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Topic: ESR meter with Arduino (Read 196819 times) previous topic - next topic

onaplioachinhhang

Great ! Thanks for share !

onaplioachinhhang


DL1AKP

Hello!

I got messed up reading this whole posts...
Not perfect in english, sorry.

Can anybody tell me - or post-  the correct code for this project?
I really would like to give it a try, but don't know what changes on the original code I have to make.
And where...

Help would be nice!

Thanks! Andy

jtroutt19

IT would be nice to have A complete circuit schematic and code pack. I know there have been alot of changes since the very first post. This is a great project just unorganized. Would someone be willing to bundle all the latest up and put it in a zip file to download.

Maverik2210

yeep, it would be so cool...

Melman

IT would be nice to have A complete circuit schematic and code pack. I know there have been alot of changes since the very first post. This is a great project just unorganized. Would someone be willing to bundle all the latest up and put it in a zip file to download.
Agree!

WAC2504

... 10 downloads of the attached .zip file with code, images, schematics and PCB design...
Great ! Thanks for your share !
ไม่เก่งเท่าเค้า ต้องพยายามศึกษา ให้เก่งอย่างเค้า
ไม่ใช่ลากเค้าลงมาให้โง่เหมือนเรา.....

utesterosam

Help please, does anyone have arduino code for the original schematics? thanks

daneshvar

hi dear
please tell me,DUT connect to the wich pins of CN1?

arduino_314

#99
Nov 18, 2016, 11:29 am Last Edit: Nov 18, 2016, 11:48 am by arduino_314
This is very old thread, however I have a need to build some simple, cheap and more or less reliable ESR tester fast...

I have look and read this thread and dr. Le Hung website about ESR. Few  things I have noticed:

1. The schematic is almost identical to dr. Le Hung ESR part.
2. Notification on this forum ESR is not able to do in-circuit measurement, while dr. Le Hung device is.
3. Dr. Le Hung do not expose source (hex only for ATmega88PA) as it sold the device.
4. The 47uF discharge capacitor need to be non-polarized? This is not commonly available part easily found in local stores.

Upper force me to believe many things could be improved for this  Arduino open source version.

1. If hardware is almost identical, identical features this ESR tester should have. I.e in-circuit measurements (up to ~300mV test voltage) is possible to achieve.

2. As I'm only amateur, my knowledge in electronic is limited. However, if 47uF is jut discharge capacitor, I believe it could be used two 100uF 100V in series el. capacitors (with the diodes protection) - the circuit to make non-polarized capacitor from two polarized. This kind of capacitor configuration double its own ESR, however if it serves only to discharge it before test, this is not crucial. Even better, any, especially larger capacitors should be discharged before test in order to protect MCU.

3. The most important feature for an ESR is to have measures with at least two freq. I have not found at dr. Le Hung documentation that his device can do that as well (only measurement at 100KHz).

Anyone with more experience can elaborate about for this circuit?

If not, is there some DIY circuit with commonly available parts is proven to be able for in-circuit measurements as well as can test in at least two freq.?

Thanks in advance.


(deleted)

(deleted)

PA3CNO

#101
Apr 01, 2019, 12:41 pm Last Edit: Apr 01, 2019, 12:41 pm by PA3CNO
I improved the ESR measurement, added Capacitance measurement to the ESR measurement, and combined the code with an L-C-R meter. The meter was described in our radio club magazine: https://www.pi4raz.nl/razzies/razzies201904.pfd (Meter description is also in English).

YU5KBM

I improved the ESR measurement, added Capacitance measurement to the ESR measurement, and combined the code with an L-C-R meter. The meter was described in our radio club magazine: https://www.pi4raz.nl/razzies/razzies201904.pfd (Meter description is also in English).
Where I can find code and schematic for that? Tnx

Shummi

@PA3CNO
I looked at your design, after i changed your url to end in PDF.....and not pfd
 
I was looking for a design where the voltage was max 100mV, so you would be able to test in circuit.
I see you have changed the schottky design, to the opposite.. bugger

/J

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