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The Op-amp as an Inverter
The aims of this activity are to understand the dual rail power supply required by an op-amp, investigate the use of an … full details...
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Gear and Pulley Systems
This is a short activity that contains a simulation of a gear and pulley system to give students practice identifying th… full details...
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Switch De-bouncing
The problem of 'electrical bounce' is explained, and a method to 'de-bounce' a switch using two NAND gates is outlined. … full details...
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Open- and Closed-Loop Circuits using Op-Amps
This activity further investigates the use of an op-amp as a voltage amplifier. Students learn how to calculate the vol… full details...
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Cells Connected in Series
Students are taught that a battery is made of two or more cells. Circuit diagrams of cells connected in series show tha… full details...
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Combining Logic Gates
Combinations of AND, OR and NOT logic gates are examined, and students list the logic outputs for different inputs to a … full details...
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The Decade Counter
This model examines circuits with a BCD to decimal decoder to see that as you push a switch the BCD counts in binary and… full details...
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The Op-Amp as a Comparator
In this activity the use of the operational amplifier as a comparator is studied. The student amends a circuit involving… full details...
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Switches II
This activity gives a short introduction to the circuit symbols for a battery, lamp, SPST switch and push-to-make switch… full details...
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Capacitors
This activity teaches that a capacitor stores electric charge. Students observe the voltage-time graph of a capacitor t… full details...