a cyberdeck for dealing in noise
- btrfld keyboard
- trackpad
- headphone jack
- mic jack
- 1x usb c data port
- 1x usb c charge port
- 1x usb a port
- ipad: magnetically mounted
- ipad pencil and charging cradle
- rpi zero 2 w + 5000mah battery
future:
- extra keys in topcase for common hotkeys(?)
- choc key one octave keyboard in topcase(?)
- pitch joystick/wheel that snaps back to the center
the rpi zero 2 w is ran so its usb is in gadget mode, so it tells the ipad it is an ethernet device. with this you can setup a local network and ssh directly from the ipad to the rpi without using wifi this leaves the wifi chipset useful for other things
btrfld:
- 129mm deep
- 215mm wide
hinges: https://www.amazon.com/gp/product/B0BFWNJMCY/
hinge fasteners: M3x8 countersunk fasteners: https://www.amazon.com/HanTof-Countersunk-Machine-Wrenches-Threaded/dp/B0B9HWVV61 M3x10 countersunk fasteners M3 threaded, DIN 562 flat square nuts: https://www.amazon.com/M3nS-Printers-Stainless-Conform-Quantity/dp/B0BD2N9KTV
power switches: https://www.amazon.com/dp/B075RC6TFB
apple pencil charging cradle: https://www.amazon.com/Paiholy-Compatible-Generation-Lightweight-Convenient/dp/B0BMB7362T
midcase fasteners (plastic to plastic): m2x5 and m2x6 tapered flat head self taping screws
cheap ipad magnetic folio case
btrfld keyboard: https://github.com/SolidHal/btrfld
usbc to 3x usbc (2 data, one power): https://www.amazon.com/gp/product/B09PFR2J82
usbc to 4x usbA : https://www.amazon.com/dp/B09N36LZSQ
usbA dac: https://www.amazon.com/dp/B01DLY3IW8
usbc right angle extension: https://www.amazon.com/dp/B0B71BZ4YF
rpi zero 2 w
5000mah battery
pcb usb hub https://www.amazon.com/dp/B09FX4QN4J
used to get a power only usbc port for charging the rpi battery: https://www.amazon.com/dp/B07VBV1PY5
dac must have a power switch, otherwise the ipad will always use it by default and never allow usage of the speakers
TODO:
-
holes in midcase/topcase and lid for latch(?)
-
extra keys in topcase for common hotkeys(?)
-
choc key one octave keyboard in topcase(?)
case:
-
use 52 gauge drill bit to clean out midcase holes for the m2 screws
-
use 46 gauge drill bit to clean out topcase holes for the m2 screws
-
use chamfer bit on bottomcase holes screws sit flush
-
glue eyeglass nosepads to bottomcase for feet
-
hinges need to be filed/ground shorter on the side that would otherwise stick out through the bottom case
-
cleaning out the hinge holes in the ipad enclosure is annoying. Recommend using a 46 gauge drill bit
-
tear down the ipad folio case to just the parts required to hold the magnets in place. lets call this the "case core"
- attach a thin film to the side of the case core that magnetizes to the ipad
- superglue the case core into the ipad enclosure so that the ipad is held into the ipad enclosure magnetically
-
the 5000mah battery pack fits nicely under the dac.
wiring:
The wiring is a bit messy, but it works and all fits with plenty of space:
ipad -> extension -> usbc/usbc 3 way splitter -> one usbc charging port, one usbc data port, and the usbc to usbA splitter
usbA splitter:
- port 1:
- data and ground to headphone port dac
- power to two switches on the left side of the noisedeck. One switch to the dac, other to pencil charger. Only use one of these at a time.
- port 2:
- data only to rpi zero 2w data port. Power to nowhere
- port 3:
- to pcb usb hub:
- port 3a:
- to btrfld
- port 3b:
- to trackpad
- port 3a:
- to pcb usb hub:
- port 4:
- glued into the left side of the noisedeck, externally accessible usbA port
the 3d printed case is good, but the ipad on its own is a lousy computer. i want it around for logic pro and drawing, but otherwise i want it to be a linux machine.
options i have explored are:
-
remove the ipad, take a macbook screen & logic board and design a noisedeck around them.
- this gets me a "real" computer, but is quite difficult to pull off
- the hardest part is always
- no more ipad, which means it can't be used for drawing/reading/tablet things
- this gets me a "real" computer, but is quite difficult to pull off
-
use the ipad as a remote desktop/vnc display for some SBC
- battery management is annoying, would have to manage the SBC and ipad battery levels
- rootfs encryption gets funny when a vnc server is required to get display
- could work around this with ssh decryption, or even stick a light vnc server in the initramfs?
- or just do it by feel & have ssh available for debug?
- user login also gets funny, but i could also either do this by feel/ssh for debug or just auto start sway
- create a headless display in the sway config with the ipad res, run
swaymsg create_output - run wayvnc like
wayvnc 0.0.0.0 --render-cursor --disable-input --max-fps=60 --output=HEADLESS-1 - use manual local ethernet connection between the two
-
use the ipad as a display via an HDMI capture card!
- use something like orion (by lux) (other options available)
- this limits the ipad to be just a display, uses standard display tech! no special software on the SBC required
- need to be aware of input lag (hopefully minimal?)
- bevel the edges of the lower topcase so it presses into the wrist less?
- could rotate or move trackpad to get more room to bevel?
- need some way to get 12v for the board
- actually supports 9V~24V wide voltage input!
- not a lot of room in the palmrest for a battery
- could fit 1x 18650?
- need something like https://www.aliexpress.us/item/3256810401027521.html
- https://www.amazon.de/-/en/Kuulaa-Powerbank-External-Battery-Compact/dp/B0GC6J7VTJ does 12v allegedly
- could have an expanded battery pack on the back behind the hinge?
- 3x 18650s?
- adafruit has https://www.adafruit.com/product/5450 which is a usbc pd to 12v dc barel jack
PLAN:
-
3x 18650s - ordered
-
need a 3s BMS
-
need a way to get 12v to the BMS
-
want to be able to plug any usbc charger in, and be able to charge quickly
-
so we need a bidirectional buck/boost usbc that outputs 12v
- full keywords: bidirectional usbc 3s
- IP2368 https://old.reddit.com/r/18650masterrace/comments/1euw3zc/ip2368_breakout_board_external_power_output_not/
- IP5389
-
so the schematic is cells --> BMS <----> ip2368 | controller
-
TODO can we fit an IP2368 board in the palmrest?
-
could use something like this
- https://www.aliexpress.us/item/3256805900941544.html?gatewayAdapt=glo2usa4itemAdapt#nav-specification
- but it only does boost, no buck
- aparently this doesnt work correctly
-
battery case
- chamfers
- case screw holes
- hinge holes TODO: order longer screws!
- bottom case
- where to run battery wires?
- could maybe run them through the midcase wall/bottom in a trench depending on the width?
- could run them over the btrfld with a connector so the btrfld is removable?
- near the btrfld hinge perhaps?
- need to stick a connector either in the battery pack, or in the noisedeck palmrest so we can remove the btrfld
- ~35mm in
- 4.75 from bottom
- 10.2 wide 5.8 tall
- need to stick a connector either in the battery pack, or in the noisedeck palmrest so we can remove the btrfld
- the wires are ~3mm diameter
- the connectors are 5.2x10.2 mm
- near the btrfld hinge perhaps?
- long, thin cooler that spans most of the width of the case?
- fan
- tip for fan control Joshua-Riek/ubuntu-rockchip#558
- these 2 are nearly identical
- TODO: add slots to topcase lower to feed the blower fan
- heatsink options
- if it doesn't go over the pencil charging area: max size is 6.87 tall, 53mm wide, ~160mm long (variable)
- https://www.digikey.de/en/products/detail/fischer-elektronik/SK-511-100-SA/25830853 6mm tall, 100mm long, 45 mm wide
- if it does (we could thin out the bottom of the pencil charger): 6.87 tall, 67mm tall, ~160mm long
- if it doesn't go over the pencil charging area: max size is 6.87 tall, 53mm wide, ~160mm long (variable)
- fan
- order screws, m3x5mm for cooler, m2 for fan