The TTL Chip

Below are a schematic diagram and a photo of the 14-pin TTL chip that you will use to construct the circuit. Each chip contains 4 NAND gates. Connections to these gates are made via the external pins, so it is important to note which pins constitute the inputs and outputs to each gate.

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The Prototype Board

For construction of temporary circuits, a prototype board is often used as it eliminates the need for soldering and wire connectors. Wires are inserted into the appropriate slots to form the necessary connections.

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Example Circuit

Click here to learn how to wire this simple circuit
using the TTL chip and the prototype board