ESP8226 Stock Ticker
I created my stock ticker using an ESP8226 and two 8x32 led matrices. The led matrix is used to display a user-defined ticker along with its current price and change.
The ESP8226 runs on firmware forked from an open-source project. The original project used an API that has since been depreciated, so I switched to the Yahoo Finance API available through Rapid API.
The free version of this API comes with a hard limit of 500 calls a month, so I designed around this to keep costs down. An NTP clock is used to check the time and only display stock tickers between 8-5. Outside of this time, the display simply shows the time.
Once the code was complete, I made a custom wooden enclosure.
I cut a pine board into an L shape to accept the LED matrix screen. Then, the corners were mitered and the case was glued and nailed together. A hole on the end was added to later accept a power supply receptacle.
I then finished the case with stain to accent the translucent acrylic that the LED matrix is attached to.