Skip to content

14. Inputs (CLS Students)

Group 1 - Nick, Jack, Aaron,

The three all worked on measuring an analog input, whereas group 2 did digital input. With this in mind, they used Nick’s soil moisture sensor. Nick wired the sensor up to an osiliscope based off a tutorial found by Aaron which can be found here. Aaron helped set up the osiliscope as well as Jack and the two of them took the photos and videos.

From here, Nick filled a cup he had with water to test the data pin coming off of the sensor. In the video below, you can see the waves on the osiliscape be effected by Nick dipping the sensor and drying it.

Nick wrote the above documentation whilst Aaron and Jack inserted their respective images/videos.

Group 2 - Alaric and Aarush

Aarush and Alaric probed Alaric’s input board consisting of a 3d hall effect sensor to see the signals with an oscilloscope. The sensor uses i2c to send data back, so the readings would be digital highs and lows to represent bytes. Aarush made the decision that it would be best to wire the probe to the SDA and ground it with the ground of the board.

Alaric interpreted the results of the readings noting that it was high most of the time due to the fact that i2c needs a pullup resistor. There would be flashes where the reading goes low which shows the line being pulled to low while sending information.

Jada, Pari and Andrew

Jada, Pari, and Andrew, used Pari’s Doppler Radar Sensor because we are also testing analog inputs. Jada helped wire the radar and connected the Doppler Radar using the the ground power and analog pins. Andrew helped set up the oscilloscope using this site they found while researching the sensor. Then Pari read the value off from the oscilloscope. They all took pictures, videos, and notes on how the oscilloscope functioned and how it connected to the sensor. The three figured out how to use the oscilloscope to help read whether the sensor was detecting movement or not. This is the result Pari recorded:

Last update: June 13, 2022