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audio-pro-xlr5-mini.yaml
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audio-pro-xlr5-mini.yaml
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---
name: 5 Pin Mini XLR
summary: Consumer audio device support.
description: >
While bluetooth audio capabilities are present in many vehicles, they are
often for voice communication or standard-quality music playback. There are
better ways to pipe audio into older car stereos. This connector is an
excellent choice for automotive audio modules which may need a recharge.
You may notice there are no analog contacts on this connector. Instead,
S/PDIF can be used for audio transmission. Take special care to keep CAN
signals isolated from S/PDIF signals. S/PDIF is best transmitted via coaxial
cable & is not the most resilient of signals.
Modern smartphones do not feature CAN, S/PDIF, nor can they tolerate 20VDC.
With a relatively small enclosure, though, the power on the twenty-volts-max
contact can be regulated to five volts (or be piped into a
`qualcomm-quick-charge-adapter`). The analog audio can be converted to S/PDIF
with a audio ADC chip. What about CAN? Well most smart devices can have basic
media control via certain resistances on the mic contact.
Add a microcontroller into your enclosure & have it convert serve up this
method of control to the CAN bus. Another microcontroller can be in-dash,
communicating with the microcontroller in the cable. Behind the car stereo,
convert that S/PDIF signal back to analog (most car stereos lack S/PDIF).
If you want to have even more fun with stereos that boast old-school iPod
control, connect the in-dash microcontroller to the stereo's iPod interface
(see `apple-30-pin`, or `alpine-m-bus`).
Now you can charge & control any modern smartphone via an elegant cable
solution & your old car stereo. Add more excellence, if you wish, via an
`ioio-otg` board.
Finally, take a look at the connector. Do you think it can support the weight
of a 3D printed dock? No? What about if the panel-mount connector faces
skyward? Happy hacking...
reference:
- http://www.androidcentral.com/quick-charge
contacts:
1: spdif
2: controller-area-network-low
3: controller-area-network-high
4: common
5: twenty-volts-max