SPL Meter Project
Posted: 01 Dec 2015, 10:39I am looking at the DejaVU for a project that I have in mind to build.
Instead of using just the 16 LEDs per channel, what I am doing is using seperate PCBoards with 72 LEDs per board, and I will be using 16 of these boards. The boards are all powred by 12V and are running off of relay packs that are triggered by logic level voltage and require 15-20mA Driver Current per channel.
The way I will use the dejavu is as follows: I will run it in mono feeding the same output from a microphone preamp to both channel inputs on the dejavu. I will leave one set of LEDs soldered to the board for visual confirmation and use the other set of LED outputs to drive the relay pack inputs.
Here are my questions:
1. Will the DejaVU be able to output the necessary TTL High voltage with 15-20mA Driver Current per channel?
2. If so, what are the modifications I need to do? (I would assume changing of one or more resistors)
3. Is it possible to change the function in the PIC Programming for the switch that controls Bar Scale/Dot Scale and leave it always on Bar scale and instead use that switch just to do a pre-programmed patterned sequence? (Kind of like a Demo mode not reacting to sound)
Instead of using just the 16 LEDs per channel, what I am doing is using seperate PCBoards with 72 LEDs per board, and I will be using 16 of these boards. The boards are all powred by 12V and are running off of relay packs that are triggered by logic level voltage and require 15-20mA Driver Current per channel.
The way I will use the dejavu is as follows: I will run it in mono feeding the same output from a microphone preamp to both channel inputs on the dejavu. I will leave one set of LEDs soldered to the board for visual confirmation and use the other set of LED outputs to drive the relay pack inputs.
Here are my questions:
1. Will the DejaVU be able to output the necessary TTL High voltage with 15-20mA Driver Current per channel?
2. If so, what are the modifications I need to do? (I would assume changing of one or more resistors)
3. Is it possible to change the function in the PIC Programming for the switch that controls Bar Scale/Dot Scale and leave it always on Bar scale and instead use that switch just to do a pre-programmed patterned sequence? (Kind of like a Demo mode not reacting to sound)