X-Git-Url: https://git.armaanb.net/?a=blobdiff_plain;f=README.org;h=7f5498a18c9a7c318a381f0146df56d412fe9e08;hb=55a3da531d4373ac947e530de8523b96231f13b4;hp=22991f6a66b1ee1c76c14b04a2f4727fc9a4c052;hpb=62f0837a66276a4ffc65fe9168f579dcf5e2a354;p=atreides.git diff --git a/README.org b/README.org index 22991f6..7f5498a 100644 --- a/README.org +++ b/README.org @@ -1,106 +1,242 @@ * Atreus Keyboard -The [[http://ergodox.org][Ergodox]] keyboard is an absolutely fantastic design; I use it every -day at my office. However, I like to work away from the office -frequently, and I thought I might try my hand at designing something a -little more portable. The great thing about assembling my Ergodox is -that it taught be there's really nothing magical about it; it's just a -piece of circuitry with a bunch of switches read by a microcontroller -that speaks the USB HID interface. - -The Atreus is meant to be complementary to the Ergodox as something -smaller, cheaper, and more travel-friendly. The case measures 25x11cm -and lacks even a number row, relying heavily upon the fn key. There is -no PCB in this design, requiring [[http://deskthority.net/workshop-f7/brownfox-step-by-step-t6050.html][a manual matrix wiring approach]]. -However, given that there are only 4 rows and 10 columns, this isn't -as daunting as it could be. It also allows for quicker iteration on -design changes since alterations only require cutting a new case. - -I've seen a number of existing DIY 40% keyboard designs, but all of +The Atreus is a mechanical keyboard designed primarily to match the +shape of human hands and to be as portable as possible. The case +measures 26x12cm and lacks even a number row, relying heavily upon the +=fn= key. There is a circuit board for this design, but it's also +possible to [[http://wiki.geekhack.org/index.php?title=Hard-Wiring_How-To][manually wire the matrix]]. + +I've seen a number of existing DIY 40% keyboard designs, but most of them stagger the rows, which I find very annoying now that I've gotten -used to the columnar layout of the Ergodox. In addition, all the +used to the columnar layout of the [[http://ergodox.org][Ergodox]]. In addition, many of the designs I've seen waste a lot of room on the space bar, failing to take into account the fact that the thumb is the strongest and most -versatile of the fingers. This design avoids both these problems. +versatile of the fingers. This design avoids both these problems while +taking a more couch-friendly single-piece approach. + +[[./atreus.jpg]] + +See [[./changelog.md][the changelog]] for the various revisions made to the design since +its initial release. + +** Kits -[[preview.png]] +You can buy [[http://atreus.technomancy.us][Atreus kits]] that have all the parts you need along with +detailed assembly instructions from http://atreus.technomancy.us. If +you'd rather round up all the parts yourself, that's possible too +since the design is completely open source; see the bill of materials +below. ** Layout -Only a handful of punctuation marks (and no digits) available -unshifted, and all the modifiers are on the bottom row. +Only a handful of punctuation marks (and no digits) are available +unshifted, and all the modifiers are on the bottom row: - : q w e r t || y u i o p - : a s d f g || h j k l ; - : z x c v b || n m , . / - : shift tab super ctrl bksp || space alt enter esc fn + : q w e r t || y u i o p + : a s d f g || h j k l ; + : z x c v b || n m , . / + : esc tab super shift bksp ctrl || alt space fn - ' enter -The numbers and most punctuation are on the fn layer: +The numbers and most of the punctuation are on the fn layer with a +numpad-style arrangement under the right hand: - : 1 2 3 4 5 || 6 7 8 9 0 - : ! @ # $ % || ^ & * ( ) - : _ - = + / || ? { } [ ] - : ~ \ || ` pgup pgdn + : ! @ up { } || pgup 7 8 9 * + : # left down right $ || pgdn 4 5 6 + + : [ ] ( ) & || ` 1 2 3 \ + : L2 insert super shift bksp ctrl || alt space fn . 0 = -I type in Dvorak but prefer to do the remapping in software rather than -hardware so I don't have to change layouts when I switch to my -laptop's internal keyboard. +The =L2= key switches it to the function layer, and tapping =L0= here +brings it back to the first layer. + + : insert home ↑ end pgup || ↑ F7 F8 F9 F10 + : del ← ↓ → pgdn || ↓ F4 F5 F6 F11 + : reset || F1 F2 F3 F12 + : super shift bksp ctrl || alt space L0 + +The [[https://atreus.technomancy.us/tmk][firmware]] includes a number of other options, including +colemak, dvorak, and "software dvorak" which sends keycodes assuming +the OS will perform the translation into dvorak. Adding new layouts or +changing existing ones is easy. ** Parts *** Switches -I strongly prefer the feel and sound of tactile [[http://www.digikey.com/product-detail/en/MX1A-E1NW/CH197-ND/20180][Cherry MX blue]] -switches for typing. +This layout has five modifiers and 37 non-modifiers. -However, I like having linear switches on the modifier keys (ctrl, -alt, super, shift, and fn). [[http://www.wasdkeyboards.com/index.php/products/keyboard-parts/cherry-mx-red-keyswitch-mx1a-l1nn-linear.html][Cherry MX red switches]] are nice and light -but are difficult to find. Cherry black switches are cheaper and -easier to source, but may be too heavy, especially for keys under -pinky fingers. +I strongly prefer the feel and sound of tactile [[https://deskthority.net/wiki/Matias_switch#Click][Matias Clicky]] +switches for typing. However, I like having [[https://deskthority.net/wiki/Matias_switch#Linear][Matias Linear +switches]] switches on the modifier keys (ctrl, alt, super, shift, and +fn) because the tactile effect has no benefit for keys that are held +down, and giving a different response helps you learn the layout more +quickly. -This layout has five modifiers and 35 non-modifiers. +For users that need to operate in sound-sensitive environments like +open offices or libraries, +[[http://deskthority.net/wiki/Matias_switch#Quiet_click][Matias Quiet +Click]] switches are a popular choice since they still offer tactility +without the noise. Other users prefer switches in the +[[http://deskthority.net/wiki/Cherry_MX][Cherry MX]] family, which use +different keycaps and switch plates but still work fine. *** Diodes -In order to avoid ghosting, each switch needs a [[http://www.digikey.com/product-detail/en/1N4148TR/1N4148FSTR-ND/458811][diode]]. +In order to avoid ghosting, each switch needs a diode. The [[https://www.radioshack.com/product/index.jsp?productId=2062587][1N4148]] is a +readily-available choice, but nearly any signal diode would work. *** Microcontroller -I'll be using a Teensy 3 since I have one on hand, but an [[https://www.adafruit.com/products/1315][Arduino -Micro]] or [[http://www.pjrc.com/teensy/index.html][Teensy 2]] would work too. +The circuit board design uses a [[http://www.pololu.com/product/3101][Pololu A-star micro]]. Hand-wired boards +can also use a [[http://www.pjrc.com/teensy/index.html][Teensy 2]] or [[http://arduino.cc/en/Main/ArduinoBoardMicro][Arduino Pro Micro]]. + +Be sure to get a microcontroller without headers so it will fit in +between the bottom layer and the plate. USB micro is preferred over +USB mini for this reason as well. *** Keycaps -This [[http://keyshop.pimpmykeyboard.com/product/dsa-pbt-blank-sets][DSA-shaped base set]] has 52 1x keys plus a few extras we won't use. +Caps for Matias switches are included in the official kits. Sculpted +caps are also available [[http://matias.ca/order/#keycaps][from Matias]] or by harvesting from old Alps +keyboards. It's recommended that you use unlabeled keys, because due +to the different sizes and orientations of certain keys (backspace, +shift, enter, etc) many of the labels will be incorrect if present. + +Cherry switches have more options. This +[[http://keyshop.pimpmykeyboard.com/products/full-keysets/dsa-blank-sets-1][DSA-shaped base set]] (spherical indentations on the key, same profile for each +row) from Signature Plastics has 52 1x keys plus a few extras we won't +use. There are two "deep dish" keys in that set which you can place +under your index fingers on the home row to help guide your hands to +the right spot without looking. However, you only get a single 1.5x +keycap, and the middle two thumb keys both use them, so you might want +to pick up an extra. + +** Circuit Board + +The =atreus.rkt= program calculates switch and diode positions based +on row/column counts, spacing, and rotation factors, and emits a +=atreus.kicad_pcb= file. The board outline and traces are done by hand +and are stored in the =header.rktd= and =traces.rktd= files +respectively. The =atreus.kicad_pcb= file can be imported into [[http://kicad-pcb.org][Kicad]] +which can export Gerber files suitable for fabrication. A copy of the +Kicad PCB file is included in the repository if you don't want to +recompile it using Racket. Recompiling is only required if you want to +make changes to the procedurally-generated portions of the board. + +Unfortunately most PCB fabricators require a minimum order of 10 or +so, making this impractical for one-offs. The PCB is not required, so +for one-off boards it's usually more sensible to stick with a [[http://atreus.technomancy.us/assembly-hand-wired.pdf][hand-wired build]] instead. ** Case -Layered laser-cut acrylic; see [[file:case.svg][case.svg]]. 2mm for the bottom layer, 6mm -for the others. +Layered laser-cut wood or acrylic. The [[http://geekhack.org/index.php?topic%3D54759.msg1304117#msg1304117][mark II case]] (EPS files in the +=case/= directory) features 8 screw holes and a kind of "stair step" +design around the top and bottom of the key clusters; mark I is +pictured below. + +The =3mm-alps-all.eps= file contains the top plate, bottom plate, and +switch plate for Matias switches. =3mm.eps= contains the files for +Cherry boards. These pieces can all be cut on 3mm acrylic or wood. The +=spacer.eps= file should be cut on something thicker; between 4.5mm +and 6mm is recommended. The spacer needs to be at least as thick as +the connector of the USB cable you're using. + +There is also a programmatically-implemented version of the case +written in OpenSCAD; it is more flexible (you can tweak the number of +rows/cols, etc and recompile) but it doesn't match the canonical case +exactly; in particular the screw holes are placed differently. + +The original case (=case-mk-i.svg=) design is also included; it is +slightly less wide and has a minor asymmetry with the screws on the +bottom side. + +On a 100W Epilog laser, the 3mm layers cut in about a minute and a +half. I did a run with 6mm acrylic of the other layers which took +nearly 6 minutes. + +Wood cases should be finished with sandpaper and finishing oil/wax or +with [[https://atreus.technomancy.us/lacquer.pdf][lacquer]] which +takes longer but feels nicer. ** Firmware -TODO: Uhhh... +The [[https://atreus.technomancy.us/tmk][TMK firmware]] is +recommended. You should be able to change into the =keyboard/atreus= +directory and run =make KEYMAP=qwerty= (or whichever variant you want) +to produce a qwerty =atreus.hex= file. You will probably want to +create your own layout once you've gotten a chance to try it and see +what works for you. See the readme for instructions of how to upload +it to the keyboard's controller. + +There is also the older [[https://github.com/technomancy/atreus-firmware][atreus-firmware]] custom codebase which works +but has fewer features. It is recommended mostly for learning purposes +since the code is much simpler and easier to understand than TMK. + +** Bill of Materials + +Using Cherry switches is cheapest unless you can find cheap Alps-mount keycaps: + +- 50 MX Blue switches: $29.00 (mechanicalkeyboards.com) +- 50 diodes: $3.45 (radio shack, should be able to buy in-person) +- Base blank DSA keycap set: $23.00 (signatureplastics.com) +- Teensy 2: $16, $3 shipping (pjrc.com) +- Case materials: ~$16, varies by source +- Case laser cutting: 7.5 minutes on a 100W Epilog laser; varies by source +- USB micro cable: $5, various sources + +Recommended but optional: + +- 5 MX Red or MX Black switches: $8.50 - $10.00 +- additional 1.5x DSA keycap: $1 plus $8 shipping + +The base keycap set only has one 1.5x key, which is used for the inner +thumb keys. You can use a 1x key for one of them, but it looks kind of +tacky, so I recommend getting a second 1.5x keycap separately. + +*** Other Tools + +You'll need a soldering iron, solder, and a wire cutter. A multimeter +can come in handy for testing the connections but is optional. You'll +also need eight M3 machine screws with nuts; the length of the screws +depends on the thickness of the acrylic you use. You can add rubber +feet to the bottom to prevent the board from sliding around when +placed on a desk. You'll also need sandpaper and lacquer for the +wooden case. + +If you are building a hand-wired board you will also need a glue gun, +hookup wire, and wire strippers. + +** Assembly + +See the [[https://atreus.technomancy.us/assembly.pdf][assembly instructions]] PDF. + +Hand-wired boards will want the [[https://atreus.technomancy.us/assembly-hand-wired.pdf][previous edition of the assembly instructions]]. + +The LaTeX source to the assembly instructions is in the =assembly= directory. + +** Inspiration + +These fine projects all provided inspiration for various aspects of +the Atreus, as well as the folks on the =#geekhack= freenode channel. + +- [[http://ergodox.org][Ergodox]] +- [[http://deskthority.net/workshop-f7/onehand-20-keyboard-t6617.html][OneHand]] +- [[http://blog.fsck.com/2013/12/better-and-better-keyboards.html][keyboard.io]] +- [[http://geekhack.org/index.php?topic=48718][ErgoT]] + +** Builds -** BOM +If you've built an Atreus, please add your name to [[https://github.com/technomancy/atreus/wiki/BuildLogs][the build logs wiki]]. -- 35 MX Blues @ $1.00 -- 5 MX Reds @ $2.00 -- 40 diodes @ $0.052 -- Base keycap set: $18.00 -- Teensy 2: $16 +There's also a [[https://atreus.technomancy.us/list][mailing list]] for people who have built or ordered an +Atreus or are interested in doing so. -=(+ 35 10 (* 40 0.052) 18 16)= -> $81.08 plus shipping and acrylic +** Orestes -- Digikey (blues and diodes) shipping: $5.32 in the US -- WASD (red switches) shipping: ?? -- Signature Plastics (keycaps) shipping: ?? -- Acrylic materials: ?? -- Acrylic laser cutting: ?? +A new [[https://www.flickr.com/photos/technomancy/14654421878][experimental build]] uses the [[http://pjrc.com/store/teensy31.html][Teensy 3]] microcontroller and +ARM [[https://github.com/technomancy/orestes/tree/teensy3][Forth-based]] firmware, but this is not yet suitable for general-purpose use. ** License -Copyright © 2014 Phil Hagelberg +Copyright © 2014-2016 Phil Hagelberg and contributors Released under the [[https://www.gnu.org/licenses/gpl.html][GNU GPL version 3]]