| 51: Solenoids: Creating Linear Movement with an Electro-Magnet | $4.99000 | 
          
                  | 52: Solenoid Operated Electro-Mechanical Relay | $4.99000 | 
          
                  | 53: Solenoid Operated Air Valves and Solenoid Type Electronic Fuel Injectors | $4.99000 | 
          
                  | 54: Creating Electricity with Magnetism (FREE for Members) | $0.00000 | 
          
                  | 55: Generators | $4.99000 | 
          
                  | 56: Alternating Current (AC) | $4.99000 | 
          
                  | 57: Alternating Current: The Change from Positive to Negative | $4.99000 | 
          
                  | 58: Peak to Peak Voltage and Alternating Frequency | $4.99000 | 
          
                  | 59: Direct Current (DC) | $4.99000 | 
          
                  | 60: Generating Direct Current: Dynamos and Alternators | $4.99000 | 
          
                  | 61: Induced Voltage Sensors | $4.99000 | 
          
                  | Audi Engine Management - Fuel Systems - Fuel Tanks | Free! | 
          
                  | Audi Engine Management 01 - Elements of Combustion | $4.99000 | 
          
                  | Audi Engine Management 02 - Principles of Engine Operation | $4.99000 | 
          
                  | Audi Engine Management 10 - Input Signal Types: Switches, Thermistors and Variable Resistors | $4.99000 | 
          
                  | Audi Engine Management 11 - Input Signal Types: Voltage Generating Sensors | $4.99000 | 
          
                  | Audi Engine Management 12 - Output Signal Types | $4.99000 | 
          
                  | Audi Engine Management 13 - DTC Generation and Different Fault types | $4.99000 | 
          
                  | Audi Engine Management 14 - DTC Diagnostics and No-Code Diagnostics | $4.99000 | 
          
                  | Audi Engine Management 15 - Readiness Codes | $4.99000 | 
          
                  | Audi Engine Management 16 - Engine Coolant Temperature Sensor, Intake Air Temperature Sensor | $4.99000 | 
          
                  | Audi Engine Management 17 - Mass Air Flow Sensor, Manifold Air Pressure Sensor | $4.99000 | 
          
                  | Audi Engine Management 18 - Fuel Injector Overview | $4.99000 | 
          
                  | Audi Engine Management 19 - Fuel Injector Types and Operation | $4.99000 | 
          
                  | Audi Engine Management 21 - Accelerator Pedal Module, Throttle Valve Control Module | $4.99000 |