Slide 1 CHAPTER 3 Analog and Digital Electronics LED Light emitting diode Semiconductor Has polarity LED Requires 1 5~2 5V and 10 mA To prevent overloading, use resistor 470 Ω Optocouplers [.]
CHAPTER Analog and Digital Electronics LED Light-emitting diode Semiconductor Has polarity LED Requires 1.5~2.5V and 10 mA To prevent overloading, use resistor 470 Ω Optocouplers LED for emitter Air as barrier for isolation Phototransistor for detector DC Optocouplers Applications Applications Amplifier – Transistor BJT https://www.youtube.com/watch?v=XT0M6e1PGc g FET https://www.youtube.com/watch?v=vJuyElsbQ-A https://www.youtube.com/watch?v=2d7UJ4fd96w Motor driver Potentialmeter and MOSFET https://www.youtube.com/watch?v=ipiDHD4YEM M H–bridge https://www.youtube.com/watch?v=iYafyPZ15g8 H-bridge PWM https://www.youtube.com/watch?v=P85Ntjue7F0 OP–AMP OPerational AMPlifier OP–AMP Extremely high open–loop gain (A > 100.000) vout = A(v+ – v–) Very high input impedances (Rin ∼ MΩ) and fairly low output impedances (Rout ∼ 50 – 70 Ω) OP–AMP Ideal Op–Amp ◦ A=∞ ⇒ v+ = v– ◦ Rin = ∞ ⇒ i+ = = i– ◦ Rout = OP–AMP OP–AMP Comparative circuit OP–AMP Repeater OP–AMP Repeater OP–AMP Amplifiers OP–AMP Instrumentation amplifier