So I was just telling my son, Kasper that the psu we installed in his box had 3 different voltages that he could use: 3V, 5V, 12V, but I wasn’t sure which color is which. The following schematic should help with that.
As we can see the green wire (fourth from top-right) is the one that we shorted with the “common” (negative) for an always on power supply.
- Black = “Common” = 0V = GND
- Orange = 3.3V
- Red = 5V
- Yellow = 12V
I guess that technically the “common” is not “negative”, it’s 0V, or “ground”. Funny how difficult it has been for the scientific to educate people about electricity and popularize coherent terminology for polarity and voltage. Once when a teacher of mine was asked by another student how voltage works, the teacher replied “voltage is like love. It’s both there and it’s not there. It’s real, and it’s not real”.
I wonder if one could run a regular 12V device by connecting 0V to the positive terminal and -12V to the negative terminal. The potential difference would be the same and flow of electrons in the correct direction. Hmmmm… Well, I probably will need to experiment with that on something one day.
The stereo we ended up picking up is a used Pioneer, model: DEH-S1100UB
The speakers are Alpine… I probably should have taken note of their ratings. Quite small, whatever they are. The other ones I saw were actually much too big for the car stereo.
We also got a small Alpine 3540 amp that may or may not get installed some time soon.
I’ll probably update this post late with some useful links to manuals and stuff, but too little documentation is better than no documentation
I should emphasize that Kasper has done the lions share of the work on the box. It’s been a great learning opportunity for the both of us.
keep documenting 