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How to build a zener diode tester

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==Components==
 
==Components==
   
* S1: [[DPDT switch]], or 2x [[SPDT switch]]es
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* S1: [[SPDT switch]]
 
* S2: [[Pushbutton switch]]
 
* S2: [[Pushbutton switch]]
 
* N1: [[Neon lamp]]
 
* N1: [[Neon lamp]]
* D1,D2: 1N4004, 1A 400V [[Rectifier]]
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* D1: 1N4004, 1A 400V [[Rectifier]]
* C1,C2: [[Electrolytic Capacitor]] 100uF 200V
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* D2: 1N4004, 1A 400V Rectifier
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* C1: [[Electrolytic Capacitor]] 100uF 200V
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* C2: Electrolytic Capacitor 100uF 200V
 
* R1: 33kΩ [[Resistor]] 1/2W
 
* R1: 33kΩ [[Resistor]] 1/2W
 
* R2: 2.7kΩ Resistor 1/4W
 
* R2: 2.7kΩ Resistor 1/4W
 
* R3: 1MΩ Resistor 1/4W
 
* R3: 1MΩ Resistor 1/4W
* R4: 27kΩ Resistor 1W, or 2x 48kΩ Resistor 1/2W in parallel.
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* R4: 24kΩ Resistor 1W, or 2x 48kΩ Resistor 1/2W in parallel.
 
* R5: 48kΩ Resistor 1W, or 2x 100kΩ Resistor 1/2W in parallel.
 
* R5: 48kΩ Resistor 1W, or 2x 100kΩ Resistor 1/2W in parallel.
 
* 4x alligator clips
 
* 4x alligator clips
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