Dear.
I need to make controls for a project and would like to use a DAC, but I've never worked with this device.
I have a project in which 7 LEDs are pulsed using 7 TTL signals coming from an Arduino. However, this array of LEDs are not pulsed all together and not one by one. They are pulsed in various combinations in which is not a sequential sequence. For example: in some moment the LEDs 1, 2, 3 and 5 are pulsed. At another moment the LEDs 1, 4, 5 and 6 are pulsed. Another question is, I need to control the current passing through each one LED to control its luminous intensity. Each LED is connected in a circuit switched by a transistor where an Arduino port opens and closes that transistor with a signal at the base.
So I think a DAC could help me do this intensity control of each LED by controlling the voltage applied to the base of the transistor. This voltage would be modulated through an output of the DAC which is controlled by the Arduino.
So I have some doubts about the operation of the TLC5628 DAC. First I would like to know if it is possible to simultaneously use more than one output of this DAC (TLC5628) so that each DAC output has its own voltage level? Also, is it possible to use a combination of outputs of this DAC in any combination that I desire?