Fab Lab Ciudad de México

Mexico City

Group Assignment – Input Devices- CDMX

The first one we measured was the pressure sensor from Rodrigo’s final project.

Specifications

Wokring Voltage: DC 5±0.5V

Working Current: ≤10mA (DC 5V)

Working Voltage: DC 0.5~4.5V

Working Pressure Rate Range: 0~1.2Mpa

Max. Pressure: 2.4Mpa

Destructive pressure: 3.0Mpa

Working Temperature: -20~+ 105􀔨

Storage Temperature: -20~+ 105􀔨

Measurement Accuracy: ±1.5%FS

Response Time: ≤2.0ms

IP65

Cycle Life: 1,000,000 pcs

This sensor, you supply 5V and just read the analog signal from the green lead.

 

This is how we connected it to Rodrigo´s board

We are measuring the output voltage from the signal, and we are getting 504.9 mV when idle.

Here is a video of us measuring the value when we blow on it .

As you can see, we get values of up to 540mV when we blow on the sensor.

The second sensor we measured was an LDR from Hugo’s final project.

Here is a video of us measuring the voltage on the LDR, It is reading values of up to 2V when we put a finger over it.

Overall, measuring analog signals is easy when the microcontroller has an Analog to digital converter which in most cases will convert the analog signal to a number between 0 and 255.

Copyright Fab Lab

Ciudad de México 2021