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The UJT Relaxation Oscillator

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In this animated object, students view diagrams of the UJT as it is used in the relaxation oscillator circuit. Waveforms illustrate how the circuit operates through several time periods.

How Current Requires Voltage

By Terry Bartelt

This learning activity uses a water pressure analogy to present the concept that voltage pressure is required to cause current flow.

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The Reynolds Number

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In this animated learning object, users study the factors that affect a pipe’s fluid flow and how those factors pertain to a numerical value (the Reynolds Number).
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PLC Sinking Input Modules

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In this animated object, learners examine how to wire field devices to a PLC sinking input module.
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Silicon Diode Basics

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This primer introduces the student to the key terms and concepts associated with the silicon diode.
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