11. Input devices#
- Measure the analog levels and digital signals in an input device
We measured following signals with the board created at individual work.
- Analog signal = Light sensor data
- Digital signal = Serial data
- Tektronix TBS1052B ( Manual)
Serial data signal#
Transmitting the light sensor data consists of 2 byte, ADC High and ADC Low.
The baud rate is 9600bps. So the width of a bit is: 1000ms / 9600 = 0.104ms. We can read the data as follows.
Light sensor signal#
We attached the probe to light sensor and measured the analogue level. The signal was upped about 500mv when the sensor was covered.