A week ago we received the acrylic enclosures for ANAVI Macro Pad 2. We contracted a trusted local company in a near-by town in Bulgaria to make them using laser cutting of 2 mm transparent clear acrylic sheets. There are blue protective films on both sides of each acrylic enclosure which you will need to remove when you receive your ANAVI Macro Pad 2 kit.
The design of the acrylic enclosures has been done with the popular open source software OpenSCAD. It is a simple and lightweight application that runs on MS Windows, MacOS and Linux. I am using it on Ubuntu. OpenSCAD is a script-only based modeller that uses its own description language to create solid 3D CAD objects. The .scad files for ANAVI Macro Pad 2 are available in GitHub. OpenSCAD supports exporting to various different file formats, including svg and pdf.
Having met the stretch goals means all kits will include 32 awesome transparent Emoji stickers. You can put them on any side of the translucent keycaps. It is entirely up to you to decide whether to use the stickers and on which keys to put them. This way you can customize your ANAVI Macro Pad 2 with its own unique look!
These transparent Emoji stickers feature icons from Font Awesome, available under CC BY 4.0 License in GitHub. Thank to our trusted local supplier in Plovdiv, Bulgaria they are printed on a glossy transparent foil and laser-cut in rectangular or square shapes, depending on the icon dimensions and proportions. We already have experience with the same stickers because they are also part of the ANAVI Macro Pad 8 kits.
In addition, ANAVI Macro Pad 2 includes logo stickers for ANAVI Technology and KiCad, the free and open source CAD software we used to design the printed circuit board for ANAVI Macro Pad 2.
Meet ANAVI Macro Pad 2! It is an open source, programmable two-key mechanical keypad with backlighting. Each of the keys on ANAVI Macro Pad 2 can be reprogrammed for use as a macro or even as a dedicated shortcut key, making it perfect for a number of applications across various industries.
ANAVI Macro Pad 2 runs on a Microchip ATtiny85, which is a reliable, low-cost, 8-bit AVR RISC-based microcontroller. It has a gold-plated printed circuit board, Gateron red mechanical switches, 3mm red LEDs and translucent keycaps.
Recently, we added a brand new keymap for ANAVI Macro Pad 8 for Git users. Git is a free and open source distributed version control system started by the famous Linus Torvalds, the creator of Linux kernel. Nowadays, there are many offerings of Git repositories as a service by GitHub, GitLab, Bitbucket, etc.
The Git keymap for ANAVI Macro Pad 8 contains the following shortcuts for Git. On the first row from left to right:
On the second row from left to right:
FN key to switch to the 2nd layout and control lights
How It Works?
From technical point of view for developers this Git keymap demonstrates a couple of interesting features of QMK firmware:
Using SEND_STRING in the Git keymap increases the total firmware size. This is dangerous because Microchip ATmega32U4, the microcontroller on ANAVI Macro Pad 8, may not have enough free space for it. If the firmware exceeds the size limit any attempts to flash it will fail with a similar error message:
The firmware is too large! 28866/28672 (194 bytes over)
If you run in such a use case, the easiest way to reduce the size of QMK firmware in a keymap for ANAVI Macro Pad 8 is to cut some of the default RGB lighting animations and effects. For example, as in the Git keymap, you can create config.h file in the keymap directory that overwrites the main config.h with a reduced number of supported RGB lighting animations and effects:
We have already covered in details how to install QMK firmware and how to flash a keymap from the command line in a previous blog post and in the user’s manual. Here is it in a nutshell for the Git keymap. Connect ANAVI Macro Pad 8 to a computer with USB to microUSB cable follow the steps below:
Execute the following command to compile QMK and the Git keymap for ANAVI Macro Pad 8:
qmk compile -kb anavi/macropad8 -km git
Execute the following command in a terminal to flash the git keymap:
qmk flash -kb anavi/macropad8 -km git
Press the RESET button on ANAVI Macro Pad 8 when asked:
Detecting USB port, reset your controller now.....
Wait until the firmware flashes successfully:
avrdude done. Thank you.
ANAVI Macro Pad 8 is available at our distributors Crowd Supply and Mouser. We are constantly trying to improve this open source project and we are interested in finding more distributors around the world. If you have any questions please do not hesitate to contact us.
In a previous update we shared the exact steps how to assemble ANAVI Macro Pad 8 Developer Kit. Now let’s have a look at the Maker Kit.
The maker kit provides the printed circuit board (PCB) and an addressable LED strip. There are also some nice stickers. Other accessories have to be purchased separately. You can use any mechanical switches compatible with Cherry MX plate footprint and 3mm LEDs.
The assembly of ANAVI Macro Pad 8 Maker Kit requires soldering and advanced skills. The following tools are required:
Optionally: screwdriver, tweezers and a keycap puller
It is also a good idea to stay safe and get a smoke absorber while soldering, for example our open source ANAVI Fume Extractor.
Please have a look at the video and follow the steps below if you have ANAVI Macro Pad 8 Maker Kit.
Solder mechanical switches to the PCB
Any type of mechanical switch compatible with Cherry MX plate footprint is suitable for ANAVI Macro Pad 8. The developer kit comes with Gateron mechanical switches. The maker kit allow you to use different brand and color.
Choosing the most appropriate switch for your needs and taste is a matter of personal preference. There are many different brands and colors. For example, the blue mechanical switches are more noisy which could be sometimes fun but also annoying during daily work. The red switches are fast and not very noisy therefore they are often proffered by gamers.
There are two pins on each mechanical switch that must be soldered to the printed circuit board. That makes 16 pins in total. The position of the each pin is very specific and the switch goes into the PCB. One of the pins is for the signal coming from the Microchip ATmega32U4 microcontroller, the other pin is for ground.
Solder 3mm LED
This step is actually optional depending on the the type of the mechanical switch. Some mechanical switches may not have a hole in the plastic enclosure for a 3mm LED.
Each 3mm LED for through-hole soldering has 2 legs. The longer leg is the positive terminal, also known as anode. The shorter leg is negative and also known as cathode.
The shorter leg that indicates the negative terminal must go into the square hole of the PCB. ANAVI Macro Pad 8 has 8 mechanical switches therefore 8 LEDs are required. If you want you can use different color of the LEDs. You can even mix colors.
Solder WS2812B addressable LED strip to the back of the PCB
Using scissors cut a little bit from both ends of the LED strip to make sure it will stretched when placed on the board. However it is tricky, be careful and make sure enough from the pads are available to make a good contact after soldering them.
It is very important to properly set the direction of the WS2812B LED strip. On the LED strip you will notice small arrows indicating the direction. They should point from the microUSB connector towards the other end of the PCB as shown in the video.
If you have successfully completed these 3 steps your ANAVI Macro Pad 8 should look just like a developer kit having all accessories soldered. Therefore the next steps are the same as for both the developer and the maker kit. Explore them at our previous blog post as well as in the user’s manual.
Thank you for using ANAVI Macro Pad 8 and for supporting this entirely open source project!
Please have a look at the video and follow the steps below to assemble ANAVI Macro Pad 8 Developer kit. Although you can do it with your bare hands, simple tools like a screwdriver, tweezers and a keycap puller might be useful.
ANAVI Macro Pad 8 developer kit comes with 8 Gateron mechanical switches and red leds. If you prefer another type of switches or color of the LEDs, please have a look at the Maker kit which requires soldering but allows to use different Cherry MX compatible switches or even make a hot-swap upgrade.
Step 1: Stickers
The first step optional. Each kit includes a set stickers. Feel free to add them to the translucent keycaps included in ANAVI Macro Pad 8 developer kit. You can do it with your bare hand or eventually with the help of tweezers.
You can place a sticker on the top or on the side of the keycap. If you like retro electronics you may find some similarities in this approach to the famous keyboard of the best selling personal computer of the 20th century Commodore 64.
ANAVI Macro Pad 8 is powered by the popular open source firmware QMK which allows you to create various layouts. You can make a keymap with 2 or more layouts. A sticker on the side of the keycap might be useful as a visual aid to indicate the additional function of the key.
Step 2: Keycaps
Place all keycaps on 8 mechanical switches of ANAVI Macro Pad 8. You can easily do this with your bare hands. It takes just a few seconds.
As you can see in the video a keycap puller might be useful if you make a mistake and want to pull off a keycap and place it on another location.
Step 3: Peel Off Protective Films from the Acrylic Enclosure
Peel off the protective films from both sides of the two laser cut transparent acrylic parts. The removal of the protective films is quite annoying but once you get rid of them, the acrylic enclosure will be crystal clear and fully transparent.
Step 4: Assemble the Acrylic Enclosure
Assemble the acrylic enclosures. In the cardboard box you also will find M3 black plastic screws, nuts and standoffs. Although you can assemble them with your bare hands a screw driver might be handy.
First place 4 of stand-offs with screws to the bottom acrylic part. After that place ANAVI Macro Pad 8 on top of them. The printed circuit board has 4 mounting holes for this purpose.
Add the rest of stand-offs on top of ANAVI Macro Pad 8 to secure the printed circuit board to the bottom part as shown in the video. Place the top acrylic part and fasten it with the 4 M3 nuts. Finally add the silicon protective pads on the screws on the bottom.
Step 5: Mini OLED Display
Step number 5 is optional. The default open source QMK firmware for ANAVI Macro Pad 8 support mini OLED display connected over the communication bus I2C.
By default mini display in yellow-blue 0.96″ I2C OLED. It comes with 4 jumper wires which might be useful for debugging purposes or if you plan to make a custom 3D printed case. However for the default acrylic enclosure the wires are not needed.
Peel off the protected film and place the mini OLED display as shown in the video to ANAVI Macro Pad 8. Pay attention to the labels that indicated the pin connectors of the display. They must match the labels on the keyboard.
Step 6: Turn On ANAVI Macro Pad 8
Gently plug a USB to microUSB cable to connect ANAVI Macro Pad 8 to a personal computer. Please be careful with the microUSB connector because a harsh bending of the USB cable may damage the microUSB connector.
Thanks to the QMK firmware ANAVI Macro Pad 8 will be detected as human interface device and should work out of the box. Furthermore with QMK you have the freedom to fully customize each key.
Please note that a USB to microUSB cable is not included in any of the kits. Reuse a cable from an old electronic device or purchase a cable according to your taste. Make sure that the cable supports both power and data transfer over USB.
Thank you for supporting and using our open source kits. Stay tuned for more updates, including details for soldering ANAVI Macro Pad 8 Maker kit.
Hot-swappable mechanical keyboard allows you to replace switches and LEDs on the go without soldering and without even powering off the keyboard. In this short video tutorial I explain how to make hot-swappable any printed circuit board for a mechanical keyboard with footprints for Cherry MX plate switches. Other brands such as Gateron and Kaihl are compatible with the Cherry MX switches so this solutions is universal.
The video has been created with a maker kit of the open source mechanical keypad ANAVI Macro Pad 8. I have customized it by adding holtite sockets to make it hot-swappable.
Using the tweezers place the holtite sockets into the PCB. The sockets are small so be careful not to lose any of them. Turn on the soldering iron. Heat each socket and gently push it. So we are using a soldering iron but in this case not for soldering. We are just mounting the sockets using its heat.
It looks easier than it is. It took me some time to do it for all switches and LEDs. Each key has 2 holes for the switch and 2 holes for the LED so basically you need 4 sockets with appropriate sizes for each key.
Next step is optional and specific for ANAVI Macro Pad 8. The maker kit includes WS2812B addressable LED strip which should be soldered on the back of side of the keyboard. Please note the arrow that indicates the direction of the LED strip and make sure you are placing it properly as shown in the video.
Cut the legs of the 3mm LEDs to make sure they will fit well in the hot-swappable holtite sockets that we have already mounted.
Assemble the switches, the LEDs and the key caps. Once you are done with steps 1 this is easy because you already have a hot-swappable printed circuit board for your mechanical keyboard.
By default ANAVI Macro Pad 8 is with Gateron red switches, red LEDs and white translucent keycaps. However, in this case with the hot-swappable version I am experimenting primary with blue Cherry MX switches, green LEDs and dark translucent keycaps. I have purchased several different mechanical switches: Gateron Red, Cherry MX blue and Cherry MX brown. Please note that these particular Cherry MX brown switches in the video do not have slots for the 3mm LEDs.
Although in this video I am using the maker kit of ANAVI Macro Pad 8. The same approach with holtite sockets can be applied on any other PCB for mechanical keyboard with footprint for Cherry MX switches.
Have you already ordered our open source mechanical keypad ANAVI Macro Pad 8 from the recent crowdfunding campaign? It is powered by Microchip ATmega32U4: an 8-bit microcontroller with 32K bytes of ISP Flash, USB Controller and I2C. This microcontroller is part of the AVR family of microcontrollers developed since 1996 by Atmel and acquired by Microchip Technology in 2016.
Microchip ATmega32U4 is how ANAVI Macro Pad 8 connects to the USB port of a personal computer, shows graphics and text on the mini OLED display through I2C. Furthermore, this microcontroller has more than enough general-purpose input/output (GPIO) pins for the mechanical switches.
After the launch of the crowdfunding campaign we received a lot of positive feedback about ANAVI Macro Pad 8 and great ideas from the community. Based on the recommendations of several backers a new option has been recently added. Now you can order a maker kit with an extra add-on: Gateron red mechanical switches, translucent keycaps and 3mm red LEDs.
Basically with this optional add-on, you can get the same parts as in the developer kit, but not soldered. In some use cases, having all the parts in one package is a convenient option for advanced users with soldering skills. This way they don’t need to purchase separately the keycaps, the LEDs and the switches. Furthermore, they can still make advanced modifications before using them with ANAVI Macro Pad 8.
As part of the stretch goals that the crowdfunding campaign has already met, all kits of ANAVI Macro Pad 8 will also include 32 transparent Emoji stickers to customize further the keycaps!