P3Group+2

toc

=Radioshack Electronics Learning Lab Collaborative Lab Reports=

Group Members' Names: Adit, Joseph, and Alex.

Group Name: Breadcrumbs

Write in third person in all cases as well as in complete sentences.

Template for entry (Copy the template below exactly!)

LED Flasher
- Function of the circuit: The function of the circuit is to flash an LED.

- Components used in the circuit (listing with basic definitions):
 * An Integrated Circuit: Integrated Circuits are microscopic electronic circuits etched on a sliver of silicon called a "chip" and installed in a plastic, metal or ceramic package with external leads or pins.
 * 1 Red Wire: A wire with a red insulator covering it.
 * 3 White Wires: A wire with a white insulator covering it.
 * 3 Resistors: Resistors add resistance to the circuit and decrease the current of the circuit based on Ohm's Law.
 * 1 CI-10 UF Capacitor: Capacitors store an electrical charge and smooth a fluctuating signal. They block continuous current while passing current pulses. In this circuit the capacitor determines the frequency and the duration of the LED's flashes.
 * 1 Green LED: A diode (which is an n-type and a p-type semiconductor tied together) that emits green light. Current can only flow 1 way through a diode.

- Explanation of difficulties encountered while creating the circuit: > > - Multimedia (Images, Interviews, Videos- make sure to title and number them) >
 * Keeping the bare wires from touching each other
 * Making sure that the positive and negative ends of the capacitor and the LED were in the correct holes (as opposed to being switched around)
 * Making sure that //all// of the wires were in the //exact// holes (for example, F13 as opposed to G13 or F14)

Figure 1: Inside a Light Emitting Diode HowStuffWorks, Inc., "How Light Emitting Diodes Work." __howstuffworks__. 20 Feb 2008. 22 Feb 2008 <[|http://electronics.howstuffworks.com/led3.htm>.] Figure 2: Image of a Radio Shack Electronic Learning Lab Radio Shack. "Toys & Games: Hobby Projects & Kits ." 20 Feb 2008. 20 Feb 2008 <[|http://www.radioshack.com/sm-electronics-learning-lab--pi-2102913.html>.]

media type="custom" key="527781" Video 1: Interview About the LED Flasher Circuit

555 "Black Box" Circuit
- Function of the circuit: The function of the circuit is to make a buzzer buzz. It creates a tone with a frequency controlled by the capacitor and the resistor.

- Components used in the circuit (listing with basic definitions) > > - Explanation of difficulties encountered while creating the circuit: There were many difficulties that were experienced while making this circuit, such as making sure that the bare wires in the springs did not touch each other and making sure that all of the leads were in the right holes/springs. > > - Multimedia (Images, Interviews, Videos- make sure to title and number them) Figure 3: Image of a "Black Box" MIT, "Analysis and Design of Digital Integrated Circuits." __MITopenCOURSEWARE__. 25 Feb 2008. 25 Feb 2008 <[|http://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/6-374Fall2003/CourseHome/>.]
 * 3 White wires: A wire with a white insulator covering it.
 * 4 Red wires: A wire with a red insulator covering it.
 * 4 Blue wires: A wire with a blue insulator covering it.
 * Integrated Circuit: Integrated Circuits are microscopic electronic circuits etched on a sliver of silicon called a "chip" and installed in a plastic, metal or ceramic package with external leads or pins.
 * C1-0.1: Capacitors store an electrical charge and smooth a fluctuating signal. They block continuous current while passing current pulses. In this circuit the capacitor determines the frequency and the duration of the buzz. The capacitor in this circuit is one of the things that control the frequency of the buzzer's tone.
 * 3 Resistors: Resistors add resistance to the circuit and decrease the current of the circuit based on Ohm's Law. The resistors in this circuit are some of the things that control the frequency of the buzzer's tone.

media type="custom" key="543611" Video 2: Interview About the 555 "Black Box" Test Circuit

"Partially On/Off" NPN Transistor Switching Circuit
- Function of the circuit: This circuit uses an NPN transistor as a switch that controls the current to a buzzer.

- Components used in the circuit (listing with basic definitions): > > - Explanation of difficulties encountered while creating the circuit: Some difficulties encountered while creating the circuit were making sure that all of the leads were in the correct holes. Another difficulty, though it was more of an annoyance than a difficulty, was putting the leads in the springs correctly. > > - Multimedia (Images, Interviews, Videos- make sure to title and number them Figure 4: Image of an NPN Transistor Unknown, "Experiment 3.1." __ELEC 242 Lab__. 25 Feb 2008. 25 Feb 2008 http://www-ece.rice.edu/~jdw/242_lab3/exp3.1.html.
 * One NPN Transistor: NPN transistors (as well as PNP transistors) are used as switches and amplifiers. They have three leads, the emitter, the base and the collector. A small amount of current at the base can greatly affect the amount of current between the collector and the emitter (therefore acting as an amplifier and a switch at the same time).
 * One 1K resistor: Resistors add resistance to the circuit and decrease the current of the circuit based on Ohm's Law. The function of this resistor in this circuit is to limit the amount of current going to the base of the NPN transistor, and therefore affecting the amount of current that reaches the buzzer.
 * One 10K Resistor Console Pot: Resistors add resistance to the circuit and decrease the current of the circuit based on Ohm's Law.Resistors add resistance to the circuit and decrease the current of the circuit based on Ohm's Law. The function of this resistor is the same as the 1K resistor.
 * One White Wire: A wire with a white insulator covering it.
 * Three Blue Wires: A wire with a blue insulator covering it.
 * Two Red Wires: A wire with a red insulator covering it.

media type="custom" key="543617" Video 3: Interview About the NPN Transistor Switching Circuit

Name of Circuit
- Function of the circuit:

- Components used in the circuit (listing with basic definitions):

- Explanation of difficulties encountered while creating the circuit:

- Multimedia (Images, Interviews, Videos- make sure to title and number them)