I have been trying to run hackintosh in a VirtualBox VM for some iOS compiling. The issue I ran into was that the VM got stuck after booting on a gray screen. After searching around I found a solution that wasn’t really documented anywhere else.
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CryptoTicker is an information display board that supports over 1500 coin pairs. The PCB consists of 4 individual 1.3″ OLED displays controlled by an ESP32. These displays can show a coin pair each. The display outputs are shifted using a multiplexor. Updating or changing the information on the fly is possible from the localhost web server that is running on the device. Vertical and Horizontal positioning is possible. There are 4 programmable push-buttons located on the back of the device.
The device can be extendable to support up to 8 displays or with extra multiplexors up to 64 displays.
I have gotten a bigger 2.42″ OLED display from Aliexpress. I got the 16pin version instead of the 7 pin one.
This is the copy of the SSD1306 that Adafruit sells and the same library works with it. It supports 8bit, I2C and SPI. The only problem I had was with the wiring for I2C. As usual, Aliexpress sellers do not offer any documentation or help. I managed to find some schematics online.
The main concern was to find a good combination of price, power and availability. The market is filled with cheap with IoT chips and single board computers.
The hardware for my product had to be affordable. For the CPU I originally started the prototyping using a Raspberry Pi zero W the Wi-Fi version. My first PCB was based on this board. I used 90-degree SMD dual pin headers to connect the raspberry pi to the PCB. I went with SMD pin headers so I could keep the other side of the PCB clean and flush for the LCD-s.
For the screen, I wanted a challenge. I wanted to use multiple small one coloured OLED displays. The displays I found online were from Aliexpress. And are inexpensive for what they offer.
I have purchased a rather cheap gyro L3G4200D sensor from eBay that can detect 3 axis rotation and deliver it through an I2C or SPI interface. I tried to use it to detect horizontal and vertical rotation in real-time. This turned out quite difficult as I could not visualize what the Gyro was outputting. I needed a visualization. I ended up using Blender to visualize the gyro that is connected to an Arduino Uno. With this combination, I got a real-time report that turned out pretty good and proved the sensor to be quite accurate at what it does.
I found little to no information about setting up virtual hosts for this device so I made this guide.
I have had some troubles in the past with the web station on my Synology unit. It probably happened because I tried to set up another package in the past and accidentally deleted a folder or a symlink.
A program that links multiple torrent clients into a simple manager. This allows users to add multiple torrent managers which are running on different systems/devices. Adding multiple instances of the same torrent manager are possible, allowing the user to set multiple download folders, something many torrent managers do not support.
Easy STOP/START button solution for stopping and starting 3D printing jobs using octoprint, running on raspberry pi from the printer’s location. The script can be edited to work on any device with GPIO and is meant to be a baseline for more complicated projects.
