View source for DIY Ninjas Section

==CM1 support (how to change power mode)==

[[File:Cm1-cm3-vbat-power.png|none|300px|CM1 and CM3 VBAT power]]


Compute Module 1 needs 5V VBAT power for kernel, and CM3/CM3+ needs 3.3V VBAT.

By default StereoPi tuned to provide 5V voltage for CM3 series support.

To change powering for CM1 you need:
# Unsolder R15 (0 Ohm) resistor here:

[[File:R15-stereopi-bottom.jpg|none|300px|R15 resistor StereoPi]]

# Solder R17 (0 Ohm) resistor or piece of wire here:

[[File:R17-stereopi-top.jpg|none|300px|R17 resistor StereoPi]]

==Undeclared feature: usb client mode==
[[File:Usb-switch.png|none|300px|StereoPi usb switch]]

You can easily access CM's USB on MicroUSB connector. You need to unplug power cable, and connect StereoPi's MicroUSB cable to computer without installing <code>USB SLAVE</code> jumper. In this case DD4 USB switch will connect CM's USB pins directly to MicroUSB connector. Onboard USB and LAN will be disabled, and you can use [http://www.linux-usb.org/gadget/ usb-gadget] API to turn on RNDIS LAN, usb camera or other modes on StereoPi according to your aim.

If you connect StereoPi by MicroUSB cable to your computer AND install <code>USB SLAVE</code> jumper, you will turn on firmware upload mode. Start [https://www.raspberrypi.org/documentation/hardware/computemodule/cm-emmc-flashing.md rpiboot.exe] to make eMMC visible as external drive.

==Device tree (DTS and dt-blob.bin)==

===Ready to use dt-blob.bin file:===

[http://wiki.stereopi.com/files/dt-blob.bin.zip Download mirror 1] (Wiki hosting)

[http://stereopi.com/sites/default/files/dt-blob.bin.zip Download mirror 2] (website hosting)

===DTS source file===

[http://wiki.stereopi.com/files/dt-blob.dts.zip Download mirror 1] (Wiki hosting)

[http://stereopi.com/sites/default/files/dt-blob.dts.zip Download mirror 2] (website hosting)

==Schematic of the StereoPi board==
We plan to publish all schematic right after sending boards to bakers.

Original StereoPi schematic was created in Altium, and now we're trying to choose appropriate open source tool.  At this moment we like [http://kicad-pcb.org KiCad]. If you have some ideas which tool should we use for opening our schematic, please let us know in out twitter here:

https://twitter.com/StereoPi