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university:courses:electronics:electronics-lab-26 [29 Oct 2012 18:43]
Doug Mercer created
university:courses:electronics:electronics-lab-26 [05 Mar 2019 10:57]
Antoniu Miclaus [Questions:]
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 ===== Materials: ===== ===== Materials: =====
-Analog Discovery Instrument\\+ADALM2000 Active Learning Module\\
 Solder-less Breadboard\\ Solder-less Breadboard\\
-1 - 1KΩ Resistor (R<​sub>​S</​sub>​)\\ +1 - 1KΩ Resistor (R<​sub>​S</​sub>​)\\ 
-1 - 5KΩ Variable resistor, potentiometer (R<​sub>​L</​sub>​)\\+1 - 5KΩ Variable resistor, potentiometer (R<​sub>​L</​sub>​)\\
 1 - Zener diode (1N4735 or similar)\\ 1 - Zener diode (1N4735 or similar)\\
  
 ===== 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:
  
-1. Monitor and report the load voltage V<​sub>​L</​sub>​ by using the Waveforms ​Voltmeter instrument to measure V<​sub>​L</​sub>​ for R<​sub>​L</​sub>​ equal to:\\ +{{ :​university:​courses:​electronics:​zener_reg-bb.png |}} 
-(a) Open circuit\\ + 
-(b) 10 k\\ +<WRAP centeralign>​ Figure 2 Zener Diode regulator Breadboard Circuit </​WRAP>​ 
-(c) 1 k\\ + 
-(d) 100\\ +===== Procedure: ===== 
-2. Replace the load R<​sub>​L</​sub>​ with a 5Kpotentiometer,​ 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>?​+ 
 +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\\ 
 +{{ :​university:​courses:​electronics:​zener_reg-wav1.png |}} 
 +<WRAP centeralign>​ Figure 3 R<​sub>​L</​sub>​ = Open Circuit Zener Diode regulator waveform </​WRAP>​ 
 +  * 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\\ 
 +{{ :​university:​courses:​electronics:​zener_reg-wav3.png |}} 
 +<WRAP centeralign>​ Figure 5 R<​sub>​L</​sub>​ = 1kΩ Zener Diode regulator waveform </​WRAP>​ 
 +  * 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>?​
  
 ===== Questions: ===== ===== Questions: =====
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 Add questions here: Add questions here:
 +
 +<WRAP round download>​
 +** Resources: **
 +  * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​zener_reg_bb | zener_reg_bb]]
 +  * LTSpice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​zener_reg_ltspice | zener_reg_ltspice]]
 +</​WRAP>​
 +===== For Further Reading =====
 +
 +Zener Diodes http://​en.wikipedia.org/​wiki/​Zener_diode
 +
 +**Return to Lab Activity [[university:​courses:​electronics:​labs|Table of Contents]]**
  
university/courses/electronics/electronics-lab-26.txt · Last modified: 25 Jun 2020 22:07 (external edit)