Show Posts
Pages: [1]
1  Using Arduino / LEDs and Multiplexing / Re: Controlling Multiple LED Drivers with single PWM Output on: October 04, 2012, 08:44:20 pm
Sorry, sent that message off my phone, meant 1 or 2k ohm resistor.

Will be a few weeks before i get to sorting this one out.

I'll let you guys know how it all goes.

Cheers
2  Using Arduino / LEDs and Multiplexing / Re: Controlling Multiple LED Drivers with single PWM Output on: October 04, 2012, 04:33:49 pm
Thanks everyone... Might try a 1 or 2 ohm resistor just to be on the safe side... The mega does have a lot of pins however I'll probably be using about 7 or 8 of them...

Thanks again

Dan
Australia
3  Using Arduino / LEDs and Multiplexing / Re: Controlling Multiple LED Drivers with single PWM Output on: October 04, 2012, 07:26:42 am
Thanks for the replies everyone.

I'm planning on running a maximum of 2 drivers off one single pwm output.
So will I need a buffer?

I have the spec sheet for the drivers however there's no mention about the current draw on the pwm input.

Regards

Dan
Australia
4  Using Arduino / LEDs and Multiplexing / Re: Controlling Multiple LED Drivers with single PWM Output on: October 04, 2012, 12:33:17 am
Thanks for that Mike,

I will split them into two first and measure the current draw between the Mega and where i split to the drivers.

You mentioned a buffer chip.  Can you provide me any info or direction where to do some research on buffer chips?

Thanks
5  Using Arduino / LEDs and Multiplexing / Controlling Multiple LED Drivers with single PWM Output on: October 03, 2012, 08:12:29 pm
Hi Everyone,

I'm very new to this and have a question i can't seem to find an answer on.
I have an LED aquarium project where strings of LED's are controlled by buckpacks / drivers.  My drivers accept a 0-5V pwm input.
Each of these drivers accept an PWM input to control the output current.

My problem is, I have a lot of drivers.

Can i split a single PWM output from my Arduino Mega to drive two or three LED drivers?  Or will this affect the 0-5v signal the pwm output each driver would receive if i was try and run more than one driver off one pwm output?

I hope that makes sense.

All info would be appreciated.

Regards

Dan
Australia

Pages: [1]