Blog 2: Experiments with Thermal Switches - The Setup

28 Mar 2022

Firstly I would like to thank both KEMET and element14 for the opportunity. I have learned a lot of things in this experiment. I had received a kit with 12 sensors and all are amazing

for their respective applications.

Kit

In this experiment, I'm testing how one can check the accuracy and the point at which the conductivity begins and the effect of an external magnetic field on the device

Since I wanted to measure both temperatures near to the sensor and also the magnetic field, I thought of building one small experimental setup consisting of a microcontroller,

a display, a 3d magnetic field sensor and also a temperature sensor.

Here are the things that I chose:

1. 16x2 LCD display (Seeed Studio Grove LCD Display, I2C)

2. Arduino Uno MCU

3. Grove Button Module

4. Grove Buzzer Module

5. TLV-493D-A1B6 3D magnetic field sensor

6. Grove temperature sensor module

7. Jumper wires

8. Battery bank

9. Kemet thermal switches

10. Liquid Nitrogen Spray to simulate low temperature

11. Grove Arduino shield

12. Neodynium magnets

Connections and about the sensors:

KEMET thermal switches are temperature-dependent and also magnetic field dependent their make and brake can change based on the change in the

either of the two parameters. Hence I wanted to measure both the trigger points. So I will be using both temperature and magnetic field sensors to measure the

the temperature in * C and magnetic field in mT respectively.

Infineon TLV-493D-A1B6 is a 3D magnetic field sensor that can be used to detect minor changes in the magnetic field also and hence it is heavily used in automotive, robotics and

other industrial applications.

I will be using the sensor to detect the magnetic field around the sensor at the time of state change or make-break.

This magnetic field sensor is an I2C device and its address is 5E. I bought this separately and soldered it onto a small 18 pin SOIC holder PCB as its pitch is too small.