Augustica.com

Dejavu® • Christmas Sale

2016-12-21T10:41:46-05:00

Christmas sale is on till December 31, 2016. Go to http://www.augustica.com

Statistics: Posted by Augustica.com — 21 Dec 2016, 10:41

Dejavu® • Re: SPL Meter Project

2015-12-01T11:17:36-05:00

DejaVU is programmed to operate as a 16 LED per channel VU meter and cannot be reprogrammed.

Statistics: Posted by Augustica.com — 01 Dec 2015, 11:17

Dejavu® • Re: SPL Meter Project

2015-12-01T11:14:45-05:00

OK, what about the question concerning the programming?

Statistics: Posted by Focus — 01 Dec 2015, 11:14

Dejavu® • Re: SPL Meter Project

2015-12-01T11:09:59-05:00

DejaVU is designed to operate as a 16 LED per channel VU meter. It is not suited for the project you are contemplating.

Statistics: Posted by Augustica.com — 01 Dec 2015, 11:09

Dejavu® • SPL Meter Project

2015-12-01T10:39:29-05:00

I 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)

Statistics: Posted by Focus — 01 Dec 2015, 10:39

Dejavu® • Re: Adjusting brightness

2015-04-19T06:54:12-05:00

Yes, you can adjust the brightness of LEDS by installing a variable resistor. However, it is unlikely that it will be necessary.

Statistics: Posted by Augustica.com — 19 Apr 2015, 06:54

Dejavu® • Adjusting brightness

2015-04-18T10:45:37-05:00

Hello,

Is it at all possible to adjust the brightness of the LEDs with a potentiometer or button? I would be using it indoor and in sunlight, so I would like to be able to adjust brightness. Is this at all possible?

Statistics: Posted by rosa — 18 Apr 2015, 10:45

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-11T21:16:35-05:00

1. What do you mean "and nothing". We only can help if you post thoughtful well written messages.
2. The IC must not be hot. Did you place it in the right direction in the socket? Or perhaps you rushed through the assembly and misplaced some part.
3. This kit always works. You REALLY have to make an effort for it not to work.
4. Post photos of the top and bottom of your assembled PCB.

Statistics: Posted by Augustica.com — 11 Dec 2013, 21:16

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-11T19:16:47-05:00

okay I understand now, I hooked it up the way it should be, I used a pre out on my amp and nothing, the chip get really, really hot. I went through and tested all the led's individually and they all work. Maybe it's just the IC?

Statistics: Posted by Drummer3413 — 11 Dec 2013, 19:16

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-11T11:31:18-05:00

Not necessarily. PIC16F88 is a tough micro controller to destroy. It can handle a lot of abuse. That being said, you have to use attenuator resistors if you want to connect Dejavu to an output of your power amplifier. However, you do not need the attenuator resistors if you connect Dejavu to the input of your power amplifier.

Statistics: Posted by Augustica.com — 11 Dec 2013, 11:31

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-11T11:22:19-05:00

Yes but I'm saying that it's too late i already hooked it up to a power amp. So it's more then likely destroyed.

Statistics: Posted by Drummer3413 — 11 Dec 2013, 11:22

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-11T11:17:10-05:00

There is nothing to be replaced. You need to install attenuator resistors between the left and right channels of the amplifier and Dejavu to make sure that the maximum volume of the signal from the amplifier activates all 16 LEDs ("a full scale deflection") of the Dejavu.

Statistics: Posted by Augustica.com — 11 Dec 2013, 11:17

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-10T23:53:49-05:00

Great..In your opinion what would be the first thing to replace.

Statistics: Posted by Drummer3413 — 10 Dec 2013, 23:53

Dejavu® • Re: Connecting Dejavu to an amplifier

2013-12-10T17:46:04-05:00

The Dejavu's PCB has a four prong connector K1. The prongs are marked as GND, +5V, RIN, and LIN. GND and +5V and connected to the ground bus and +5V bus of your power supply. The RIN and LIN prongs of K1 are connected to the right and left channels of your amplifier respectively. Dejavu is designed to be used with a preamplifier and/or a headphone amplifier and therefore requires a very low voltage (20 mVolt) to activate each of the 16 LEDs. A "full scale deflection" (all 16 LEDs activated) will require a signal of about 320 mVolt.

DO NOT connect Dejavu to a an output of a power amplifier. You will destroy it.

Statistics: Posted by Augustica.com — 10 Dec 2013, 17:46

Dejavu® • Connecting Dejavu to an amplifier

2013-12-10T16:46:14-05:00

Hello, could someone please tell me how I would go about hooking this VU meter to a stereo amplifier?

Statistics: Posted by Drummer3413 — 10 Dec 2013, 16:46