Vitim

look up the chip screwed to the back and try to find its datasheet on the internet

Use heat shrink on the wires to add mechanical strength, as vibrations may break some solder joints.

Singular is killing me. Volts*. Sorry.

Datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/12...On the page 44 there's a application diagram, this is the minimum components to use the amplifier IC. You can't connect your audio signal directly to the IC pins, a resistor and capacitor is required on the inputs. But you don't need to buy this, because they are already on the board. You just need to trace them. Your audio input ground is SGND(pin13) and ACGND(pin16) tied with four 470nF capacitors.If you need help, take hi-res pictures with good lighting and sharp focus of the top and bottom of the entire board. Taking pictures on daylight helps a lot with glare and noise.

That's right the RCAs was originally outputs from the cd DAC, but the output of the cd DAC is connect to the inputs of the amp, so I just disconnected the DAC from the circuit then the outputs becomes inputs to the amplifier!

About bridge configuration, typically no unless this configuration is mentioned on the data sheet.Make connections as close as possible to the IC inputs, and do not pick a ground very far from those LR inputs, this is to avoid picking hum. Just be carefully to not bypass the usual ac couple capacitor and input resistor on the inputs, connect it after, or else you will get very distorted sound and might damage the inputs.

cool!

sorry for the long delay, I never seems to get comments notifications. The yellow symbols are a inductor and a capacitor, they are part of the power supply filtering. You can see on the datasheet standby it requires anything from 3volts to VCC (same as input voltage, in this case 12v). Try touching the inputs with your fingers you should hear a hum, if not the IC amp is probably in standby or in mute. Read your datasheet to find which pin controls those things.

Very interesting this gave me an idea for something I want to do!

Nice done! I really like the 3d printed case, mind share the 3d model with the community? I really sorry for this really late reply.

Very nice! My initial idea was to embed this in the amplifier itself, then I thought it would give me more options if it was a standalone thing. I also have a very similar eq. About the arduino code, I haven't touched the code since then, so I don't know whats changed, I was my fault to not document the current version at the time. I'm not sure, but I was using the stable version at the time (aug-2014), I just remember 1.5 was beta at the time, and I was not using it.

Check out Step 7, there is a video with instructions on how to figure out the pinout of your inverter by yourself.

awesome!

It's probably a LED screen, you can make it work as well, you just need to find the correct voltage to drive those led string. The led connections should be a narrow ribbon cable coming from one of the sides of the screen or thin wires.

You don't need a computer to do this, you can just create a timer on the arduino.