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=Radioshack Electronics Learning Lab Collaborative Lab Reports=

Group Members' Names: Rachel, Meredith, and Elizabeth

Group Name: R.E.M (like the band named after the rapid eye movement phase of sleep & also it is the first name of our names!)

Template:

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)

Name of Circuit: Flashing LED
- __Function of the circuit__: The circuit flashes and LED when it is turned on. It flashes at different rates depending on the size of the capacitor

- Components used in the circuit - R1 - 4.7 (yel-vio-red) - R2 -10K (brn-blk-org) - R3 -1K (brn-blk-org)
 * 1 capacitor to store electric charge
 * 1 green LED (a light emitting diode)
 * 1 555 integrated circuit which is many microscopic electronic circuits etched onto a sliver of silicon,
 * 3 resistors to resist the flow of electricity

//Diagram 1: Components of the LED Circuit//

Explanation of difficulties while creating the circuit: This was the first circuit that was made, so figuring out the correct way to put in some of the components was difficult. It was difffiuclt to find the positive versus negative ends of the components, and they all needed to be put into the circuit board the correct way, or the whole circuit would not work.

- Multimedia //Diagram 2: Labeled Schematic of the LED Circuit//

//Picture 1: Photo of a Circuit Board//

media type="custom" key="520465" width="88" height="87" //Video 1: Interview of Group//

Name of Circuit: 555
- __**Function of the circuit**__: The circuit makes a speaker buzz when it is turned on.

- **__Components used in the circuit:__** - brn-blk-org - brn-blk-red - brn-blk-brn
 * 555 integrated circuit which is a microscopic electronic circuits etched onto a sliver of silicon.
 * 3 resistors which resist the flow of electricity, and a capacitor which stores electric charge.

- __**Explanation of difficulties encountered while creating the circuit**__: This was the second circuit built, so it was not as difficult as the first. However, the springs were used for the first time when creating this circuit. This caused some difficulties at first, but the proper procedure for putting wires into springs was figured out, the rest of the circuit could be completed quickly and successfully.

- **__Multimedia:__**

//Picture 2: 555 Circuit 1st picture// //Picture 3: 555 Circuit 2nd picture// //Picture 4: 555 Circuit 3rd picture//

Name of Circuit: Dark-Light Sensor
- __**Function of the circuit**__: The circuit gives off a tone when the photo resistor is either dark or illuminated. There is a switch to make it go from these two modes, dark, and light.

- **__Components used in the circuit (listing with basic definitions):__** - R2-1k (BRN - BLK - RED):
 * 555: It is an integrated curcuit, which is a microscopic electronic circuits etched on a sliver of silicon.
 * C1-0.1 uF (104): It is a ceramic disk capacitor, which stores electric charge, and releases it when they are full.
 * C2 - 10 uF: It is an electrolytic capacitor which does the same thing as the ceramic disk capicator, it stores electric charge, and then releases it when it's full.
 * There were also multiple blue, white, and red wires.

- **__Explanation of difficulties encountered while creating the circuit__**: Some of the wires were barely long enough, they had to be laying completely flat for them to connect. It was also a challenge determining which side of some of the components was the cathode and which was the anode. Also, once the circuit was built, it was necessary to figure out where the photoresistor was so that the circit could be tested.

- **__Multimedia__**

media type="custom" key="540285" //Video 2: Explanation of Dark Light detector//

= = =Definitions of Components:=
 * [From the Basic Electronics:Transistors and Integrated Circuits (Radio shack) book]**

Definition 1: Definition of an LED

Definition 2: Definition of a Capacitor

Definition 3: Definition of a Resistor

Definition 4: Definition of Integrated Circuit

Definition 5: Definition of Connection Wires