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=Radioshack Electronics Learning Lab Collaborative Lab Reports=

Group Members' Names: Emily, Caroline, Alyssa

Group Name: Charlie Brown!

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

Template for entry (Copy the template below exactly!)

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)

LED Flasher
- Function of the circuit: The LED Flasher emits a light on and off consistently.

- Components used in the circuit (listing with basic definitions):
 * The __circuit board__ is where the circuit is built.
 * __Integrated Circuits__ are electronic circuits etched on a sliver of Silicon.
 * A __resistor__ resists the flow of electricity. The type of resistors used in the circuit are listed below.
 * yel-vio-red
 * brn-blk-org
 * brn-blk-red
 * A __Capacitor__ (C1 - 10 UF) stores electrical charge and blocks continuous current while passing current pulses.
 * A __LED__ emits light of one color.

- Explanation of difficulties encountered while creating the circuit: One of the difficulties that was experienced was finding the right colors on the resistors. Another difficult thing was finding the right holes on the circuit board, the last difficulty was that some of the wires came out of the correct hole on the circuit board, and the wires had to be relocated.

Figure 1. LED Flasher Circuit

media type="custom" key="531143" Video 1. LED Components

media type="custom" key="531149" Video 2. LED Circuit Completed

555
__Function of the circuit__: The 555 produces a tone.

__Components in the circuit(list with basic definitions):__

The components used in the 555 include a breadboard, wires, resistors, a capacitor, and an integrated circuit.

A breadboard is where the circuit is built. The 10 wires provides a pathway for the flow of electricity. The 3 resistors in the circuit resists the flow of electricity. The capacitor (C1-0.1-UF 104) stores electrical charge and blocks continuous current while passing current pulses. The integrated circuit has electronic circuits etched on a sliver of Silicon
 * 3 white wires
 * 3 red wires
 * 4 blue wires
 * R1:brown-black-orange
 * R2: brown-black red
 * R3: brown-black-brown

__Explanation of difficulties encountered while creating the circuit:__

Difficulties included figuring out how to use the springs. Difficulties also included figuring out whether the capacitor was directional. It was also hard to find the right holes in the breadboard.

__Seperate Tests__ Once the circuit was finished, a resistor and capacitor test was run. When R1 was replaced with a 100k resistor, the tone changed to a buzzing sound. When the capacitor was replaced with a 103 capacitor, the sound that was emitted was higher than the original sound.

(Multimedia (Images, interviews, videos)

media type="custom" key="531163" Video 3. 555 Circuit

Figure 2. Emily and Circuit



Figure 3. Circuit Board 555

4011 Quad Nand Gate
- __Function of the circuit:__ The function of a circuit is to make a red and green alternating flasher.

- Components used in the circuit (listing with basic definitions): 2 intergrated circuits, 4 resistors, 1 capacitor, and 2 LED's were used.
 * 2 intergrated circuits
 * 4 resistors
 * 3 brown-black-red
 * 1 brown-black-yellow
 * one C1-1 UF capacitor
 * 1 green LED
 * 1 red LED

- Explanation of difficulties encountered while creating the circuit: There were some questions about how many resistors to use because the instructions were different than before. The integrated circuits were hard to fit in their place. The circuit never functioned properly, even after checking all steps and the entire circuit multiple times.

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

media type="custom" key="545253" Video 4.LED Alternating Flasher

__Charlie Brown__. 27 Feb 2008 <[|http://www.redkid.net/generator/snoopy/charlie.jpg>.]