How to Connect a Transistor to the Output From an IC

Integrated circuits -- also known as ICs -- are shrunken-down electronic circuits that fit inside a microchip package. Many electronic devices use ICs rather than discrete analog electronic components because of their smaller footprint, lower energy consumption and ease of replacement. ICs can be connected electrically to other ICs, transistors or other electronic devices. Some circuits -- such as multi-stage amplifiers -- allow the integrated circuit to be used to provide a signal to another device. In the case of a multi-stage amplifier, the IC output lead would be electrically connected to the input of the second stage, such as the base lead of a transistor.

Things You'll Need

• LM158 operational amplifier integrated circuit
• Electrical wire
• Electrical pliers
• Electronic solder
• Soldering iron
• Bipolar junction transistor

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Instructions

1. • 1

     Cut a length of wire. Strip 1/2 inch of insulating material from each end of this wire.

   • 2

     Twist one end of the wire to the output lead on the op-amp (pin 1). Solder this connection.

   • 3

     Twist the loose end of this wire to the base lead on the transistor. Solder this connection.