Page 1 of 1

Light dimming

Posted: Sun Jan 31, 2016 7:11 pm
by kamenyev
First of all, I would like to mention that I'm happy to find this site and really thankful for the inspiration I've got from SuperHouseTV.

In another topic Jonathan mentioned the lack of dimming control caused by the relays in the system. What would be the ideal/practical solution to make the system able to dim the lights?
As far as I can imagine, it would require modifications in the high voltage and the control side as well.

Re: Light dimming

Posted: Tue Jul 05, 2016 8:28 pm
by Sixfold
Instead of using a relay to control the mains voltage you will need to use a triac with a zero cross detection circuit. You need the zero cross because of how the triac interacts with the AC voltage. There are some premade boards on eBay.

Re: Light dimming

Posted: Wed Jul 06, 2016 12:42 am
by lemmings
If your light fixture uses AC, then some of the TRIAC dimmers available at:

http://www.inmojo.com/search/?type=products&s=dimmer

may do the trick as long as your light fixture is dimming compatible (i.e. either incandescent, LED corn bulb, or LED bulb/driver that is TRIAC dimming compatible, some fluro).

In the specific case of an AC lighting circuit connected to an LED driver, there are drivers on the market that can be wired up with an extra wire pair for a dimming signal (DALI, PWM, 0-10V, or resistor) but that is going to be difficult unless you are renovating.

If your light circuit is instead low voltage DC connected directly to an LED, you will need to dim by either:
  1. Digital dimming (PWM the DC voltage)
  2. Analog dimming (Adjustable constant current source)
PWM will be easier to implement, gives dimming from 0% to 100%, but will flicker if you don't have a high enough PWM rate. I haven't looked into high current PWM dimmers that can easily be controlled by a micro controller. Any product suggestions would be great (otherwise will look at using a MOSFET on a protoshield).

Analog dimming will be harder to implement and I wouldn't try that unless you can find a constant current driver that has an input for dimming control (like some Meanwell models).

Re: Light dimming

Posted: Tue Nov 29, 2016 1:38 am
by Sixfold
OK I am having a problem, and thought others may as well, so adding it to this highly relevant thread.

The setup:
I am using one of these http://www.inmojo.com/store/krida-elect ... e-arduino/ triac boards with zero cross detection.

Along with that, my fixture is a dimmable driverless 120v (USA) AC LED light. Specifically the Intertek led-sm6dl.

Im not sure that it matters but I am driving the triac with an esp8266 (wemos mini).


The Problem:
So I wrote out my code and everything works fine when I am only using 1 light fixture. No noticeable flicker, good dimming range, no noise. However, when I connect 2 or more lights, I get horrible flashing. Like seizure inducing.

Another wrinkle. I bought a leviton 6672 dimmer switch. And that thing works great. No flashing at all. No matter how many lights I connect. So I opened it up and from what I can tell its just a triac controlled by a pot. But, it has a huge inductor in there along with some capacitors. I was wondering if I am just missing a smoothing circuit of some sort on my setup? I dont believe its a software issue but anything is possible.

Any thoughts would be appreciated.

Thanks
Sixfold

As a side note, this is for my home automation project. I am planning a lengthy write up eventually, so you dont all have to waste hours troubleshooting like I did.

chenjinyan

Posted: Fri Jan 12, 2018 2:31 am
by clibin009
mbt shoes
louboutin
ray ban wayfarer
canada goose outlet
ugg outlet
michael kors uk
moncler schweiz
nfl jerseys wholesale
ugg boots on sale
air max
polo shirts
coach outlet online
vibram five fingers
longchamp outlet
adidas football boots
ugg boots
coach outlet
michael kors outlet
swarovski
cheap nfl jerseys
michael kors handbags
nike outlet store
mont blanc
scarpe mbt
the north face
adidas wings
ugg outlet
michael kors outlet
uggs outlet
scarpe hogan
ugg boots
ugg boots
adidas jeremy scott
cheap mlb jerseys
nike sb
nhl jerseys
cheap ray bans
michael kors outlet clearance
cheap nhl jerseys
michael kors
tory burch
pandora rings
canada goose jackets
michael kors handbags
moncler
ugg clearance
giuseppe zanotti shoes
coach outlet online
cheap nfl jerseys
cheap rolex watches
kate spade
michael kors outlet
coach handbags
ugg boots
tory burch
jordans
louboutin
nike air force
jordans
michael kors handbags
nike air
balance shoes
salvatore ferragamo
air max
nike outlet
oakley sunglasses
north face
coach factory outlet online
fitflops
birkenstock
nike football boots
timberland outlet
ralph lauren
ugg australia
michael kors
ugg
nike tn
birkenstock outlet
coach outlet online
pandora charms
nike blazer
ralph lauren outlet
ray ban sunglasses
pandora jewelry
ralph lauren uk
coach factory outlet online
coach outlet online
pandora jewelry
fitflops outlet
ray ban sunglasses
the north face
jordan retro
coach outlet online
timberland boots
hermes
polo ralph lauren
moncler
ugg outlet
coach outlet online
nike free run
nike uk
stan smith shoes
ugg boots sale
pandora jewelry canada
birkenstock sandals
north face uk
burberry scarf
canada goose jackets
longchamp
pandora jewelry
louboutin
coach factory online
ralph lauren
canada goose
air max
polo ralph lauren outlet
michael kors outlet
true religion jeans
oakley sunglasses wholesale
ralph lauren
michael kors outlet online
ugg outlet
burberry outlet
uggs
adidas yeezy
tory burch outlet
ray ban
air jordan 14
supreme outlet
kate spade handbags
ugg boots
nike outlet
north face jackets
ray ban
ray ban
ralph lauren uk
michael kors outlet
longchamp
louboutin
supreme uk
mont blanc pens
true religion jeans
prada
beats by dre
cheap jordans
nike factory outlet
jordan
ugg canada
ugg boots
nike huarache shoes
moncler outlet
coach outlet online
north face outlet
burberry scarf
tommy hilfiger
jordans
ray ban
ugg outlet store
coach factory outlet
nba jerseys
north face
oakley sunglasses
michael kors outlet
nike store uk
oakley sunglasses
louboutin
true religion jeans
flops
cheap mlb jerseys
the north face
under armour outlet
canada goose outlet
michael kors taschen
canada goose outlet
nike air max
pandora charms
tory burch outlet
true religion jeans
coach outlet
christian louboutin
ray ban
ray ban
ugg
jordan shoes
nike air max
ugg outlet
ferragamo outlet
ugg pas cher
moncler pas cher
polo ralph lauren
air jordan
michaelkors outlet online
moncler
coach
basketball shoes
uggs
juicy couture outlet
canada goose jackets
canada goose jackets
pandora uk
mac cosmetics
kate spade
moncler
air jordan
jordans
snapbacks wholesale
hermes outlet
ray ban sunglasses
ralph lauren
canada goose sale
michael kors outlet
cheap ugg boots
cheap ugg boots
polo ralph
manolo blahnik shoes
polo ralph
canada goose jackets
coach handbags
adidas outlet store
moncler outlet
flops
north face outlet
ugg italia
ralph lauren uk
mlb jerseys
coach outlet
ugg boots
north face jackets clearance
ugg outlet
burberry outlet canada
uggs
flip flops
doudoune canada goose
ugg boots
uggs outlet
ugg
coach outlet online
polo ralph lauren
oakley sunglasses
ray ban sunglasses
adidas stan smith shoes
swarovski crystal
uggs outlet
air jordan
flip flops
north face jackets
michael kors outlet
jordan shoes
uggs outlet
nike air max
polo ralph
timberland pro
jordan
north face
uggs outlet
replica watches
ugg boots
longchamp outlet
jordan shoes
canada goose
hermes birkin bags
north face uk
polo ralph lauren
adidas superstar
canada goose
red bottom shoes
jordan shoes
pandora
mcm bags
nike factory outlet
adidas uk
ray ban sunglasses wholesale
ugg
canada goose outlet
adidas shoes
prada handbags
coach factory outlet
supra shoes
burberry outlet online
louboutin
moncler
baseball jerseys
michael kors outlet
kate spade
north face
air max
supreme
uggs outlet
oakley sunglasses
coach factory outlet
adidas outlet
cheap oakley sunglasses
oakley canada
michael kors handbags
ugg boots
mulberry handbags
north face
canada goose jackets
ugg boots
true religion
coach outlet
canada goose
ugg boots
michael kors outlet
north face outlet
coach factory outlet
louboutin
uggs outlet
christian louboutin
timberland boots
ugg
oakley sunglasses
ferragamo shoes
ugg boots
louboutin
prada
kate spade
moncler outlet
hermes uk
canada goose canada
the north face
nike outlet
timberland boots
north face
ugg canada
oakley vault
doudoune canada goose
ugg outlet
coach outlet
oakley sunglasses
cheap nfl jerseys
nfl jerseys wholesale
canada goose sale
moncler jackets
prada bags
moncler
jordan shoes
true religion jeans
moncler
soccer jerseys
canada goose jackets
blackhawks jersey
ray ban sunglasses
longchamp handbags
moncler
coach
moncler jackets
nike air huarache
ralph lauren
pandora jewelry canada
longchamp
mont blanc pens
superdry clothing
converse shoes
louboutin
jordan pas cher
ugg boots
kate spade outlet
canada goose
ugg boots
ralph lauren
cheap nfl jerseys
adidas shoes
20181.12chenjinyan