Basic Level
- Practical case: DC motor control with a transistor
Level: Basic – Learn to use an NPN transistor as a switch to drive a DC motor, including the use of a flyback diode.## Objective and use caseIn this… - Practical case: Vault Lock with Delay and Power DriveMaster Analog Electronics by building a secure lock. Use a Transistor circuit to trigger a solenoid only when two keys turn, holding the signal for 5 seconds.
- Practical case: The Undefined Logic Level DangerMaster Analog Electronics by analyzing unstable logic states. Learn how internal Transistor behavior causes shoot-through current and flickering LED outputs.
- Practical case: NPN Switch Saturation TroubleshootingMaster Analog Electronics by fixing a flawed NPN Transistor switch. Diagnose dim LEDs and high Vce voltage, then correct bias to achieve full saturation.
- Practical case: Comparing BJT and MOSFET SwitchesMaster Analog Electronics by building two Transistor switching circuits. Compare BJT and MOSFET efficiency by measuring real input currents and voltage drops.
- Practical case: Low-Side Transistor Relay SwitchMaster Analog Electronics by building a relay driver circuit. Use an NPN Transistor to safely switch high-voltage loads and protect logic chips from spikes.
- Practical case: Intrusion alarm by wire breakMaster Analog Electronics by building a wire-cut alarm. Learn how a Transistor switch triggers an LED instantly when a security loop is broken.
- Practical case: Slow turn-off timerMaster Analog Electronics by building a fade-out LED circuit. Use a Transistor and capacitor to create a 5-second delay timer that mimics car interior lighting.
- Practical case: Simple audio amplifierMaster Analog Electronics by building a Class A amplifier. Use an NPN Transistor to boost weak audio signals and observe voltage gain with phase inversion.
- Practical case: The transistor as a light switchMaster Analog Electronics by building a Transistor switch circuit. Learn to control high-current loads like LEDs and measure saturation voltage drops.
