$20 LCR ESR Transistor checker project

[madires]

For checking quartz crystals with the m-firmware you need the extended frequency counter (hardware option). A clone with that hardware option is the Hiland M644 for example. Or you could use the k-firmware (SamplingADC).

[alexmel]

Thank you, I will try to compile K-firmware.

[indman]

Hi!
I compiled the English firmware of m-firmware v1.37m for a clone of AY-AT(GM328A) for 3 clock rates 8,16 and 20 MHz.
Once again great gratitude of madires for its work!
The link for downloading of firmwares here in my storage
https://yadi.sk/d/yW8xa5NJgUo5z/M328Kit+TFT/Firmware/Markus Reschke/English
ATMega328 do not have enough memory any more for all options which were made by madires therefore on a photo I showed the menu of functions which were located in the processor memory.
Also I added into the storage an original firmware from a clone of LCR-TC1 which it was succeeded to read to one of participants of a forum
https://yadi.sk/d/yW8xa5NJgUo5z/LCR%20%D0%A2%D0%A1-1/Firmware/Original

[TheBay]

chansw,no, this photo will help you?

Hi indman, yes, that photo was very helpful, I was able to successfully upgrade the firmware to 1.13. As it turns out on my BSIDE ESR02 device, the header thru-holes were already present. They are V+, Gnd, Reset, SCLK, MISO, MOSI from top to bottom. In fact, I was able to program the unit without having to solder, I just inserted the header pins and applied moderate side-pressure using an elastic band to ensure a good connection, and wired up my USBASP device accordingly.

In my eagerness I neglected to backup the old 1.11 firmware, do you have a copy of the 1.11 hex and eep that you could send to me? I'd like to have it on-hand if I ever need to deal with a warranty issue.

Thank you, you have been super helpful!

Interestingly on my DTU-1701 J6 was exactly the same as yours, all pins present for programming. Where as some have different pins present there and have to tap the resistors for data lines to the MCU.
I've soldered a right angle set of headers so I can easily flash it.

I tried to use my USBASP on that header but AVRDUDE failed with an error, then the 328P Lost its Device Signature. "Device ID 00 00 00"
I managed to recover it with my TL866A ICSP, but thought I'd try again with the USBASP board and exactly the same thing happened again.

*UPDATE*
Just fitted another 328P and flashed with my USBASP and it worked fine, so no idea why it was being strange earlier, might have been manufactured with a dodgy MCU I guess!

Also, I have compiled and uploaded 1.13K Firmware and every power on it says Testing..... and displays a Capacitance reading of 700-1000nf Rather than "no, unknown or damaged component"

All tests seem to be working okay and have run the Selftest etc, capacitor readings are correct. I think it might be stray capacitance as these have multiple connections to the test ports
including the SMD Pads, which will naturally give a reading of capacitance. However the original firmware didn't do this and just said "no, unknown or damaged component"

Wondering if I have missed something when compiling the firmware or a hardware change is needed for the DTU-1701/ESR02?

[indman]

Wondering if I have missed something when compiling the firmware or a hardware change is needed for the DTU-1701/ESR02?

Show result hardware test T1-T7

[TheBay]

Wondering if I have missed something when compiling the firmware or a hardware change is needed for the DTU-1701/ESR02?

Show result hardware test T1-T7

Thanks for your reply, I actually just tried flashing the pre-compiled 1.13K firmware from your website and it does exactly the same thing.
Here are my results, put them on Gdrive as file size too big to add as attachment on here:
https://photos.app.goo.gl/ivDqj6qX6XTndt9T9

[indman]

It is not that information which I asked to show.
Read attentively the manual from Karl-Heinz and make hardware T1-T7 tests of the menu.

[TheBay]

It is not that information which I asked to show.
Read attentively the manual from Karl-Heinz and make hardware T1-T7 tests of the menu.

Yes I have read the whole manual, apologies I assumed you meant that data.

Here are the results during calibration:

https://photos.app.goo.gl/u6zxb5uL7mBXJ6Tn7

[nigelwright7557]

There seems to be a lot of these around now.
I have even seen open source projects for them.
I have a Peak one which is very good for checking components.
The only criticism is the test current is very small due to it using a PP3 battery.
I have a more expensive one that does breakdown voltages.

[indman]

Here are the results during calibration:

https://photos.app.goo.gl/u6zxb5uL7mBXJ6Tn7

Results of T3-T7 tests - they are very bad!
Check operability of resistors 470 kOhm. Also I will assume that on your board there are traces from soldering, gumboil, dirt or is badly soldered the interface for updating of a firmware. Delete it. It is necessary to look for fault. Good luck.

[TheBay]

Here are the results during calibration:

https://photos.app.goo.gl/u6zxb5uL7mBXJ6Tn7

Results of T3-T7 tests - they are very bad!
Check operability of resistors 470 kOhm. Also I will assume that on your board there are traces from soldering, gumboil, dirt or is badly soldered the interface for updating of a firmware. Delete it. It is necessary to look for fault. Good luck.

Thank you,

It's working now, I de-soldered the pin header from J6! Ran the calibration again and it's working correctly.
Just flashed the 16MHz 1.13K firmware from your site and that works perfectly now.

*UPDATE*

Just ran it again and the fault has come back, swapped the MCU for a brand new one from a different batch and still the same.
All resistors check out fine, can only assume this is a bad design and has stray capacitance as it has a lot of inputs tied together.

[indman]

All resistors check out fine, can only assume this is a bad design and has stray capacitance as it has a lot of inputs tied together.

At BSideESR02(DTU1701) quite successful design, it does not cause in other owners in work any problems.

[TheBay]

All resistors check out fine, can only assume this is a bad design and has stray capacitance as it has a lot of inputs tied together.

At BSideESR02(DTU1701) quite successful design, it does not cause in other owners in work any problems.

My DTU-1701 has a different PCB design to the ESR02 models I have seen, mine has V+, Gnd, Reset, SCLK, MISO, MOSI at J6 but the ESR02 models I have seen
only have V+, Gnd, Reset at J6 and I think 1,2,3 DUT pins are present there.

[001]

All resistors check out fine, can only assume this is a bad design and has stray capacitance as it has a lot of inputs tied together.

At BSideESR02(DTU1701) quite successful design, it does not cause in other owners in work any problems.

My DTU-1701 has a different PCB design to the ESR02 models I have seen, mine has V+, Gnd, Reset, SCLK, MISO, MOSI at J6 but the ESR02 models I have seen
only have V+, Gnd, Reset at J6 and I think 1,2,3 DUT pins are present there.

Do U has a photo?

[TheBay]

Do U has a photo?

Yes, here is a picture of the DTU-1701, you can see J6 goes to the MCU which is different to the Bside ESR02.
I think these are a cheap clone to be honest, it was only £16.

Ignore the missing caps C10/C12 I removed them for testing, also I pulled the MCU off.
On J6 I cut the traces going to the MCU as I thought that might be causing problems.

Last picture is of a BSide ESR02 that sorenkir posted on this forum, the PCB layout is different.
DTU-1701



BSide ESR02

[radit68i]

Look what happens on BSIDE ESR02 when measure not discharged electrolytic capacitor.

[TheBay]

Look what happens on BSIDE ESR02 when measure not discharged electrolytic capacitor.

Impressive hole
That would happen on any of these to be honest, unless you have input protection.

[indman]

Hi madires! 
Still I have one question on future development of the project. Whether it is possible to make additional point in the menu in order that it was possible to measure in the cyclic mode capacitors, resistors, inductance on test contacts 1-3? And that the tester updated in the cyclic mode only results of measurement and the display not to redraw? Such mode is more convenient for observation of smooth changes of results of measurements during a certain period.

[madires]

IIRC, that's already on the to-do list.

[beanflying]

Good video from Andreas and worth a watch.

[001]

Hi

My DER DE5000 reads choke as 49ohm DC and 5.6Hy
But BSIDE ESR02  says 51ohm DC and 10Hy
What I`m doing wrong?

[madires]

First you should get rid of the "y". The LCR meter uses a different method for measuring inductance than the transistor tester. Also the frequency of the test signal and the mode (serial/parallel) have an impact on the result. Have you selected the right mode for a large inductance? Anyhow, the transistor tester can't measure inductance as accurate as a proper LCR meter because of its simple design.

[001]

Have you selected the right mode for a large inductance? 

What a "large inductance mode" is? How to activate it? 

ESR02PRO is marked 0.01mH-20H on a front panel

[indman]

001, madires and i explained russian forum to you that ESR02PRO will inflate readings inductance coils for more than 1H. If these results do not suit you, then complain to ESR02PRO manufacturer.

[001]

001, madires and i explained russian forum to you that ESR02PRO will inflate readings inductance coils for more than 1H. If these results do not suit you, then complain to ESR02PRO manufacturer.

Why? I read authors manual and it says about -10% for L above 1H and  -20% for L above 10H
But I got +100% for 5H!