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university:courses:electronics:electronics-lab-26 [23 Mar 2017 15:47]
Doug Mercer [Measurements:]
university:courses:electronics:electronics-lab-26 [25 Jun 2020 22:07] (current)
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 ===== Directions: ===== ===== Directions: =====
  
-Build the circuit shown in figure 1 on your solder-less breadboard using the 1N4735 6.1 volt zener diode. Use AWG1 and the -5V Vn user supply to establish the DC supply V<​sub>​IN</​sub>​. Use various fixed and variable resistors for R<​sub>​L</​sub>​.+Build the circuit shown in figure 1 on your solder-less breadboard using the 1N4735 6.1 volt zener diode. Use AWG1 (5V constant) ​and the -5V Vn user supply to establish the DC supply V<​sub>​IN</​sub>​. Use various fixed and variable resistors for R<​sub>​L</​sub>​.
  
 {{ :​university:​courses:​electronics:​a26_f1.png?​600 |}} {{ :​university:​courses:​electronics:​a26_f1.png?​600 |}}
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 <WRAP centeralign>​ Figure 1 Zener Diode regulator </​WRAP>​ <WRAP centeralign>​ Figure 1 Zener Diode regulator </​WRAP>​
  
-===== Measurements: =====+Hardware Setup: 
 + 
 +{{ :​university:​courses:​electronics:​zener_reg-bb.png |}} 
 + 
 +<WRAP centeralign>​ Figure 2 Zener Diode regulator Breadboard Circuit </​WRAP>​ 
 + 
 +===== Procedure: =====
  
 1. Monitor and report the load voltage V<​sub>​L</​sub>​ by using the Scopy Voltmeter instrument to measure V<​sub>​L</​sub>​ for R<​sub>​L</​sub>​ equal to:\\ 1. Monitor and report the load voltage V<​sub>​L</​sub>​ by using the Scopy Voltmeter instrument to measure V<​sub>​L</​sub>​ for R<​sub>​L</​sub>​ equal to:\\
   * Open circuit\\   * Open circuit\\
 +{{ :​university:​courses:​electronics:​zener_reg-wav1.png |}}
 +<WRAP centeralign>​ Figure 3 R<​sub>​L</​sub>​ = Open Circuit Zener Diode regulator waveform </​WRAP>​
   * 10 kΩ\\   * 10 kΩ\\
 +{{ :​university:​courses:​electronics:​zener_reg-wav2.png |}}
 +<WRAP centeralign>​ Figure 4 R<​sub>​L</​sub>​ = 10kΩ Zener Diode regulator waveform </​WRAP>​
   * 1 kΩ\\   * 1 kΩ\\
 +{{ :​university:​courses:​electronics:​zener_reg-wav3.png |}}
 +<WRAP centeralign>​ Figure 5 R<​sub>​L</​sub>​ = 1kΩ Zener Diode regulator waveform </​WRAP>​
   * 100 Ω\\   * 100 Ω\\
 +{{ :​university:​courses:​electronics:​zener_reg-wav4.png |}}
 +<WRAP centeralign>​ Figure 6 R<​sub>​L</​sub>​ = 100Ω Zener Diode regulator waveform </​WRAP>​
 +
 2. Replace the load R<​sub>​L</​sub>​ with a 5KΩ potentiometer,​ and adjust the potentiometer to determine the minimum value of R<​sub>​L</​sub>​ for which V<​sub>​L</​sub>​ remains within 10% of the zener voltage V<​sub>​Z</​sub>​. Measure and report the resistance you set the potentiometer to. How does this resistance relate to the value of R<​sub>​S</​sub>?​ 2. Replace the load R<​sub>​L</​sub>​ with a 5KΩ potentiometer,​ and adjust the potentiometer to determine the minimum value of R<​sub>​L</​sub>​ for which V<​sub>​L</​sub>​ remains within 10% of the zener voltage V<​sub>​Z</​sub>​. Measure and report the resistance you set the potentiometer to. How does this resistance relate to the value of R<​sub>​S</​sub>?​
  
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 Add questions here: Add questions here:
  
 +<WRAP round download>​
 +** Resources: **
 +  * Fritzing files: [[downgit>​education_tools/​tree/​master/​m2k/​fritzing/​zener_reg_bb | zener_reg_bb]]
 +  * LTSpice files: [[downgit>​education_tools/​tree/​master/​m2k/​ltspice/​zener_reg_ltspice | zener_reg_ltspice]]
 +</​WRAP>​
 ===== For Further Reading ===== ===== For Further Reading =====
  
university/courses/electronics/electronics-lab-26.1490280421.txt.gz · Last modified: 23 Mar 2017 15:47 by Doug Mercer