Drawing the raw circuit (left), optimising the circuit for own purposes (right), analysing the ingredients and soldering the 1st prototypes…
The pcb’s were just soldered and therefore not tested nor verified yet!
The SDT-Pcb could be connnected directly to the Arduino though due to the limited amount of available free pins with my TFT-Touch screen I decided to add it to my MCP23016 Pin expander chip/ shield to operate it on the available a4/a5 i2c pins later.
Now it’s time for checking & testing the pcb’s and create some arduino code so that we could do our first real tests…
Will be continued…
mcu4life 