Electronics > Projects, Designs, and Technical Stuff

Building an ESR meter

(1/4) > >>

JohnS_AZ:
Hello guys,

I want to build an ESR meter and after searching the web (and this forum) have found two contenders. Analog design is not my strong suit, and was wondering if you would have an opinion between the two. One takes a wacky transformer and that's fine. My -only- concern is which one do you think would be superior in terms of accuracy/stability.

Thanks.

Option #1 http://ludens.cl/Electron/esr/esr.html

Option #2 http://members.shaw.ca/swstuff/esrmeter.html

joelby:
The Bob Parker meter seems to be fairly popular here. You can read the original article at http://members.ozemail.com.au/~bobpar/k7214.pdf . The firmware for the microcontroller doesn't seem to be available unless you buy the kit, but you could certainly have a look at the circuit diagram if you need another option to choose from.

sacherjj:

--- Quote from: joelby on April 26, 2011, 06:13:49 pm ---The Bob Parker meter seems to be fairly popular here. You can read the original article at http://members.ozemail.com.au/~bobpar/k7214.pdf . The firmware for the microcontroller doesn't seem to be available unless you buy the kit, but you could certainly have a look at the circuit diagram if you need another option to choose from.
--- End quote ---

Not getting anything from that link.

Bloch:

--- Quote from: sacherjj on April 26, 2011, 07:58:27 pm ---Not getting anything from that link.

--- End quote ---

It works fine :-)

Try right click and save.

And be sure to have a Adobe reader installed.

/Lars G

am2pgs:

--- Quote from: joelby on April 26, 2011, 06:13:49 pm ---The Bob Parker meter seems to be fairly popular here. You can read the original article at http://members.ozemail.com.au/~bobpar/k7214.pdf . The firmware for the microcontroller doesn't seem to be available unless you buy the kit, but you could certainly have a look at the circuit diagram if you need another option to choose from.


--- End quote ---


IMHO the Bob Parker approach to ESR measurement seems to be more superior. Having said that, I don't like the Analogue to Digital conversion method described. It seems too crude, complicated and prone to inaccuracies.

These days it is not that difficult to use the same measurement principle but with nice and cheap uC (like a small PIC) with a proper built in A/D.

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod