Impedance Analyzer Build and Experiments

[steverino]

just a thought, but why not approach digilent about stocking your designs?  anybody interested in these will have to purchase an analog discovery.  maybe you could earn some $$ from your work.

[fpliuzzi]

Thanks for all of the effort you have put into this project. If a kit is made available, please count me in for one.

[jaxbird]

That sounds great, I'm in for a kit whenever they are ready. 

Thank you,
Ruairi

Thanks for all of the effort you have put into this project. If a kit is made available, please count me in for one.

Thanks, any money made on the kit will go towards getting a Red Pitaya and implementing the same functionality for this device. I saw from one of Dave's recent videos they already have some very basic impedance measurement software, but it didn't look all that great and it looked like it didn't do any calculations to include parameters beyond basic impedance, I believe I can do much better than that, also I noticed they sell their switching board at a whopping $300+, that seems very expensive.

[jaxbird]

just a thought, but why not approach digilent about stocking your designs?  anybody interested in these will have to purchase an analog discovery.  maybe you could earn some $$ from your work.

Thanks, I might try contact them to see whether they would be interested in at least featuring the project on their website, I believe the impedance analyzer solution does provide enough value to purchase the Analog Discovery purely for this purpose.

[AlfBaz]

I believe the impedance analyzer solution does provide enough value to purchase the Analog Discovery purely for this purpose.

+1 That is precisely what I have done, solely on the basis of what you have demonstrated. Put me down for a kit and as a bonus there's your excellent Audio Analyser Suite

[kridri]

Are you planning to release the software? In a kind of OSHW license?

[jaxbird]

Are you planning to release the software? In a kind of OSHW license?

Unlikely, I don't have good experience releasing open source software.

But in case I lose all interest in maintaining the project I will make the source code available and hope someone else will take over and keep it alive (unlikely to be honest, most people just butcher such projects for their own benefit)

[jaxbird]

Some kind of soft count of who is interested in a board for this project would be very helpful, if you are interested, please reply to this message, it's not binding, just to give me some idea how much I should order.

Cheers

Edit: just to be clear, I give no promises on performance.

Edit again: Don't be shy, a PM will work as well.

Open for 2 weeks, then it will probably take me a week to pack everything and 1-3 weeks shipping

[Carrington]

Some kind of soft count of who is interested in a board for this project would be very helpful, if you are interested, please reply to this message, it's not binding, just to give me some idea how much I should order.

I'm one of the lucky ones that already have one. And quite happy with the first tests (take a look below). 
Get the correct value of any of these inductors using a DE-5000 is simply impossible.

[Selectech]

Some kind of soft count of who is interested in a board for this project would be very helpful, if you are interested, please reply to this message, it's not binding, just to give me some idea how much I should order.

Cheers

Edit: just to be clear, I give no promises on performance.

Edit again: Don't be shy, a PM will work as well.

Open for 2 weeks, then it will probably take me a week to pack everything and 1-3 weeks shipping

I'd take a couple.

[kridri]

Are you planning to release the software? In a kind of OSHW license?

Unlikely, I don't have good experience releasing open source software.

But in case I lose all interest in maintaining the project I will make the source code available and hope someone else will take over and keep it alive (unlikely to be honest, most people just butcher such projects for their own benefit)

The only reason why I asked it. Is because I don't have an analog discovery but I do have an FPGA board with some adc/dac on. So I would implement an impedance analyzer on the FPGA and you're software is pretty amazing as pc software for showing the results.
But no hard feelings I will do my best and write my own GUI, but he won't be as nice as yours. 

[jaxbird]

The only reason why I asked it. Is because I don't have an analog discovery but I do have an FPGA board with some adc/dac on. So I would implement an impedance analyzer on the FPGA and you're software is pretty amazing as pc software for showing the results.
But no hard feelings I will do my best and write my own GUI, but he won't be as nice as yours. 

Like everything, if you understand, it's really not so complicated, but it does take a lot of work.

I have found this HP/Agilent/Keysight document a very helpful reference: http://cp.literature.agilent.com/litweb/pdf/5950-3000.pdf

Cheers,
Jake

[jaxbird]

Some kind of soft count of who is interested in a board for this project would be very helpful, if you are interested, please reply to this message, it's not binding, just to give me some idea how much I should order.

I'm one of the lucky ones that already have one. And quite happy with the first tests (take a look below). 
Get the correct value of any of these inductors using a DE-5000 is simply impossible.

Thanks, it's great to get some feedback on the performance at these somewhat extremely low inductance values. My testing is primarily based on the set of reference components I got from The Electrician with plots from his ~$10k Hioki analyzer.

[RandallMcRee]

Count me in for a kit.

Already have an Analog Discovery--this seems like an excellent addition to its functionality.

Question about calibration--do we need to come up with precision L,C values in order to do that?
I do have a good bench meter and frequency counter.

Thanks,
Randy

[Carrington]

Thanks, it's great to get some feedback on the performance at these somewhat extremely low inductance values. My testing is primarily based on the set of reference components I got from The Electrician with plots from his ~$10k Hioki analyzer.

Thanks to you, thanks for sharing your work.

[Carrington]

Already have an Analog Discovery--this seems like an excellent addition to its functionality.

No doubt!

Question about calibration--do we need to come up with precision L,C values in order to do that?

Nope, just a simple open/short calibration.

[kridri]

The only reason why I asked it. Is because I don't have an analog discovery but I do have an FPGA board with some adc/dac on. So I would implement an impedance analyzer on the FPGA and you're software is pretty amazing as pc software for showing the results.
But no hard feelings I will do my best and write my own GUI, but he won't be as nice as yours. 

Like everything, if you understand, it's really not so complicated, but it does take a lot of work.

I have found this HP/Agilent/Keysight document a very helpful reference: http://cp.literature.agilent.com/litweb/pdf/5950-3000.pdf

Cheers,
Jake

Hi Jake, I'm aware of the Agilent document and I have read it multiple times during the last years. I also read some service manuals from HP lcr/impedance  analyzers. There is also allot of great information written. I will keep you guys posted of my adventure with the fpga based impedance analyzer.

[casinada]

+1 for Kit 

[pmcouto]

I'm in for a kit.

[rx8pilot]

I have a pick and place machine/line and could possibly assemble a small-med batch if it is helpful.

Sent from my horrible mobile....

[ruairi]

I'm definitely in for one.

Thanks,
Ruairi

[fcb]

+1 for a kit.

[azer]

Count me in for a kit

[Wolfram]

I'm in for a kit as well.

[Fraser]

Just found this thread. I believe I had an original AD impedance analyzer evaluation board that uses this chip.

I shall have to dig it out 

Thanks for a very interesting thread 

Fraser