The basic idea behind the ForEx display is pretty simple. Connect a microcontroller with the internet, fetch periodically the required information from accessible API’s and display it on a TFT. Then put this electronics in a 3D printed housing, work a bit on a smooth finish and done.
Beside of this I added some additional things which aren’t absolutely required (optional) but can be helpful or increase the usability:
- A photocell to measure the brightness in the room and dim - with additional transistor - the brightness of the display. This avoid the display to illuminate the whole office while the night time.
- Sensors like temperature, pressure, humidity, etc. can be added to the I2C bus and do allow additional display of those values.
A rechargeable battery allows operating temporary without a power connection but makes a switch necessary as well.
The ESP8266 (ESP-12E) programmed with the Arduino IDE and a 128*160 cheap TFT work perfectly for this application and generate very low costs