kuksul08
Enlightened
I have a project I'm working on and I need to distribute current from an LED driver to an array of LEDs.
My ti buck driver outputs a constant 5000mA. I'd like to send that current through a circuit that will "distribute" it to some LEDs, and control that current distribution from an Arduino (PWM for example).
For example:
First I want to send 100% of the current to a single LED.
Then, I want to send 50% to one LED and 50% to a second.
Then, I want to send 10% to one, 60% to a second, and 30% to a third.
...and every ratio in between (programmable from Arduino).
One easy way of doing it is to have n number of independent driver circuits and drive the adjust pin with a PWM signal from the Arduino. However this requires me to have multiple expensive complete driver circuits.
Is there a way to do this in a more simple way, perhaps by using a single driver circuit and a transistor array? Or maybe you have some other creative ideas?
My ti buck driver outputs a constant 5000mA. I'd like to send that current through a circuit that will "distribute" it to some LEDs, and control that current distribution from an Arduino (PWM for example).
For example:
First I want to send 100% of the current to a single LED.
Then, I want to send 50% to one LED and 50% to a second.
Then, I want to send 10% to one, 60% to a second, and 30% to a third.
...and every ratio in between (programmable from Arduino).
One easy way of doing it is to have n number of independent driver circuits and drive the adjust pin with a PWM signal from the Arduino. However this requires me to have multiple expensive complete driver circuits.
Is there a way to do this in a more simple way, perhaps by using a single driver circuit and a transistor array? Or maybe you have some other creative ideas?