tusday april 5th
-today is the first day of electrical and electronics,we went over the laws and basic of ohms+3 triangle formula: 1 to get voltage(v)=current x resistance(R) 2: to get current is voltage/resistance and last is to get Resistance=voltag/current. We also leant how to build up a series circuit, first we connect the power souce to the board,positive wire to the fuse then another wire to the switch,a wire from the switch to the light bulb and wire back to the negative of the battery.
Later on the afternoon we built another circuit with the exact compoent but with 3 big light bulb connected,and we did a cauculation on current on all this bulbs,to measure the current in the circuit we needed the circuit to be broken and the mutimeter to be apart of the circuit. We found out that the currents are the same no matter where you test it.
wednesday april 6
-soo today is another day working circuits,we built a parallel circuit!
so first we power up the circuit board and the positive wire to the fuse and to the switch,and then we have 2 wires to the first bulb each,then from both bulb a wire connect to the negative of the battery, we also did the voltage drop and the aviable voltage on this parrallel circuit, to measure voltage in a circuit the circuit must be prarallel connected and to measure voltage drop in a circuit,and the mutimeter must connected to the input and the output of the component is measuring,and to measure aviable voltage and red and black probe needs to go to the negative and the red to the positve,likewise to avoild blowing up the fuse.
thursday april 7
-soo today we are making the logic probe,that its to check power in a power source like a battery, material used in this was a brass rod(conductor) 1 red led light and 1 green LED,a black meter 1 black alligator clip, a red alligator clip also plastic tubing. after awhile i got the probe done and tested and its ok,for this to work on the car you put the neg and pos on the neg postive on the battery.
Friday april 8
-we did both series on parallel and series into one,we put two bulbs in a parrael and one in a series,with the fuse,power and switch wires,two wires in each for the first 2 bulb,one parallel negative connect to the negative in the series bulb and back to the negative of the battery.after that we measure the resistance of each bulb using R=V/C and for watts is w=V x C. the avaiable voltage in the parallel bulbs are 8v each and none in the series circuit.
Sunday, April 17, 2011
Saturday, April 16, 2011
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