Author Topic: $20 LCR ESR Transistor checker project (Read 3451263 times)

montyx · « **Reply #6100 on:** February 04, 2020, 08:53:46 pm »

Hello guys!

I'd tried to read the whole topic, but it's not so easy to find the answer for my question. Which version is the most supported and best to buy from the Aliexpress vesion of the LCR testers?
- LCR T1-7
- LCR TC1
- LCR TC-T7H

Thanks in advance for every help

madires · « **Reply #6101 on:** February 04, 2020, 09:31:59 pm »

Those clones have an additional MCU for managing power and the test button. You would have to reprogram that MCU or replace it with a small circuit to be able to run the open source firmwares. There are also reports about hardware issues with the power circuitry, e.g. shorted MLCCs.

montyx · « **Reply #6102 on:** February 04, 2020, 11:09:42 pm »

Thanks for the update. In that case which other device that you'd advice? There are many supported devices based on the SVN repo. If it's possible I try to keep the budget below $20

madires · « **Reply #6103 on:** February 05, 2020, 01:57:01 pm »

An AY-AT clone is still a good choice, and the Hiland M644 comes with several hardware options.

Andbro · « **Reply #6104 on:** February 06, 2020, 02:44:32 pm »

Hi,

Who could share the .HEX, .eep and Makefile files compiled Markus V1.38 for a TC7 or TC1.

Thank

Pukker · « **Reply #6105 on:** February 06, 2020, 06:48:41 pm »

Question after stupid mistake.
I have an DTU-1701 and was happy with it.
Programmed a few times new firmware with TL866ACS,
that worked fine.
Now I wanted to update the software and I've forgotten
to set the flags. Stupid me.
Programming went fine and the unit has the new software.
But it is extemely slow. I think the Xtal is switched of.
Problem now is, I can't reprogram, because my TL866ACS
doesn't see the chip. Can't read the chip ID and can't reprogram.

Please does anyone have an solution for me?
Thanks for reading first.

Is replace an new chip an option?
Have not much knowledge of microcontroller,
but replacing the chip I can.

madires · « **Reply #6106 on:** February 06, 2020, 09:30:44 pm »

If the programmer can't read the chip ID anymore something went very wrong with the fuse bits. To recover the MCU you would need a programmer supporting the ATmega's HV programming mode. The other option is to replace the ATmega. with a new one.

Pukker · « **Reply #6107 on:** February 06, 2020, 10:19:13 pm »

Thanks for reply Madires.
A programmer with HV programming mode is not an option
I think. a. the price, b. the work c. can this be done in ICSP mode?
Thats no option
Yes, a new chip should be the option.
or, buy a new unit.
They cost not the price of a new car.

Thanks.

indman · « **Reply #6108 on:** February 07, 2020, 06:34:01 am »

Pukker, TL866A is a smart programmer that supports several programming modes, including HV.
Check again if the ICSP interface is connected correctly to the board and if the Vcc voltage is applied to the ATMega328?
You can remove the ATMega328 chip from the tester board and if you have a tqfp32 zif socket to DIP28 adapter, the TL866 can reset the fuse state to factory settings in HV mode.

Pukker · « **Reply #6109 on:** February 07, 2020, 01:41:03 pm »

Hooray.
My DTU-1701 is working again.
Couldn't access with my TL866A programmer.
Thinking Pukker, once you bought an USBasp.
With Extreme Burner software, hardware setting: Speed 500hz,
programming went fine.
Why, I don't know, but it worked.
Tested again with TL866A and that is working OK.
Happy me.
Unit works fine.

Madires and Indman, thanks for thinking with me,
much appreciated.

Indman, tqfp32 zif socket to DIP28 adapter,
haha, maybe in spare for later. Thanks.

elf · « **Reply #6110 on:** February 09, 2020, 09:54:26 am »

Quote from: montyx on February 04, 2020, 08:53:46 pm

Hello guys!

I'd tried to read the whole topic, but it's not so easy to find the answer for my question. Which version is the most supported and best to buy from the Aliexpress vesion of the LCR testers?
- LCR T1-7
- LCR TC1
- LCR TC-T7H

Thanks in advance for every help

Chinese TC-1 works fine with that firmware but need some corrections. For correct operation also need reprogram U4 with this firmware: https://github.com/atar-axis/tc1-u4 or modify schematic, remove U4 completly and add two transistors instead. I can share my firmware
Modify message

elf · « **Reply #6111 on:** February 09, 2020, 09:55:39 am »

Quote from: Andbro on February 06, 2020, 02:44:32 pm

Hi,

Who could share the .HEX, .eep and Makefile files compiled Markus V1.38 for a TC7 or TC1.

Thank

I can share 1.34m .eep and .hex russian language. Some later i will try build 1.38 english.

indman · « **Reply #6112 on:** February 09, 2020, 12:18:55 pm »

Quote from: montyx on February 04, 2020, 08:53:46 pm

Hello guys!

I'd tried to read the whole topic, but it's not so easy to find the answer for my question. Which version is the most supported and best to buy from the Aliexpress vesion of the LCR testers?
- LCR T1-7
- LCR TC1
- LCR TC-T7H

I collected some more information about Chinese products:
So:
1. LCR-TC1 is a color TFT display with resolution of 160x128 pixels.
The processor is ATMega324, but newer models of this clone already use the ATMega644 processor. The factory original firmware can be replaced with an alternative m-firmware(madires).
2. LCR-T7 - there are variants of this clone with both colour TFT display and black and white. The display resolution can be different - 128x64 in black and white, 128x128 and 160x128 - in color.
The factory original firmware can be replaced with an alternative m-firmware so far only for displays with a 6-pin interface to the base board.
3.LCR-T7H is a 128x128 pixel color TFT display. The processor is ATMega644. The device circuit was slightly changed - the Chinese used the DC-DC variant on the MT3608 (B628x) chip instead of the transformer voltage https://www.olimex.com/Products/Breadboarding/BB-PWR-3608/resources/MT3608.pdf
The new board modification was marked T7-Plus v0.1.
The photo of the board and the schematic diagram are provided by one of the participants Vrtp.ru the Russian-language forum, and are attached to my message. Clones of LCR-TC1 may be provided with the same modified boards. Please check with the seller for this information.

madires · « **Reply #6113 on:** February 09, 2020, 01:40:13 pm »

Do you know the LCD controllers of the other displays used by the T7? The TC1's 160x128 color display is a ST7735.

madires · « **Reply #6114 on:** February 09, 2020, 01:57:07 pm »

Bohu is working on adding more east European characters to all fonts based on ISO 8859-2. So we are looking for users from those countries who like to provide language specific texts in their mother tongue, i.e. Albanian, Hungarian, Polish, Slovak and so on.

montyx · « **Reply #6115 on:** February 09, 2020, 10:11:00 pm »

Maybe I can help with the Hungarian language, if it's not a very huge project

elf · « **Reply #6116 on:** February 10, 2020, 04:35:20 am »

If anybody want 1.34m russian and 1.38m english firmware for chinese LCR-TC: https://yadi.sk/d/Ebxj49EvD5zmEg

madires · « **Reply #6117 on:** February 10, 2020, 10:36:23 am »

Quote from: montyx on February 09, 2020, 10:11:00 pm

Maybe I can help with the Hungarian language, if it's not a very huge project

It's a tiny project. The first task is to take var_english.h and translate the text using the ISO 8859-2 character set. Later on when Bohu has done the fonts, the second task is to check if texts and characters are displayed correctly.

montyx · « **Reply #6118 on:** February 11, 2020, 10:34:32 am »

Do you have any translating project, or just use the git for the updates?
Can you provide a link, where can I review the text files?

madires · « **Reply #6119 on:** February 11, 2020, 11:10:19 am »

Please download the latest m-firmware (https://github.com/madires/Transistortester-Warehouse/tree/master/Firmware/m-firmware), uncompress the archive, edit var_english.h (using the ISO 8859-2 character set), save it as var_<my language>.h and send me a copy. I'll add your var_<my language>.h to the source and send you a beta version for testing when Bohu has finished the fonts.

BTW, the languages covered by ISO 8859-2 (Latin-2) are:
- Albanian
- Bosnian
- Croatian
- Czech (done)
- German (done)
- Hungarian
- Polish (Jacon)
- Romanian (Dumidan)
- Serbian Latin
- Slovak
- Slovene
- Upper Sorbian
- Lower Sorbian
- Turkmen

I'll keep this list updated.

Update: Bohu has finished the fonts. So I'm waiting for your var_<my language>.h files.

montyx · « **Reply #6120 on:** February 12, 2020, 07:09:31 pm »

On the weekend, I'm going to check it

Andbro · « **Reply #6121 on:** February 13, 2020, 12:35:34 pm »

Hi,

After 245 pages, i'm asking to me again this question "Witch is the better

"
You have the new T7H. Is it better than the TC1 end the T7. You have again the ST15F104W .........
Many talk about the Hiland M644 is the better.

Thanks

madires · « **Reply #6122 on:** February 13, 2020, 02:48:26 pm »

The Hiland M644 comes with the extended frequency counter (low frequency crystal, high frequency crystal, signal input without buffer) but skimps on bypass caps. The TC-x have a nice case with a LiPo battery. On the other side, there are several reports about shorted MLCCs and other issues in the power supply circuitry. My guess is that it depends on which components the manufacturer got from Shenzhen that day. No idea if the T7H has the same issues (no feedback yet). And of course, the ST15F104W is a nuisance. So neither tester is better, though you might prefer one over the other.

junandaaa · « **Reply #6123 on:** February 15, 2020, 01:13:13 pm »

heey thank you for shared the firmware eng 1.38, I also really need it too

btw can you teach me how to get eeprom files? I tried to make a file using winavr, but only got the hex file. how to get the eeprom file?
I want to learn hehe

VEGETA · « **Reply #6124 on:** February 15, 2020, 08:08:09 pm »

which one we should buy today? in order to get the best version ever and to get the good firmware


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Author Topic: $20 LCR ESR Transistor checker project (Read 3451263 times)

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