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Author Topic: DIY Zener Diode tester  (Read 900 times)

Offline pete

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DIY Zener Diode tester
« on: April 09, 2011, 10:47:11 AM »
share ko lang po ito  ;D

hirap naba kayo kakabasa ng code ng zener diode? ako hindi pa naman waglang burado ang code, kaya

naisip ko e share naman ito sa mga elabers


kinuha kolang ito sa psu ng may 24v (SMPS)




ito naman ang actual na voltage reading




ginawan ko ng lagayan bali naka series ang 1k sa B+


ito ang actual na reading ng zener diode 7.8vdc


ito ang actual na reading ng zener diode 8.4vdc





nakuha kolang ito sa ibang site matagal na








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DIY Zener Diode tester
« on: April 09, 2011, 10:47:11 AM »

Offline pete

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Re: DIY Zener Diode tester
« Reply #1 on: April 09, 2011, 11:48:01 AM »
hay sorry diko na nabago ang voltage reading dapat sa baba ang 8.4vdc hehehe nawala ang connection natin
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Re: DIY Zener Diode tester
« Reply #1 on: April 09, 2011, 11:48:01 AM »

Offline stcboy

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Re: DIY Zener Diode tester
« Reply #2 on: April 24, 2011, 08:52:26 PM »
Pwede ba share mo schema para masubukan at magamit din madami ako zener na di na mabasa ang marking at ilang volts supply nya bro.

Regards,
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Re: DIY Zener Diode tester
« Reply #2 on: April 24, 2011, 08:52:26 PM »

Offline pete

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Re: DIY Zener Diode tester
« Reply #3 on: April 24, 2011, 09:27:22 PM »
Quote from: stcboy on April 24, 2011, 08:52:26 PM
Pwede ba share mo schema para masubukan at magamit din madami ako zener na di na mabasa ang marking at ilang volts supply nya bro.

Regards,
series kalang ng 1k sa positve supply

pwede dito kahit 36vdc
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Re: DIY Zener Diode tester
« Reply #3 on: April 24, 2011, 09:27:22 PM »

Offline NORTH LUZON

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Re: DIY Zener Diode tester
« Reply #4 on: April 25, 2011, 02:23:58 AM »
ang galing ni master pete
pogi mo sir pete
ask ko lang,kaya ba nyang sukatin ung 91volts zener sis?
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Re: DIY Zener Diode tester
« Reply #4 on: April 25, 2011, 02:23:58 AM »

Offline pete

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Re: DIY Zener Diode tester
« Reply #5 on: April 25, 2011, 05:56:15 AM »
Quote from: 2010 Insider on April 25, 2011, 02:23:58 AM
ang galing ni master pete
pogi mo sir pete
ask ko lang,kaya ba nyang sukatin ung 91volts zener sis?
pwede sir kahit 100vdc pa basta supply mo mas mataas din hehehe at syempre kunting adjust sa resistance ng resistor
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Offline JiMmYbRaVø

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Re: DIY Zener Diode tester
« Reply #6 on: November 26, 2012, 05:03:50 PM »
master pete pwede po ba gumamit ng 12vdc supply? O 24vdc tlga ang minimum?
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Offline RiDdLeR???

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Re: DIY Zener Diode tester
« Reply #7 on: November 26, 2012, 05:09:39 PM »
^

pwede yan kaya lang kapag ang reading ay same as the supply voltage ibig sabihin either open yan or mataas sa supply voltage ang zener voltage.
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Online tony

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Re: DIY Zener Diode tester
« Reply #8 on: November 26, 2012, 05:27:40 PM »
Gawa ka ng 100volt dc supply, then gawa ka ng CCS set for about 2mA, sakop mo na testing ng maraming klase ng zener.....
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Offline ???

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Re: DIY Zener Diode tester
« Reply #9 on: November 26, 2012, 06:55:02 PM »
papogi ka muna  +1
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Offline Deantyne

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Re: DIY Zener Diode tester
« Reply #10 on: November 26, 2012, 07:09:24 PM »
sorry di ako maka-relate, ano po yong CCS set at 200mA?
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Offline RiDdLeR???

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Re: DIY Zener Diode tester
« Reply #11 on: November 26, 2012, 07:11:53 PM »
ccs = constant current source
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Offline rdpzycho

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Re: DIY Zener Diode tester
« Reply #12 on: November 26, 2012, 07:12:23 PM »
http://www.ecircuitcenter.com/Circuits_Audio_Amp/BJT%20Current_Source/BJT_Current_Source.htm

i-compute na lang sa 2mA 'yung current. 'yun kasi 'yung typical average na zenering current ng mga zener diode.
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Offline Deantyne

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Re: DIY Zener Diode tester
« Reply #13 on: November 26, 2012, 07:19:25 PM »
ok tnx po, im planning also to try this.

yong gamit ko kasi is LM555 , pinakamataas is only 30v...
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Online tony

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Re: DIY Zener Diode tester
« Reply #14 on: November 26, 2012, 07:25:12 PM »
make sure that the CCS is heatsinked just to be sure.....with a ccs, you can short out the output and nothing smokes.....and it adjusts its terminal voltage to maintain the 2mA....the voltage reading at the zener terminals will be its voltage rating...
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Offline JiMmYbRaVø

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Re: DIY Zener Diode tester
« Reply #15 on: November 26, 2012, 10:01:42 PM »
wow hindi po ako makarelate.hehe pasensya na po,wala akong aral sa mga ccs at iba pa,hindi po ako nakapag college. Vocational lang.. Ganito nalang ang gagawin ko,i will use a stepped down transformer (220v in, 110v out) at gamit ako fullwave bridge tapos 160v 1000uf ecap , ano po pwede gamiting resistor? At yun na 110vdc na ang output.. Tama po ba? Ngayon sa zener testing ,sa positive out anong value resistor gagamitin ko? At san ko ikoconnect ang negative out ng supply? Salamat sa magreply hehe
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Offline JiMmYbRaVø

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Re: DIY Zener Diode tester
« Reply #16 on: November 26, 2012, 10:06:37 PM »
pano po makagawa nung ccs with 2ma? Wala po akong idea.. Hirap tlga kapag walang aral.. Masahol pa sa nakapiring ang mata at nangangapa.. Haist
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Online tony

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Re: DIY Zener Diode tester
« Reply #17 on: November 27, 2012, 04:48:24 AM »
Quote from: jimmybravo on November 26, 2012, 10:01:42 PM
wow hindi po ako makarelate.hehe pasensya na po,wala akong aral sa mga ccs at iba pa,hindi po ako nakapag college. Vocational lang.. Ganito nalang ang gagawin ko,i will use a stepped down transformer (220v in, 110v out) at gamit ako fullwave bridge tapos 160v 1000uf ecap , ano po pwede gamiting resistor? At yun na 110vdc na ang output.. Tama po ba? Ngayon sa zener testing ,sa positive out anong value resistor gagamitin ko? At san ko ikoconnect ang negative out ng supply? Salamat sa magreply hehe

wag yan, delikado yan, makukuryente ka....kailangan isplation type traffo ang gagamitin mo, 100volts dc requires around 70volts ac, low current lang yan...
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Online TBG

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Re: DIY Zener Diode tester
« Reply #18 on: November 27, 2012, 05:27:28 AM »
pangtesting ko ng zener ay yung basic na voltage regulator na gumagamit ng isang transistor na may 1k connected sa collector to base at ang zener naman connected sa base to ground.yung input sa collector at ang output naman sa emmiter.masusukat mo ang value ng zener sa base ng tranny.
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Offline JiMmYbRaVø

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Re: DIY Zener Diode tester
« Reply #19 on: November 27, 2012, 09:37:24 AM »
thanks sa babala sir tony, pero wla po tlga ako idea.. Sis tbg pwde po ba makahinge ng diagram ng gamit mo? With components value.. Kung ok lang po sir
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Philippine Electronics Forum

Re: DIY Zener Diode tester
« Reply #19 on: November 27, 2012, 09:37:24 AM »
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