Week 4
During the week 4 lab, we learned how to use a soldering iron. Intense heat is used to connect metal portions of wires and other electrical components together. Using this knowledge, we started on the mechanical construction portion of our project, specifically the instrumentation amplifier. DJ gave us a schematic to follow, which can be seen below as Figure 1.
Figure 1: Instrumentation Amplifier Schematic
We focused mainly on soldering the capacitors, resistors and amplifier onto the circuit board first. We had to compensate for the lack of space on the circuit board. There wasn't much surface area on the circuit board to allow adequate space between the resistors and capacitors. We also had to be careful to not solder the positive and negative ends of the resistors together.
As seen in the schematic, some resistors (R1, R2, R3, R4) and reference electrodes (REFA and REFB) will need to go to ground. So, we thought about putting a wire around the circuit board to act as ground.
Figure 2: Circuit Board in Progress
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