Hello there,
i want to connect 4 units to my arduino, each consisting of a 3x7segment-Display or LCD, as well as 2 buttons(for increasing/decreasing) the numbers
since i need 4 LCDs i need some (spi?) Bus and the LCD cannot be too expensive.
Can you give me hints wich lcd to use (if possible without voltage shifting)?
do 3x7segment-units exist to be controlled via bus?
Greetings and thank you 