Week 1 Day 2

Lecture 

Topology Problem, branches  is equal to number of loop and nodes subtracted by one

Another Kirchoff problem :(

Resistors and Ohm's Law Lab.

The overall look of the circuit when we measure the voltage and resistance, in this set up we place our DMM in parallel with the resistor:

A closer look at how we measure the resistance of resistor:

Resistor have a value of 100 ohm

Circuit set up on measuring current, in this set up we put our DMM in series with the resistor

We measured and recorded the value of current in different voltage:

Sketching the current versus voltage. we can see that the voltage have a linear relationship with current 

MOSFET Lab

Set up of voltage gate in Waveform software. here we set our current to be a DC current with value ranges from 1V to 5 V

The overall look of our MOSFET circuit set up:

Closer look of our set up, the alligator clips are connected to DMM and placed in series with the 100 Ohm resistor

We recorded  the value of current for different value of voltage gate

The graph of current versus voltage gate. The current and voltage shows a linear relationship between 1.5 V to 2 V and levels up to 5 V

Summary:

In a simple resistor-independent voltage source, the current is directly proportional to the voltage.
V=IR, where V represent voltage, I represent current, and R represents resistance. MOSFET acted as Voltage Controlled Current Source. The bigger the voltage gate the bigger the current flows to the circuit. when the value of voltage gate is greater than 3V, the current levels up to 50 mA (The MOSFET transistor have zero resistance)