Vehicle Head Unit - Revision history

Karlexceed: /* Research */

2020-07-12T23:03:33Z

Research

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 * Ground
 ** Black
 =Phase 1 - Proof of Concept=

Karlexceed: /* General Information */

2020-07-12T22:58:31Z

General Information

← Older revision		Revision as of 16:58, 12 July 2020
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	* Current wise, the stereo probably had its own fuse and you can find the value of the fuse either in the owner's manual or by looking at the fuse itself.		* Current wise, the stereo probably had its own fuse and you can find the value of the fuse either in the owner's manual or by looking at the fuse itself.
	** It's likely 5-15 Amps.		** It's likely 5-15 Amps.
			* Connectors for car audio are defined in ISO 10487.

	===Stereo Wiring Harness===		===Stereo Wiring Harness===

Karlexceed: /* Stereo Wiring Harness */

2020-07-12T22:58:17Z

Stereo Wiring Harness

← Older revision		Revision as of 16:58, 12 July 2020
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	===Stereo Wiring Harness===		===Stereo Wiring Harness===
	Information comes from [https://www.the12volt.com/caraudio/headunitharness.asp the12volt.com].		Information comes from [https://www.the12volt.com/caraudio/headunitharness.asp the12volt.com]. [https://en.wikipedia.org/wiki/Connectors_for_car_audio Wikipedia] also has a great page with information.
	* Memory / Constant 12V(+)		* Memory / Constant 12V(+)
	** Yellow		** Yellow

Karlexceed: Created page with "The goal of this project is to eventually create a vehicle media receiver / head unit that can replace a traditional stereo unit. It starts with a simplified proof-of-concept..."

2020-07-12T22:53:00Z

Created page with "The goal of this project is to eventually create a vehicle media receiver / head unit that can replace a traditional stereo unit. It starts with a simplified proof-of-concept..."

New page

The goal of this project is to eventually create a vehicle media receiver / head unit that can replace a traditional stereo unit. It starts with a simplified proof-of-concept and is designed to build on previous work with each new iteration.

=Research=
==Typical Car Stereo Wiring==
===General Information===
* Cars are generally standardized with an electrical system voltage that will be in the range of 12 to 14 V DC depending on the whether or not the engine is running.
* Current wise, the stereo probably had its own fuse and you can find the value of the fuse either in the owner's manual or by looking at the fuse itself.
** It's likely 5-15 Amps.

===Stereo Wiring Harness===
Information comes from [https://www.the12volt.com/caraudio/headunitharness.asp the12volt.com].
* Memory / Constant 12V(+)
** Yellow
** Turning the car's ignition on and off as well as turning the headlights on and off should not change the voltage on this wire.
* Switch / Accessory
** Red
** Only provides 12V when the car's ignition is set the On or Accessory mode.
* Ground
** Black

=Phase 1 - Proof of Concept=
This is (almost) the simplest possible replacement for a head unit. It's basically a stereo delete with a few extra features.

==Features==
* Indicator LEDs
** Battery Present
** Power On
* A USB charging port

==Requirements==
* Connection to three wires
** Constant +12V (Yellow)
** On/Acc (Red)
** Ground (Black)
* A voltage converter
* LEDs and other components
* Faceplate, case, mounting...