liberties Union, the US government is “regularly tracki...Falseeshanken2014-04-17T02:53:53+00:00hbbenardHector Benard2014-04-06 20:13:10+00:002014-04-06 20:13:10updated52hbbenardHector Benard2014-04-06 20:10:32+00:002014-04-06 20:10:32updated51hbbenardHector Benard2014-04-06 20:08:25+00:002014-04-06 20:08:25updated50hbbenardHector Benard2014-04-06 20:08:06+00:002014-04-06 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Benard2013-06-24 16:50:53+00:002013-06-24 16:50:53updated9hbbenardHector Benard2013-06-24 16:36:06+00:002013-06-24 16:36:06updated8hbbenardHector Benard2013-06-24 15:19:09+00:002013-06-24 15:19:09updated7hbbenardHector Benard2013-06-24 15:18:47+00:002013-06-24 15:18:47updated6hbbenardHector Benard2013-06-24 15:18:38+00:002013-06-24 15:18:38updated5hbbenardHector Benard2013-06-24 15:06:04+00:002013-06-24 15:06:04updated4hbbenardHector Benard2013-06-24 15:05:11+00:002013-06-24 15:05:11updated3hbbenardHector Benard2013-06-24 06:16:22+00:002013-06-24 06:16:22updated2First createdhbbenardHector Benard2013-06-24 06:15:24+00:002013-06-24 06:15:24created1wiki2014-04-06T20:13:10+00:00groups/general/wiki/52d49FalseSchedule - Summer 2012/groups/general/wiki/52d49/Schedule__Summer_2012.htmlHector Benard52 updatesSchedule - Summer 2012 <<Back to DXARTS wiki Home Overview Syllabus Schedule Assignments Resources Student Projects Examples Please ...Falsehbbenard2014-04-06T20:13:10+00:00hbbenardHector Benard2014-04-06 20:12:43+00:002014-04-06 20:12:43updated25hbbenardHector Benard2013-09-23 21:58:08+00:002013-09-23 21:58:08updated24hbbenardHector Benard2013-09-23 21:57:13+00:002013-09-23 21:57:13updated23hbbenardHector Benard2013-09-23 21:55:41+00:002013-09-23 21:55:41updated22hbbenardHector Benard2013-07-03 23:26:31+00:002013-07-03 23:26:31updated21hbbenardHector Benard2013-06-25 18:01:57+00:002013-06-25 18:01:57updated20hbbenardHector Benard2013-06-24 16:20:36+00:002013-06-24 16:20:36updated19hbbenardHector Benard2013-06-24 15:17:31+00:002013-06-24 15:17:31updated18hbbenardHector Benard2013-06-24 15:17:14+00:002013-06-24 15:17:14updated17hbbenardHector Benard2013-06-24 15:15:30+00:002013-06-24 15:15:30updated16hbbenardHector Benard2013-06-24 15:14:05+00:002013-06-24 15:14:05updated15hbbenardHector Benard2013-06-24 15:11:50+00:002013-06-24 15:11:50updated14hbbenardHector Benard2013-06-24 15:10:32+00:002013-06-24 15:10:32updated13hbbenardHector Benard2013-06-24 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Summer 2013/groups/general/wiki/cd9ec/DXARTS_460A__Summer_2013.htmlHector Benard25 updatesDXARTS 460A - Summer 2013 <<Back to DXARTS wiki Home Overview Syllabus Schedule Assignments Resources Student Projects Examples DXARTS 460A - Digital Sound Capston...Falsehbbenard2014-04-06T20:12:43+00:00jimifiedJimmy Johnson2014-01-08 22:34:07+00:002014-01-08 22:34:07updated77mtrainorMeghan Trainor2013-07-18 21:04:12+00:002013-07-18 21:04:12updated76mtrainorMeghan Trainor2013-07-18 21:03:47+00:002013-07-18 21:03:47updated75mtrainorMeghan Trainor2013-07-18 21:03:07+00:002013-07-18 21:03:07updated74rtwomeyRobert Twomey2013-07-17 13:48:40+00:002013-07-17 13:48:40updated73rtwomeyRobert Twomey2013-07-15 00:48:50+00:002013-07-15 00:48:50updated72rtwomeyRobert Twomey2013-07-15 00:48:26+00:002013-07-15 00:48:26updated71rtwomeyRobert Twomey2013-07-15 00:47:15+00:002013-07-15 00:47:15updated70rtwomeyRobert Twomey2013-07-15 00:45:53+00:002013-07-15 00:45:53updated69rtwomeyRobert Twomey2013-07-15 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Control Systems for Digital Art Au13 <<Back to DXARTS Wiki Home DXARTS 470: Sensing and Control Systems for Digital Art, Autumn 2013 MW 9:30-11...Falsertwomey2013-11-12T15:31:45+00:00hot/groups/general/search/index.rss?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcomelist/groups/general/search/?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcomeRecent ChangesRecentChangesListUpdates?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcome0/groups/general/sidebar/RecentChangesListmodifiedDateallRecent ChangesRecentChangesListUpdateswiki/welcomeNo recent changes.reverse5searchlist/groups/general/calendar/Upcoming EventsUpcomingEventsListEvents1Getting events…