Electronics: 741 OPERATIONAL AMPLIFIER (OP-AMP)
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This chip is designed to accept two inputs on pins 2 and 3. The difference between the inputs is amplified to give the output. If the voltage on pin 2 is greater than pin 3 the output is negative. If pin 3 is greater than pin 2 the output is positive. The Op-Amp gives a voltage gain as opposed to a transistor which gives a current gain.

Uses: Switching, amplifiers, oscillators and analogue computing.

Data:
Pin
1 OFFSET NULL not normally used
2 inverting input
3 non inverting input
4 0V is connected to the zero supply
5 OFFSET NULL not normally used
6 OUTPUT
7 positive (+ve) supply voltage (+3V to +18V)

OFFSET NULL is used to balance output in high gain applications.

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