Monday, December 11, 2017
Thursday, December 7, 2017
Black Pro Micro from AliexpressFound these for sale on Aliexpress. Several sellers have them. They are also usually cheaper than the usual blue Pro Micros.
Other than having black soldermask, these are unusual as they use the larger ATmega32u4 package. It's the same chip as on the regular Pro Micro (44QFN), but in a larger form factor (44TQFP). They had to move the other components around to fit the larger chip.
The larger chip could make it easier to solder wires directly to the pins to make use of some of the extra io.
The power circuit seems to be identical to the blue Pro Micro's. It does not suffer from the problem the green Pro Micro does, and works fine in split keyboards.
Top view. The chip barely fits on the board. This one has a green power LED and red TX/RX LEDs.
Bottom view. No components. I have not seen any 3.3v ones for sale. Only 5v, 16Mhz ones.
This is how it was packaged. It came with two 12pin headers.
Side by side with the usual blue Pro Micro clone.
Two installed in a foobar.
Tuesday, December 5, 2017
$5 PCB order from AllPCBAllPCB is currently having a promotion for ten 100mm x 100mm PCBs for $5 shipped.
I ordered some of my 5x5 macropad PCBs. The ordering process is much different than EasyEDA. There is no online preview. It just asks for the size of the board. You have options for different finishes and soldermask colors. There is an actual human that then reviews your design and either accepts it or rejects it. They can either reject it as not producible (errors in design) or add additional charges if you are exceeding the design limits for the base price.
The order arrived via DHL. They are definitely losing money doing these orders.
Monday, December 4, 2017
Gherkin Of The Week #9Another Frankenstein 30% Edward Gherkin. Uses the same aluminum plate as this one. This might actually make a good controller for something.
2U POS keycaps from PMK grab bag. These all have double shot defects.
M2 Spacers and screws.
The aluminum is bare 5052 alloy. Very strong, but scratches easily.
The handles provide some protection for the key caps. Sort of like roll bars.
Keycaps are a mix of DSA and DCS profile.
Wednesday, November 29, 2017
Monday, November 27, 2017
First try at a BLE GherkinThe PCB has several routing problems and so the matrix does not work without a lot of cutting and jumpering.
Will be working on a revised board. Probably remove the reset button since the Adafruit Feather BLE already has one. Will look at adding the connector for the battery on the PCB so that a power switch can be added to disconnect it from the Feather when not in use. I will probably remove the LEDs too, probably just add a few status LEDs instead of a full backlight.
The LIPO connector is very large on the Feather. Much larger spacers ~14-16mm will be needed even with low profile sockets.
Wednesday, November 22, 2017
60% Keyboard with Wood plateI assembled this from parts I had lying around. It has an older version of the Winkeyless b.face PCB and a cheap plastic case from Aliexpress. The plate is 1/16 inch birch plywood laser cut from a design from http://builder.swillkb.com. Costar stabilizers clipped into the plywood.
The layout has the maximum number of keys you can have on a b.face. Split backspace and short left and right shifts, give you 3 extra keys over the standard ANSI layout.
Keycaps are DSA from a PMK grab bag. Switches are Kailh Copper tactile.
With the wood plate, this is a very light keyboard.
Monday, November 20, 2017
Gherkin Of The Week #8Gherkin with perforated aluminum bottom. Same bottom as this one. I had a lot of the same keys in one of my grab bags. They must have made way too many number row keys. They don't look defective at all.
If you Google 0909090909 you actually get quite a few hits.
SA Row 3 profile. These are grab bag keys from the 1976 keyset.
These M2 spacers were really cheap. Something like 500 for $6. They are very poor quality. Some have bad or missing threads. They are really meant to be press fit into plastic holes, where the inconsistencies of length would not matter.
5052 aluminum plate with punched and drilled holes.
Wednesday, November 15, 2017
Some links to Gherkin related infoSome links I found via Google.
Gherkin build loghttps://mechkeys.tech/2017/09/gherkin-build-log/
Building a 30 key keyboardhttps://hackerific.net/2017/10/08/building-a-30-key-keyboard/
頑張ってGherkin 30 key Keyboardを作るぞ！【材料集め編】http://romly.com/archives/2017/10/gherkin_gather_materials.html
Finalized Gherkin Buildhttps://www.ifunnybox.com/show/321206177
Black Gherkin Build Loghttps://www.reddit.com/r/MechanicalKeyboards/comments/6a2b4b/black_gherkin_build_log/
BUILD LOG: Anti-climatically Sad Gherkinhttps://www.reddit.com/r/MechanicalKeyboards/comments/6u9gos/photos_build_log_anticlimatically_sad_gherkin/
Livestream - The Board Podcast LIVE! -Attempting to build a Gherkinhttps://www.youtube.com/watch?v=INw0XjMiGX0
Gherkin Firmware Flashinghttps://www.youtube.com/watch?v=HDdCJEmXtf8
Gherkin 30% keyboardhttp://adventurist.me/posts/0287