# DC Circuits

## K7-43: RELAXATION OSCILLATOR - NEON LAMP

Category: K7 RLC Circuits
Purpose: Demonstrate a pulse circuit with different pulse rates.

Category: K7 RLC Circuits
Purpose: Demonstrate a barricade flasher circuit.

## K7-31: RLC CIRCUIT - OVER/UNDER/CRITICAL DAMPING

Category: K7 RLC Circuits
Purpose: Demonstrate over/under/critical damping in a series RLC circuit.

## K7-30: RLC CIRCUIT - RINGING

Category: K7 RLC Circuits
Purpose: Demonstrate ringing in a simple RLC circuit.

## K7-15: CURRENT IN RC CIRCUIT?

Category: K7 RLC Circuits
Purpose: Demonstrate charging of a capacitor in a possibly counterintuitive way.

## K7-12: RC CIRCUIT - RC TIME CONSTANT - PROJECTION METERS

Category: K7 RLC Circuits
Purpose: Measure an RC time constant and to observe the shape of the charging and discharging curves.

## K7-05: SERIES MOTOR AND LIGHT BULB CONUNDRUM

Category: K7 RLC Circuits
Purpose: Generate thought about how a motor works.

## K6-52: IMPEDANCE MATCHING - BATTERY AND JOULEMETER

Purpose: Demonstrate that the power transmission is maximized when the source impedance and the load impedance are equal.

## K6-51: KIRCHHOFF'S LAWS

Purpose: Apply Kirchhoff's laws to a simple two-loop problem.

## K6-36: VISIBLE AMMETER

Purpose: See some of the important parts inside an ammeter.

## K6-35: VOLTAGE DIVIDER

Purpose: Show how a voltage divider can be used to produce any voltage up to the maximum of the source.

## K6-33: WHEATSTONE BRIDGE

Purpose: Demonstrate operation of a Wheatstone bridge.

## K6-32: POTENTIOMETER

Purpose: Find an unknown EMF using a voltage divider.

## K6-12: SERIES/PARALLEL LIGHT CIRCUIT CONUNDRUM

Purpose: Test your ability to analyze series/parallel circuit.

## K5-42: TRANSISTOR

Purpose: Demonstrate a transistor circuit.

## I1-17: THERMOSTAT - MODEL

Purpose: Model of use of a bimetal strip in a thermostat.

## J4-43: CAPACITORS IN SERIES AND PARALLEL WITH PROJECTION METER

Purpose: Illustrate voltage relations in series and parallel capacitor circuits.

## J4-42: CAPACITORS IN SERIES AND PARALLEL

Purpose: Demonstrate the voltage/charge/capacitance relationships in series and parallel capacitor circuits.

## J4-03: PARALLEL PLATE CAPACITOR - SERIES CAPACITORS

Purpose: Demonstrate the effect of capacitors in series.

## K7-11 RC CIRCUIT - RC TIME CONSTANT - OSCILLOSCOPE

Category: K7 RLC Circuits
Purpose: Observe the shape of the charging and discharging curves. Measures an RC time constant.
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• #### K5-01: PIEZOELECTRICITY

Demonstration of a piezoelectric crystal Read More
• #### K5-02: PIEZOELECTRIC CRYSTAL - AUDIBLE

Demonstrate that a piezoelectric crystal converts electrical impulses into physical vibrations Read More
• #### K5-03: PIEZOELECTRIC IGNITOR

Show a commercial use for piezoelectricity Read More
• #### K5-04: PIEZOELECTRIC GUN

Application of piezoelectricity to produce copious quantities of electric charge Read More
• #### K5-11: BATTERY MODEL

Simple model of a battery using a human as the source of energy Read More
• #### K5-12 BATTERY AND CURRENT - WORKING MODEL

Model of battery with circuit attached Read More
• #### K5-13: ELECTRIC CURRENT - MODEL

Indicate how electrons really flow through a conductor Read More
• #### K5-14: ELECTRIC CELL

Demonstrate how an electric cell is formed Read More
• #### K5-16: CARRIER CURRENT DENSITY MODEL

Model the density of carriers crossing a plane Read More
• #### K5-21: AC PLUG CIRCUIT CHECKER

Check the wiring of 110VAC power sockets Read More
• #### K5-22: AC PLUG CIRCUIT CHECKER CHECKER

Demonstrate each different kind of wiring error Read More
• #### K5-23: ROTATING TWO-COLOR LED

Demonstrate that what comes out of a 110 VAC plug is in fact alternating current Read More
• #### K5-31 OHM'S LAW

Demonstrates relationship between current, voltage, and resistance Read More
• #### K5-32: RESISTANCE VS DIAMETER AND LENGTH

Determine how resistance varies as a function of diameter and length for the same material Read More
• #### K5-33 CONDUCTIVITY OF SALT SOLUTION

Shows that pure water is not conducting, but a solution of an electrolyte is conducting Read More
• #### K5-34: THERMAL COEFFICIENT OF RESISTANCE IN COPPER

Show that the resistance of copper changes linearly with temperature Read More
• #### K5-35: RESISTORS AT LN TEMPERATURE

Illustrate materials with both positive and negative temperature coefficients of resistivity Read More
• #### K5-36: RESISTORS AT LN TEMPERATURE - LIGHT BULB INDICATOR

Demonstrate materials with both positive and negative temperature coefficients of resistance Read More
• #### K5-41: V-I CURVES FOR OHMIC AND NON-OHMIC DEVICES

Illustrate resistive properties of resistors and diodes Read More
• #### K5-42: TRANSISTOR

Demonstrate a transistor circuit Read More
• #### K5-43: NON-OHMIC DEVICE - V VS. I

Demonstrates the non-linearity of the V vs I curve for a diode Read More
• #### K5-44: NON-OHMIC DEVICE - LIGHT BULB

Show the change in resistance of a light bulb with temperature Read More