The EB-190 is a single board, instructional nodule designed to teach basic concepts in automotive electricity and electronics to technology students.

The module can be operated as a stand-alone unit or integrated into the EB-2000 Computer Managed Laboratory.

Objectives

• Understand how the resistance in electrical circuits affects the voltage across the load

• Know to use the VOM for the measurement of voltage drop in series circuits

• Become familiar with Incandescent lamps in general and automotive bulbs in particular

• Understand the difference between the incandescent lamp cold and hot resistance

• Understand what happens when lamps of unequal power rating are connected in series

• Become familiar with a typical connection of direction indicator lamps

• Know how headlight circuits work

• Know what happens when a headlamp ground connection is open

• Know the advantages of using relays for simple switching functions

• Know how to use relays for inserting or bypassing elements in electrical circuits

• Know how to measure relay's pickup and dropout voltage

• Understand why headlight circuits use relays and understand the circuit operation

• Know how latching circuits operate

• Know applications of latching techniques In automotive circuits

• Know how you can delay the pickup or dropout of a relay

• Be familiar with the use of delay circuits for slow, repetitive activation of a relay (flasher action)

• Become familiar with a typical stoplights control and monitoring circuit.

• Know the function of a flasher circuit

• Set up and operate a capacitor flasher circuit.

• Know the function of the direction indicator system

• Understand the operation of an integrated circuit based direction indicator system

• Know how hazard warning systems operate

• Know how diodes are used in suppressing high voltage spikes when switching inductive loads

• Understand the operation of acoustic "lights on" warning circuits

• Know how diodes are used for circuit isolation in automotive electrical systems

• Know how thernistors are used in the "internal heating" mode

• Know how thermistors are used in basic thermometer circuits

• Know how thermistors are used in "Half Bridge thermometer circuits

• Know how thermistors are used in automotive systems control circuits (where temperature changes are indicated by the voltage across a thermistor)

• Know how to check opening and closing temperature of thermal switches

• Know how thermal switches are used in engine coolant temperature control circuits

• Know how potentiometers are used for sensing angular displacement

• Become familiar with troubleshooting techniques in electric/electronic circuits

• Be able to detect and diagnose faults in a turn signal indicator system

• Be able to detect and diagnose faults in a temperature control system

Recommended Experiments

1. Voltage Drop in Series Circuits.

2. Incandescent Lamps.

3. Headlight Circuits.

4. Relays-General Principles.

5. Relays in Headlight Circuits.

6. Relay Latching Circuits.

7. Relay Delay Circuits.

8. Stop Light Circuit.

9. Capacitor-type Flasher Relay.

10. Turn Signal

11. Hazard Warning Systems.

12. Back Voltage Spike Suppression.

13. Use of Diodes in "Lights-On" Warning Circuits.

14. Use of Diodes for Circuit Separation.

15. The Thermistor in Automotive Circuits.

16. Thermal Switches in Automotive Circuits.

17. Measuring Angular Displacement with a Potentiometer.

18. Troubleshooting.