Step 1: Requirements
2.LED's(I have used RED color LED)
3.Paper,sketch and scissor
6.9v battery and connector
7.Resistor (680 ohms)
The reason for using 680 ohms:
To find resistance,[R= (Vs-Vf)/If]
Vs-Supply voltage(9 volts),
Vf-Forward voltage of Red LED(2.2 volts),
If-Forward current of RED LED(10mA).
On substituting the values,We will get Resistance of 680 ohms.
Step 2: Basement
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Step 3: Setting It Up
1.Place your leds in parellel(Positive to Positive & Negative to Negative of one LED to the next one).
The reason that why we are using this PARELLEL CONNECTION is,The VOLTAGE will be same in PARELLEL.
Therefore we can use small voltages like(3v,6v,9v,12v) for this whole setup.After placing all the LED's cut down the paper.
EDIT:[ We are going to connect all LED's in parellel(means all positives are connected together and all negatives together),Then connect the positive terminal of the battery to the any positive of the LED(remember all LED positives are connected together).similiarly connect the positive terminal of the resistor to any negative of the LED,then connect both the negatives of the battery and resistor].
Step 4: Soldering
Coming back to our project,Solder the LED's on the PCB board.Connect the Resistor at the negative terminal of the LED's.After connecting positive terminal of the battery to the positive terminal ot the positive of Positive LED,Connect negative of the battery to the negative of the resistor.
Step 5: Tada!!
Thanks for reading my instructable..
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For any doubts and suggestions,please comment.(also for grammar mistakes).