Author Topic: $20 LCR ESR Transistor checker project  (Read 1499804 times)

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Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5275 on: November 05, 2018, 06:42:21 am »
It's your decision. ;) Any specific requirements?
 

Offline farokh

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Re: $20 LCR ESR Transistor checker project
« Reply #5276 on: November 07, 2018, 11:52:05 am »
It's your decision. ;) Any specific requirements?
hello, im looking for the schematic and software for the newest version of this amazing project but there is 212 pages and almost its impossible to read all the post. please could you help me on that? i need a guid to build the newest version for 2x16 lcd and newset for graphical lcd. please send it to my email or give me a link. thank you. my email: softwarekardo@gmail.com.
could you help me please?
 

Offline CatalinaWOW

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Re: $20 LCR ESR Transistor checker project
« Reply #5277 on: November 07, 2018, 11:54:29 am »
I suggest you go to reply number 6 on page 1 and follow the link.
 

Offline timelessbeing

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Re: $20 LCR ESR Transistor checker project
« Reply #5278 on: November 07, 2018, 12:59:06 pm »
It's your decision. ;) Any specific requirements?
hello, im looking for the schematic and software for the newest version of this amazing project but there is 212 pages and almost its impossible to read all the post. please could you help me on that? i need a guid to build the newest version for 2x16 lcd and newset for graphical lcd. please send it to my email or give me a link. thank you. my email: softwarekardo@gmail.com.
could you help me please?

I suggest you wait more than 14 minutes for a reply before repeating yourself.
 

Offline farokh

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Re: $20 LCR ESR Transistor checker project
« Reply #5279 on: November 07, 2018, 01:02:02 pm »
It's your decision. ;) Any specific requirements?
hello, im looking for the schematic and software for the newest version of this amazing project but there is 212 pages and almost its impossible to read all the post. please could you help me on that? i need a guid to build the newest version for 2x16 lcd and newset for graphical lcd. please send it to my email or give me a link. thank you. my email: softwarekardo@gmail.com.
could you help me please?

I suggest you wait more than 14 minutes for a reply before repeating yourself.
thanks for your suggestion, i removed the replay!
 

Offline Willem52

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Re: $20 LCR ESR Transistor checker project
« Reply #5280 on: November 07, 2018, 08:56:46 pm »
Please look also at all the information here:
https://yadi.sk/d/yW8xa5NJgUo5z
 
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Offline Pukker

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Re: $20 LCR ESR Transistor checker project
« Reply #5281 on: November 08, 2018, 05:39:15 am »
Please look also at all the information here:
https://yadi.sk/d/yW8xa5NJgUo5z
Yes, the info there is correct, but the software there is in Russian.
Not usefull for most of us.
 

Online indman

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Re: $20 LCR ESR Transistor checker project
« Reply #5282 on: November 08, 2018, 06:01:24 pm »
Not usefull for most of us.
And what hinders to look at makefile and to change language from Russian to that language which to you native?
And then to compile a new firmware for the clone. :D
 

Offline plouc68000

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Re: $20 LCR ESR Transistor checker project
« Reply #5283 on: November 08, 2018, 06:36:24 pm »
all the software (compiled binaries in english) you find on Github here, select the right hardware/display combination :

https://github.com/svn2github/transistortester/tree/master/Software/trunk

or on SVN :

https://www.mikrocontroller.net/svnbrowser/transistortester/Software/trunk/


A 2 lines 16X2 display dont tell me enough to help you  , you should specify if its a parallel interface or I2C or SPI ?

if you want to start easy and learn with a 2 Line 2X16 with parallel, you may use the Arduino_m2560 files with a Arduino Mega....

https://github.com/svn2github/transistortester/tree/master/Software/trunk/arduino_m2560


You can find all hardware to make your TransistorTester in a Arduino starter kit like this, the 1602 display included is the 2 X 16 parallel:

https://www.ebay.com/itm/Ultimate-Starter-Kit-For-Arduino-MEGA-2560-LCD1602-Motor-LED-Relay-DIY-Set/192619118814?hash=item2cd8fe80de:rk:1:pf:0

You can then upload the binary code with the Arduino IDE.

ALL this can be done WITHOUT RECOMPILATION OF THE CODE  :-DD, I have started to learn this way ......






 
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Offline vinceroger

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Re: $20 LCR ESR Transistor checker project
« Reply #5284 on: November 11, 2018, 12:16:09 am »
Im just about to build UP a ay-at tester kit im going to use a 20mhz crystal and change the voltage regulator, just a question can these measure small value smd capacitors? if so what the lowest capacitor value reading these go down to thanks
 

Online 001

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Re: $20 LCR ESR Transistor checker project
« Reply #5285 on: November 11, 2018, 01:17:14 am »
sORRY FOR my stubid question

But can it check POWER BJTs correctly & MOSFETs?
2N3005 IRF9240 etc
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5286 on: November 11, 2018, 02:29:53 am »
Im just about to build UP a ay-at tester kit im going to use a 20mhz crystal and change the voltage regulator, just a question can these measure small value smd capacitors? if so what the lowest capacitor value reading these go down to thanks

The sampling ADC method of the k-firmware running at 16MHz can measure caps with a resolution up to about 0.01pF. The standard capacitance measurement starts at 25pF for the k-firmware and 5pF for the m-firmware.
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5287 on: November 11, 2018, 02:48:03 am »
But can it check POWER BJTs correctly & MOSFETs?
2N3005 IRF9240 etc

Yes. BTW, 2N3005 is a SCR.
 
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Online 001

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Re: $20 LCR ESR Transistor checker project
« Reply #5288 on: November 11, 2018, 04:20:05 am »
But can it check POWER BJTs correctly & MOSFETs?
2N3005 IRF9240 etc

Yes. BTW, 2N3005 is a SCR.

Sorry
 I mean 2N3050
Is hfe readings correct for it?
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5289 on: November 11, 2018, 06:25:58 am »
Yes and no. The TransistorTester uses a low test current and the hFE value will be correct for that test current. But datasheets of power BJTs state the hFE for a specific high test current usually, and it will be different for a low test current.
 
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Offline Benik3

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Re: $20 LCR ESR Transistor checker project
« Reply #5290 on: November 11, 2018, 09:51:00 am »
Hi there.

Maybe stupid question, but which HW you can recommend to buy? (around 10$, I looked on GM328A).
With support of Markus FW...

Thank you :)
 

Offline timelessbeing

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Re: $20 LCR ESR Transistor checker project
« Reply #5291 on: November 11, 2018, 11:16:55 am »
Any tester with an ATMega 328 will support Markus' firmware. Avoid the TC1 variant. I also suggest you read at least page 1 and the last 10 pages of this forum topic. Good luck.
 

Online 001

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Re: $20 LCR ESR Transistor checker project
« Reply #5292 on: November 11, 2018, 08:51:43 pm »
Yes and no. The TransistorTester uses a low test current and the hFE value will be correct for that test current. But datasheets of power BJTs state the hFE for a specific high test current usually, and it will be different for a low test current.

tHANX!

cAN yOU SAY HOW TO MEASURE POWER TRANSISTORS cORRECTLY?
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5293 on: November 11, 2018, 11:45:57 pm »
To check if the hFE of a power BJT matches the datasheet you would have to set up a simple test circuit with the currents and voltages given in the datasheet. Or if you like to know the hFE for your specific application than use those currents. For example, the 2N3055's datasheet states a hFE of 20 - 70 at an I_C of 4A and a hFE of 5 or more at an I_C of 10A. Scrolling down the datasheet you might see a diagram with I_C/hFE curves at different temperatures. hFE isn't a single "correct" value.
 
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Offline alextuning15

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Re: $20 LCR ESR Transistor checker project
« Reply #5294 on: November 12, 2018, 09:27:09 am »
Hello, greetings to all, it is a pleasure to be here in this forum, I have a tester m328 lcr-t4, only three days of use, suddenly I stop working, it does not turn on the screen. I did tests to verify what the problem would be, check the 78L05 regulator, repair a track of the circuit that was GND and had to be 5+, I made measurements to the pins of the mega 328, where it has to have 5v, it has 9v, the pins 3, 4, 5, 6, 18, 22, 23, 26 are GND.
I am a beginner in electronics, I bought the device to make things easier, but it only lasted three days, I think it is imitation of the original purchased on Aliexpress.

Excuse my English, use the Google translator. https://www.aliexpress.com/item/2016-V2-68-ESR-T4-Mega328-Digital-Transistor-Tester-Diode-Triode-Capacitance-ESR-Meter-MOS-PNP/32680013678.html?spm=a2g0s.9042311.0.0.378463c0DEZJd2


Excuse my English, use the Google translator.
 

Offline cdev

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Re: $20 LCR ESR Transistor checker project
« Reply #5295 on: November 12, 2018, 01:31:37 pm »
alextuning15, welcome!

just from looking at the picture and the fact that you didn't bring it up, I'm guessing the chip isn't socketed, right? If it is (socketed) replacing it (if its indeed blown) and replacing or repairing the voltage regulator would be fairly easy. Sounds like you are getting a good start in troubleshooting.
« Last Edit: November 12, 2018, 01:37:08 pm by cdev »
"What the large print giveth, the small print taketh away."
 

Offline alextuning15

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Re: $20 LCR ESR Transistor checker project
« Reply #5296 on: November 12, 2018, 11:06:53 pm »
Thank you for your prompt response, voltage regulator 78L05, I did the test and if you are regulating at 5 volt, something else, test that pin 18 of mega 328 is connected to GND and not 5 volt, I imagine that the track or connection is fused and that's why it's not working, I'll have to make the connection by means of an electric cable
 

Offline timelessbeing

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Re: $20 LCR ESR Transistor checker project
« Reply #5297 on: November 13, 2018, 06:55:32 am »
There have been a few reports of shorts between PCB layers. Maybe try holding it up to a strong light.
 

Offline alextuning15

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Re: $20 LCR ESR Transistor checker project
« Reply #5298 on: November 13, 2018, 11:44:25 am »
I gave up, I made tests and all the 5 volt connections are connected with GND, you are difficult of what I thought to repair the equipment, I prefer to buy another, but, I do not know if the same, to have the damaged spare or other of better quality, what do you recommend?

I have checked with backlight, to verify the PCB and I do not observe anything strange.
 

Offline Andbro

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Re: $20 LCR ESR Transistor checker project
« Reply #5299 on: November 14, 2018, 11:54:34 pm »
Hi

Is it too complex to explain?
How change the language and compile the file from Clone Ttester?

Thanks
 


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