The ANAVI Macro Pad 12 and ANAVI Arrows have received official certification from the Open Source Hardware Association (OSHWA). OSHWA, a non-profit organization based in the United States, manages the Certified Projects Directory and hosts the annual Open Hardware Summit. Notably, the summit takes place in different cities, and in 2024, it is scheduled to be held in Montreal, Canada.
The printed circuit boards of ANAVI Macro Pad 12 and ANAVI Arrows were designed the open source software KiCad
The certification program by OSHWA ensures that a project’s understanding of “open source hardware” is in harmony with the wider community’s definition of open source hardware. Subsequently, OSHWA assigns a unique identification number (UID) to every certified hardware version. This UID commonly comprises a blend of a country code and a numerical sequence, ensuring that each certified hardware version possesses a distinct identifier. For our two new keyboards, the UIDs are:
The OSHW Certification Mark serves a dual role: not only does it display the project’s unique certification ID, but it also streamlines navigation and information retrieval. In this context, the “BG” prefix signifies the country code for Bulgaria, indicating that these mechanical keyboards are crafted in Plovdiv, the second-largest city in Bulgaria and the oldest continually inhabited European city with over 6000 years of history. What sets our keyboards apart is their complete adherence to open-source principles. This means that every facet of their design and functionality is open and freely accessible to everyone. Our dedication to openness extends to utilizing only free and open source software in various project aspects, including designing the printed circuit board, creating acrylic enclosures, developing firmware, and thoroughly documenting the entire process.
The printed circuit boards for ANAVI Arrows and ANAVI Macro Pad 12 were designed with the open source software KiCad on Ubuntu Linux distribution. Furthermore, we use open source firmware called KMK, written in CircuitPython. Soon QMK firmware will be also ported to both keyboards. Open source ensures transparency, sharing knowledge and hopefully fostering collaboration and innovation within the community.
ANAVI Arrows and ANAVI Macro Pad 12 mechanical keyboards with how-swappable switches
Every kit features environmentally conscious simple packaging encased in recyclable cardboard boxes. These boxes are made from recycled materials and are readily recyclable once more, fostering a circular economy. Opting for this kind of packaging is in harmony with our sustainability objectives and a dedication to a more environmentally-friendly and conscientious approach to packaging materials.
Mechanical keyboard kits in eco-friendly packaging from recycle cardboard boxes
We want to express our profound gratitude for all backers of our open-source hardware offerings! If you missed the crowdfunding period you can still purchase a compact mechanical keyboard from Crowd Supply. In the coming months we will make ANAVI Arrows and ANAVI Macro Pad 12 available through our other distributors. Anticipate a consistent flow of technical enhancements. We trust that your new equipment will bring you both enjoyment and a boost in your productivity!
After our crowdfunding campaign concluded successfully, we immediately started the manufacturing phase without delay. Thankfully, we had the foresight to ensure we had all the necessary components in stock ahead of time. Just recently, we happily received the first batch of ANAVI Arrows and Macro Pad 12 printed circuit boards, which are adorned with surface mount components on both sides.
ANAVI Arrows and ANAVI Macro Pad 12
We are already in the process of locally producing our second batch, and we expect it to be ready by the end of September. These printed circuit boards are meticulously gold-plated to guarantee the highest quality.
XIAO module with Raspberry Pi RP2040 assembled on the mini mechanical keyboard ANAVI Arrows
Additionally, the acrylic enclosures were laser cutted in August. Our next steps include programming CircuitPython and the KMK firmware, testing, and packaging all keyboards.
Once again,thank you for your support of ANAVI Macro Pad 12 and ANAVI Arrows. Stay tuned for more exciting updates in the coming weeks!
I2C (Inter-Integrated Circuit) is a popular serial communication protocol that allows multiple integrated circuits to communicate with each other over a short distance, typically limited to a few meters. Each device on the bus has a unique address, identifying it and allowing it to communicate individually. The protocol was developed by Philips (now NXP Semiconductors) in the 1980s. Over the years it has become a standard for communication between various electronic components in embedded devices. I2C can be used to connect various peripherals, such as sensors, displays and EEPROMs. The mini OLED yellw-blue displays on our compact mechanical keyboards ANAVI Macro Pad 12 and ANAVI Arrows are connected to the Raspberry Pi RP2040 microcontrollers over I2C.
ANAVI Arrows and ANAVI Macro Pad 12 are open source mechanical keyboards with mini OLED I2C displays
I2C is easy to use becase it requires only two wires for communication:
SDA (Serial Data) for transmitting and receiving data between devices
SCL (Serial Clock) for a clock signal to synchronizes the data transfer between the devices
The core component of our hot-swappable mechanical keyboards ANAVI Macro Pad 12 and ANAVI Arrows is Seeed Studio XIAO RP2040 module. This is actually a tiny development board suitable for surface-mount technology (SMT) assembly and equipped with a Raspberry Pi RP2040 32-bit dual-core ARM Cortex M0+ MCU, 264 KB SRAM, 2 MB Flash memory, 11 GPIO pins and USB-C connector. The I2C interface is located on pins D4 (for SDA) and D5 (for SCL) of XIAO RP2040.
Seeed Studio XIAO RP2040 module on ANAVI Macro Pad 12 mechanical keyboard
A yellow-blue mini OLED I2C display is included in all kits with ANAVI Macro Pad 12 and ANAVI Arrows. It has 4 pins: GND (ground), VCC (supply voltage), SCL, and SDA. This display relies on SSD1306, a single-chip CMOS OLED/PLED driver with controller for organic / polymer light emitting diode dot-matrix graphic display system which consists of 128 segments and 64 commons. It is the same display we include in our other mechanical keyboards like the ANAVI Macro Pad 10 and ANAVI Macro Pad 8, Internet of Things devices like the ANAVI Thermometer and ANAVI Gas Detector, tools like ANAVI Fume Extractor, and Raspberry Pi add-on boards like ANAVI Info uHAT. This versatile mini OLED display is a great fit for many projects, You can pick one up at Mouser if you need a spare.
Mini yellow-blue 0.96″ OLED display attached to ANAVI Macro Pad 12 with QMK firmware for mechanical keyboards
There is a dedicated slot for the display on the printed circuit board. Just plug the mini OLED display into it and then connect the mechanical keyboard to a computer. In every kit with ANAVI Macro Pad 12 and ANAVI Arrows, you will find four additional male-to-female jumper wires included, providing you with an exciting opportunity to get creative with your project. If you decide to design your own 3D printed case for the keyboard, these jumper wires may become handy. They grant you the flexibility to reposition the mini OLED display to a location of your choice within the case.
ANAVI Macro Pad 12 is compatible the two most popular open source firmwares for mechanical keyboards: KMK and QMK. KMK is written in CircuitPython and QMK in the C programming language. Both support OLED displays over I2C.
Out of the box ANAVI Macro Pad 12 and ANAVI Arrows come with the KMK firmware. It uses the extension Peg Oled Display based on the open source CircuitPython libraries Adafruit_CircuitPython_DisplayIO_SSD1306 and Adafruit_CircuitPython_Display_Text. This extension allows your keyboard to display images or text and even to react to the currently selected keyboard layer.
ANAVI Macro Pad 12 with a breadboard and additional I2C peripherals
Makers with advanced skills have a fantastic opportunity to extend the capabilities of the keyboard project by adding more I2C peripherals. Using a breadboard and without any soldering, makers can easily connect additional I2C peripherals, such as sensors or other modules that communicate via I2C, to the existing setup. This allows them to expand the project’s functionalities and explore various creative ideas. Those seeking a more permanent and tailored extension can even design their own custom I2C add-on printed circuit board. The mini OLED displays included in the kits work out of the box, but it is important to be aware that incorporating any other I2C devices into the keyboard will require adjusting the KMK firmware to support the additions.
Support our crowdfunding campaign and get the open source mechanical keyboards ANAVI Macro Pad 12 and ANAVI Arrows with a mini OLED display for real-time notifications and customizable graphics at your fingertips. Learn how to use I2C and unleash your creativity by extending the keyboard with additional peripherals!
Within the realm of computer keyboards, a remarkable open-source firmware called KMK has surfaced, captivating enthusiasts from all corners. KMK possesses a potent capability to revolutionize mechanical keyboards into personalized instruments, enabling users to venture into uncharted territories of customization and productivity.
KMK Open Source Mechanical Keyboard Firmware Written in CircuitPython
CircuitPython is an open-source programming language that runs on microcontrollers used in various embedded applications, including mechanical keyboards like ANAVI Macro Pad 12 and ANAVI Arrows from our crowdfunding campaign at Crowd Supply. Built upon the foundations of Python, CircuitPython is specifically crafted to cater to the requirements of resource-limited embedded devices housing microcontrollers. One of the standout merits of CircuitPython lies in its user-friendly nature and effortless adaptability, particularly beneficial for newcomers who may not possess extensive coding expertise.
ANAVI Arrows and ANAVI Macro Pad 12 with the open source firmware KMK written in CircuitPython
The source code of KMK is readily available on GitHub, released under the GPLv3 license. The inception of KMK can be traced back to 2018. Notably, the KMK source code follows a coding style that employs the Python code formatter, known as Black, and embraces the usage of single quotes.
KMK firmware runs on Raspberry Pi RP2040 microcontoller which is in the core of Seeed Studio XIAO RP2040 module
The hardware requirements for microcontrollers to run KMK are: a minimum of 256KB of flash storage, support HID over USB and/or Bluetooth, CircuitPython version 7.0 or newer. With its impressive hardware capabilities, the Raspberry Pi RP2040 microcontroller is a perfect fit for CircuitPython and KMK. Because of this we selected Seeed Studio’s XIAO module with RP2040 for ANAVI Macro Pad 12 and ANAVI Arrows.
KMK offers many key features:
Key Mapping: Customize key assignments to suit individual preferences
Macros: Create and assign macros for automating tasks or executing commands
Layers: Define multiple virtual layers for accessing different functions or modes
LED Control: Customize backlighting and LED behavior
Rotary Encoder: Rotary encoders for various functions like volume control or scrolling.
Mini OLED Display: Compatibility with mini OLED displays, allowing users to display custom information or visuals on their keyboards
Back-light and under-light effects with KMK firmware on the mechanical keyboards ANAVI Macro Pad 12 and ANAVI Arrows
A standout feature of the ANAVI Macro Pad 12 and ANAVI Arrows is their seamless switch swapping capability, allowing you to tailor your typing experience on the go! With utmost ease and no need for soldering, thanks to the convenient hot-swappable sockets integrated into the printed circuit board, anyone can effortlessly remove a switch from its socket and replace it with another compatible switch.
This revolutionary feature provides several benefits to keyboard enthusiasts and users who like to customize their typing experience. It allows for easy experimentation with different switch types, enabling users to find the switch that suits their preferences best. It also simplifies switch replacement, making it more convenient to replace a faulty switch or try out different switches without needing specialized soldering equipment or skills.
Basically the whole key is like a sandwich: hot-swappable socket, mechanical switch and a keycap. All kits with ANAVI Macro Pad 12 and ANAVI Arrows include Gateron red mechanical switches. However thanks to the hot-swappable sockets you can experiment with various options of clicky, tactile and linear Cherry MX compatible mechanical switches from different brands with various tech specs and colors: red, blue, brown, green, silver, etc.
The printed circuit boards of ANAVI Macro Pad 12 and ANAVI Arrows are designed with Kailh hot-swap sockets on the back. These sockets are for surface-mount technology (SMT) assembly. To provide backlight on the front of the printed circuit boards there is a separate LED under each mechanical switch. We decided to make both of these keyboards with north-facing switches, aka the LED on each key is on the top (north) part of the switch. Furthermore, there are WS2812B addressable LEDs on the back. All these LEDs combined with the translucent keycaps included in the kit create awesome light effects when the keyboard is turned on. The open source firmware KMK allows fine tuning of the lights.
Although, as you can see in the video it is possible to hand-solder the sockets, this is appropriate only for a prototype. For manufacturing the keyboards ordered from the crowdfunding campaign we have hired a trusted local factory and they will do a professional lead-free assembly of all components. Using these hot-swappable sockets and SMT LEDs there is no need of manual hand soldering of any mechanical switches. This significantly simplifies and speeds up the manufacturing process. The end result is better quality and lower price.
Our crowdfunding campaign has a very modest goal of just $1. It will help us make the keyboards in my hometown Plovdiv, Bulgaria, EU thanks to the trusted supply chain we have established throughout the years. Order ANAVI Macro Pad 12 or ANAVI Arrows to get a cool mechanical keyboard and help us bring these entirely open source hardware projects to life!
Both ANAVI Macro Pad 12 and ANAVI Arrows feature high-quality gold-plated circuit boards designed with the free and open source software KiCad. These compact keyboards are driven by the Seeed Studio XIAO RP2040 with Raspberry Pi RP2040 microcontroller, ensuring top-notch performance. Equipped with a USB-C connector and a charming mini yellow-blue OLED display, they combine functionality with visual appeal. Thanks to the popular open-source KMK firmware written in CircuitPython, personalizing keyboard layouts and macros becomes a breeze.
ANAVI Arrows
Import your typing experience with our bright and shiny compact mechanical keyboards, made in Plovdiv, Bulgaria, EU. Support our crowdfunding campaign and help us bring these unique and high-quality open source keyboards to life.
