The Voltage Regulator 7805 was wired to the breadboard. The power jack was then soldered to wiring and connected it to the Voltage Regulator. The voltage through the circuit was tested and proved to be a regulated 5V.
Basic Circuit:
The circuit was rewired to set up a momentary switch, LED, and resistor in series. When the momentary switch was pressed the LED lit up. The multimeter was used to test the required voltage measurements:
+ Voltage across the switch when closed: 0V
+ Voltage across LED: 2V
+ Voltage across resistor: 1.76V
Series:
The momentary switch and resistor were removed from the circuit. Two LEDs were set up in series and they lit up when the power supply was connected to the power jack. The voltage was tested at various points in the circuit:
+ Voltage across each resistor: 2.51 V
+ Voltage across full circuit: 5.03 V
No resistors are needed in this circuit because each LED uses half the voltage and there is no excess voltage to burn out the LED.
Parallel:
The circuit was rewired to set up three resistors in parallel followed by a resistor in series. The voltage across each resistor was 1.92V. The multimeter was placed in series with the circuit and the current reading was 8.36mA.
Varying Voltage:
Three wires were soldered to the potentiometer. The circuit was rewired to set up a resistor and LED in series. The potentiometer was adjusted and the following voltages and LED behavior were observed:
+ Max voltage on potentiometer: 3.61V - Brightest LED
+ High voltage on potentiometer: 2.11V - Less bright LED
+ Low voltage on potentiometer: 1.68V - Dim LED
+ Minimum voltage on potentiometer: 0V - No light LED
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