P1Group+4

=Radioshack Electronics Learning Lab Collaborative Lab Reports=

Group Members' Names: Marion, Eric

Group Name:

LED Flasher
//The function of this circuit is to make the LED light up and flash.//

WIRES- Wires connected the circuit parts. RESISTORS- Resistors keep the electric current from being too strong to the LED and blowing it out. CAPACITOR- The capacitor stores and regulates current flow; it is responsible for the flashing of the light bulb. LED- The LED or light emmiting diode was the load in this circuit. (see below in multimedia for a diagram of how it works) INTEGRATED CIRCUIT- An integrated circuit is a microscopic electric circuit etched on a silicon chip.
 * Components used in this circuit-**

Some difficulties encountered during the constructing of this circuit were the misplacement of wires in the bread board. It was hard to determine the positive and negative end of the capacitor so this caused the circuit not to work. This was a pretty simple circuit so there were not too many difficulties.

=555 Circuit=

//The function of this circuit is to construct a circuit that makes the buzzer buzz.//

WIRES- Wires connected the circuit parts. RESISTORS- Resistors keep the electric current from being too strong to the buzzer. CAPACITOR- The capacitor stores and regulates current flow. BUZZER- The Buzzer on the circuit board is the load in the circuit. It works when the circuit is properly assembled. INTEGRATED CIRCUIT- The integrated circuit is a microscopic electric circuit etched on a silicon chip.
 * Components used in this circuit-**

Some difficulties encountered in this circuit were caused by the misplacement wires in the bread board, capacitor cathode and anodes in the wrong place made the circuit fail on the first try. Identifying the right resistors and putting them into the breadboard was a challenge. Making sure the 555 integrated circuit has the correct pin in the correct hole in the breadboard was confusing. This circuit was definitely more difficult that the LED flasher circuit!

Buzzer Triggered by Light or Darkness Circuit
//The function of this circuit is to make a buzzer buzz according to the light in the room.//

WIRES- Wires are used to connect the springs and parts in the circuit. RESISTORS- Resistors resist the flow of current in the circuit so the loads will not be blown out. INTEGRATED CIRCUITS- An integrated circuit is a microscopic electric circuit etched on a silicon chip. There are two integrated circuits in the circuit. BUZZER- The buzzer is the load in the circuit. When the circuit is assembled correctly it should begin to buzz. PHOTO- RESISTER- The photoresistor is used in this circuit to adjust to light and dark, the photoresistor is sensitivo to light therefore when it is exposed to light the buzzer buzzes and when the light is shut of the buzzer stops buzzing.

This circuit was not too difficult, the buzzer worked on the second try. The first try it did not work because we had the integrated circuit in the wrong place. At first the circuit seemed not to work on the second try because the buzzer started buzzing once the circuit was turned on even though no light was applied to the photoresistor. Then Mrs. Todd tried covering up the photoresistor and since there was no light applied to it the buzzer shut off. The conclusion was made that since the lights were already on no extra light needed to be applied to the photoresistor.


 * - Multimedia**

LED Flasher

Light/ Dark Buzzer Schematic

LED- ?, ?. "How Light Emmiting Diodes Work." __howstuffworks__. HowStuffWorks. 27 Feb 2008 .

Integrated Circuit- ?, ?. "istockphoto_187345_integrated_circuit." __istockphoto__. ?. istockphoto. 27 Feb 2008 <[|http://www1.istockphoto.com/file_thumbview_approve/187345/2/istockphoto_187345_integrated_circuit.jpg>.]

==

Light and Dark Buzzer

media type="custom" key="539805"

(555 Buzzer Video)

media type="custom" key="543237" (Light and Dark Buzzer Video)