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Build and learn about an ‘AND’ and ‘OR’ computer logic circuit
RN: 11020701 - ELECTRICITY & MAGNETISM > SOLID STATE ELECTRONICS
7 & 8
The first complex electronic appliances were all made up of various single components such as tubes, capacitors, coils and resistors and transistors. Today 'integrated circuits' may contain thousands of these single components built into a much smaller single unit that can perform a handful of operations. Such circuits can include storage of data 'flip-flops' and 'gates'. A 'logic gate' is a circuit that will allow passage of a signal under certain conditions only. The two most common computer logic gates are the 'AND' and the 'OR' gates. Use toggle switches to represent the concept of 'AND' and 'OR' computer logic gates in the following science experiment:
STUFF YOU NEED [MATERIALS]
- SMALL ELECTRONIC BREADBOARD
- INSULATED SOLID HOOK-UP WIRE
- 4x SINGLE THROW SWITCHES
- 2x LED LIGHTS
- 6-VOLT BATTERY
- SOLDERING IRON & WIRE
- WIRE CUTTERS
- ADULT HELPER
HOW TO PROCEED [PROCEDURE]
- Obtain a small piece of electronic 'breadboard', two 6 volt LED lights and four single pole / single throw switches from an electronics hobby store.
- Working with a soldering iron is dangerous! Ask your parents or an adult to help you with the soldering iron to connect all the components to the breadboard to form the two circuits as in the diagram above (the polarity of all the components in this experiment is important, make sure you connect the '+' and '-'terminals of each correctly!).
- ...... NOTE: The last few steps of this science experiment are only contained in the e-book version. Thank you for your support!
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