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Design Engineering 1.3 Electronics Home Lab 2 Explained Electronic Circuits Peter Cheung Department of Electrical & Electronic Engineering Imperial College London URL: www.ee.ic.ac.uk/pcheung/teaching/DE1_EE/ E-mail:


  1. Design Engineering 1.3 – Electronics Home Lab 2 Explained Electronic Circuits Peter Cheung Department of Electrical & Electronic Engineering Imperial College London URL: www.ee.ic.ac.uk/pcheung/teaching/DE1_EE/ E-mail: p.cheung@imperial.ac.uk PYKC 26 May 2020 Lab 2 Explained Slide 1 DE 1.3 - Electronics 1

  2. Experimental Setup ◆ You will be using the function generator to produce a digital waveform or a sine wave as the voltage source at different frequencies to drive your circuits. ◆ You will build your circuits on the breadboard. ◆ You will measure the voltages on your circuits using the scope or using a multimeter. ◆ You may want to use male end of ribbon cable to loosen contacts before inserting a component or a hookup wire. PYKC 26 May 2020 Lab 2 Explained Slide 2 DE 1.3 - Electronics 1

  3. Task 1: Calibrating the DC voltage source Analogue signals: DC, SINE, Exponential, NOISY ◆ Digital signals: CLOCK, PWM, UARTModern digital circuits use lower ◆ voltages. We will be using digital circuits operating at 3.3v level. In Task 1, you calibrate the DC source by finding out the measured voltage ◆ vs the voltage settings: 2.86 -4% 3.18 PYKC 26 May 2020 Lab 2 Explained Slide 3 DE 1.3 - Electronics 1

  4. Task 2: Source resistance 3.18 1.93 Rs 2.09 1.7 + Vs 1.02 1.0 - 1.93 37.7 28.4mA PYKC 26 May 2020 Lab 2 Explained Slide 4 DE 1.3 - Electronics 1

  5. Task 3: Voltage Divider Circuit PYKC 26 May 2020 Lab 2 Explained Slide 5 DE 1.3 - Electronics 1

  6. Task 4: Thevenin Equivalent Circuit PYKC 26 May 2020 Lab 2 Explained Slide 6 DE 1.3 - Electronics 1

  7. Task 5: Complex Resistor Network PYKC 26 May 2020 Lab 2 Explained Slide 7 DE 1.3 - Electronics 1

  8. Task 6: RC circuits & Exponential signal PYKC 26 May 2020 Lab 2 Explained Slide 8 DE 1.3 - Electronics 1

  9. Task 7: RC circuits – lowpass filter Gain (dB) 20log 10 (V O /V S ) -20dB/decade Corner frequency f C PYKC 26 May 2020 Lab 2 Explained Slide 9 DE 1.3 - Electronics 1

  10. Task 8: PWM signal & lowpass filter PYKC 26 May 2020 Lab 2 Explained Slide 10 DE 1.3 - Electronics 1

  11. Task 9: PWM & LED brightness PYKC 26 May 2020 Lab 2 Explained Slide 11 DE 1.3 - Electronics 1

  12. Task 10: CR circuit & DC blocking PYKC 26 May 2020 Lab 2 Explained Slide 12 DE 1.3 - Electronics 1

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