We are in the early stages of planning a token dispenser with multiple hoppers. We would like to send the pulses out to the hoppers while at the same time reading the pulses in from the sensors to verify the token drop and make sure we dont over or under dispense. Question is, can we pulse out to 8 hoppers and read back from them using just the arduino or will we have to use another IC as well? Will we have to run the pulses serially? (pulse out hopper 1, read hopper 1, pulse out hopper 2, read hopper 2) which seems really slow
would using something like this work http://www.arduino.cc/en/Tutorial/ShiftIn ?
sorry for the complete novice questions.