This week, our components such as the mosfet boards and sensors had finally arrived from China and so we spent a busy week soldering and extending the wires for our circuitry (Qi Jie called us a ‘soldering factory’!). We also connected and tested all our components using Codesys to check for control and sensing.

Fig. 1: 2D schematic of circuit

Individually, we were able to control the fan speed and target air temperature as well as the turning on of the various components. We were slightly apprehensive when we wanted to connect the entire circuit together, as we were afraid that we might short circuit something and damage a component. It was also at this time where another group’s capacitor exploded, creating a certain level of fear that a mini explosion would happen to us too. We checked and double-checked the circuit multiple times to verify that there were no potential areas for a short circuit before finally turning on the power supply. To everyone’s great relief, no “exciting event” occurred and we were able to test the functioning of all the components together. However, we realised that Zhen Xuan forgot to code for a function that would turn the set-up off. While that was a minor problem, we ended the week with the relief of knowing that our code and circuitry were functioning.