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A cool Op-Amp demonstration: Differential Light Meter

Step 6: Powering the Op Amp

Picture of Powering the Op Amp
Now we will connect the circuit components shown in step 5.  
First, let's power up the op amp.

1. Connect the fourth pin on the op-amp to the negative power supply (-15 V) using jumper wires. This is shown with the yellow wire.
2. Connect the seventh pin on the op-amp to the positive power supply (15 V) using jumper wires. This is shown with the red wire.
 
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