Zener diyot test devre şeması

guclusat

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Zener diyodu test etmek için zener geriliminden yaklaşık 10V daha yüksek bir güç kaynağına ihtiyacımız var. Zenere 1k – 4k7 arası bir direnç bağlayın ve diyot üzerindeki gerilimi ölçün. Eğer 1V’dan daha az bir gerilim ölçerseniz , zeneri ters çevirin. İki yönde de düşük veya yüksek gerilim okursanız ; zener bozulmuş demektir.

Aşağıdaki elektronik devre bir zener diyot test devresidir. Bu devre ile 56V’a kadar zener diyot test edebilirsiniz.

zener_test_devresi.png
Zener diyot test devre şeması
 

Yazar: guclusat
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guclusat

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Zener diyot test cihazı​


2015-01-08 Zener Test.jpg

Bu devre ile 56V'a kadar zener diyotlar test edilebilir. Test edilecek zener diyot gösterildiği gibi bağlanır ve iki ucuna da bir voltmetre bağlanarak zener voltajı ölçülebilir.
 

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zener-diode-meter-schematic.png

Zener Diode Meter 1V to 50V

ZENER DIODES DIFFERENT TYPES OF ENCAPSULATED AND POWER BASIS.

D and all who walk with electronics is known that the task of finding out the characteristics of certain components is at best boring, with the zener diodes happens that the quantity of values is very large and to find their Vz we have to spend some time looking a component that most of the time is very small, needing the help of the magnifying glass and learned patience and the marks of the body of the component, if not the Vz value printed on the body we can see its features and at the end as it passes almost always not the courage it takes.

Checking the status of the zener diode is usually done with a normal multimeter scale to measure diodes, this test gives us a precise idea of the state of the component, but does not give us the value Vz the zener, the zener diode tester is truly practical when we want to find out quickly the value of the zener Vz measured.
zener tester

PHOTO MOUNTED CIRCUIT BOARD FOR A PROTOTYPE

FEATURES

Mounting plate prototypes.

Supply without batteries, 230V .

Read value Digital Vz

Zener diode tester 1V to 50V

Two scales 5mA and 15mA test


ZENER TEST

As can be seen the circuit is simple, starting with a transformer with two secondary 24V are rectified and filtered to obtain a voltage of approximately 80V, followed by a voltage regulator circuit formed by (R1, R2, D1, D2 and Q1) which reduces the voltage to about 52V to avoid spending the maximum voltage limit LM317AHV integrated controller.

The LM317AHV is a high voltage version LM317T can reach a maximum of 57V. The 37V LM317T can only reach a maximum at this point where we can not confuse the component otherwise it may not last long circuit.

The setup is mounted on LM317AHV constant current generator has been added to a switch circuit (S2) in series with resistor (R4) to choose two test scales (5mA and 15mA) as power zener diode to be tested.

As usual in practical circuit design and all that really can be easily assembled with standard components, and if it can be recovered from all types of devices to reduce as far as possible the cost and environmental degradation.

The recovery of electronic components is not difficult but it is a bit laborious, but nevertheless is quite rewarding and the way we learn many things from the apparatus for which they try to recover the components.

PHOTOS OF AMENDMENTS TO SWITCHED ADAPTOR 12V, 9V FOR FEEDING THE DIGITAL PANEL METER

I have changed the voltage from 12V to 9V to power the panel meter with a small supply 0.2 A adapter-switched and it really is very easy, only needs to modify the value of the voltage divider circuit TL431 pre regulator.

resistance to replace is the one directly connected output + terminal and the source of the TL431 RFE I have put 100K LIN because the resistance to calculate the new value out 9V rare and in this way is only fair and ready.
 

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Zener diode tester​

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Parts List​

  • R1 33K ohm
  • R2 1K ohm
  • R3 47K ohm
  • R18 39 ohm
  • R19 150 ohm
  • C1 0.01uF Monolithic Ceramic
  • C2 0.1uF Monolithic Ceramic
  • C3 1uF 63V Electrolytic
  • C4 100uF 16V Electrolytic
  • L1 10mH Inductor
  • D1 1N4148 diode
  • Q1 BD679 NPN Darlington transistor
  • IC1 NE555 timer ic
  • IC5 LM1117-ADJ regulator
  • U$2 DC POWER JACK 2.1MM BARREL-TYPE PCB MOUNT
  • 6mmx6mmx17mm Tactile switch
  • 3.5mm mono panel socket and plug
 

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