Hello all,
I learned from many experts here to dim LED strips from power adapter (it has the dimming function).
I found that it is much cheaper to dim each LED strip using manual dimmer or digital regulator.
Here is the illustration about circuit setup.
My questions:
Any suggestions?
Thank you all.
Is this setup feasible?
Yes. But there is so little detail that there is not much to object to.
How can I do this task in Arduino instead of using manual dimmers?
Use a "dimmer / regulator" that will take PWM.
Are you asking people here to design your system for you? We need to know a lot more about your requirements before any more specific advice can be given.
Like what the LEDs are that work from 42V?
Yes. I am asking for professional advice about this project -- dimming individual LED strip powered by one power source.
If manual dimmer works, I just connect dimmer to LED power wires. However, I need to manually dim the light every time.
As discussed in my previous post, LED light intensity can be adjusted by controlling the PWM right on the power supply. But this way I need to spent more budget on power supply. I would like to connect all LEDs to one power supply and adjust light intensity for each LED strip using Arduino.
Thanks for your guidance.
PWM 3 x mosfets.....
I hope you realise that that 42volt supply you have drawn is NOT a 42 volt supply.
It is a 600watt 7-14Amp constant CURRENT LED supply that is protected at about 42 volt.
You can't just use it as a supply. It will be constantly running in protection mode.
This supply, with 42volt LEDs, needs to be loaded with at least 300watt LEDs.
Leo..
As discussed in my previous post,
Well it would have been good to know that first, I am not a mind reader.
When starting a thread you need to include all the information for people like myself who have not read your previous thread.
You need drivers that are capable of PWM control. Not all constant current drivers are.
I would like to see the datasheet of those 42volt LED strips. Never seen one.
If you say that they are 42 volt LED strips, they must have current limiting resistors on them.
Leo..
Thank you guys. 
Please see my reply.
Wawa:
I would like to see the datasheet of those 42volt LED strips. Never seen one.
If you say that they are 42 volt LED strips, they must have current limiting resistors on them.
Leo..
Here is the electric specification for the 42V LEDs:
Input Voltage : AC/DC 42 - 45 V
Driver Current : 550 - 600 ma
Electrostatic Discharge : ±4.0 KV(HBM)
Input Frequency : 50 - 60 Hz
Power Consumption : 25 W ± 1 W
Not sure if it helps. Please let me know if I need to look into the spec sheet.
Wawa:
I hope you realise that that 42volt supply you have drawn is NOT a 42 volt supply.
It is a 600watt 7-14Amp constant CURRENT LED supply that is protected at about 42 volt.
You can't just use it as a supply. It will be constantly running in protection mode.
This supply, with 42volt LEDs, needs to be loaded with at least 300watt LEDs.
Leo..
I have another 120W power supply (same brand/model).
It can drive up to 5 LEDs.
The DC end on the power supply is 14AWG. The hookup wire I am using is 26AWG. Is that qualify for wiring DC end to LEDs (42VDC, 0.6A for each one)?
Grumpy_Mike:
Well it would have been good to know that first, I am not a mind reader.When starting a thread you need to include all the information for people like myself who have not read your previous thread.
You need drivers that are capable of PWM control. Not all constant current drivers are.
The drivers (link) I am using are capable of PWM control via 0~10Vdc or PWM signal or resistance.
Not sure if it helps. Please let me know if I need to look into the spec sheet.
You were asked for a link to these LEDs or their data sheet not you picking up random lines from it.
changks:
Here is the electric specification for the 42V LEDs:Input Voltage : AC/DC 42 - 45 V
Driver Current : 550 - 600 ma
Electrostatic Discharge : ±4.0 KV(HBM)
Input Frequency : 50 - 60 Hz
Power Consumption : 25 W ± 1 W
No, that does not help.
There are no AC/DC 50-60hz LEDs.
This must be some sort of LED fitting with rectifier and/or other parts inside.
Datasheet....
Leo..