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This project finished long time ago. I posted my files here: https://vrtp.ru/index.php?showtopic=16397&st=2490
I didn't make an English manual, though. Schematics for this meter was created with older SPlan 6, which still can be found on the Internet (it has printing option included)...
Which one you're talking about? ;-) Some of them were designed specifically for in-circuit testing without desoldering, what why they are not 100KHz versions, more like as "constant current meters" (100KHz is not suitable for precise in-circuit measurements). Mentioned last on the list...
mtom, what do you mean by saying "pic program not work"?
1. Is something wrong with your PIC programmer or you're simply using wrong PIC controller? What type of programmer did you use?
2. What the schematic did you use? What PCB?
3. If that is C_ESR from GO, I cannot help much as I don't know...
To tell you "the best" free DIY meter on Internet is RLC-2 **broken link removed** .
But that project is for sure not for beginners :!:
His previous project (same author -GO) was **broken link removed**
Also very advanced meter. And this **broken link removed** was his very first project. Very...
Strange... are you sure this no error? This 10ma test was recommended by some guy at Russian forum **broken link removed** (translated), other guys did it, too, so it works... Can you double-check it? I didn't do it personally - my meter didn't have problems.
Also, this meter has a "debug"...
ICL7660 is not designed for big load (10ma tops,I think). As for checking 10ma current, here is picture. This is how it should be connected (CPU must be taken out from socket). VT2 should be temporarily disconnected from VT1 as shown.
Increasing value of R2 will reduce output current, decreasing...
No,that's not right, coefficients should be very stable. I checked settings after 2 years (!) after I made my GO meter, and nothing is changed!
Don't use ceramic resonators - they have much lesser stability comparing to quartz resonators. Also check how stable voltages +/-5V are, ICL7660 is not...
I'm not familiar with this particular PCB revision design, are you sure there is no any errors in PCB routing?
Ajusment can correct up 2 or even more times discrepancy, but that's not a good sign.
Normally, initial discrepancy shouldn't be more than 10-20% of actual value of the resistor. Let's...
Wow, very good job!
I see you used some sort of translator, though, some sentencies were translated somewhat incorrectly...
I can correct some errors, if you can convert that file into MSWord format.
That meter works nice, though, made already few of them...
The author is a good friend of mine (he even made a firmware for me), but he never shared his source code with anyone, including me (!). And I have to respect that... maybe newer hardware versions of the R2D2 meter will have separate firmware for 2550, but right now 2550 is not compatible with...
Sorry, Javed, I'm not the author of the firmware (and the author never made source code available to public). I only designed my own version of schematics (compatible with the his firmware),and PCB.
I didn't know it could be such a problem to buy a PIC controller... cann't you buy it online and...
No, it must be 18F2520. 2550 has some pins working as input only, so it won't work. 2520 is actually a bit cheaper than
2550, you can buy it from Digikey.com or from other online retailer.
Sorry, I probably misunderstood you. I thought you were asking about GO's ESR meter.
Actually, I haven't yet made public my PCB design for R2-D2 meter mostly because it needed some finising touches, found errors corrections etc. That's why that package doesn't include PCB design, only...
Sorry for delayed answer... To print out the PCB, you'll need **broken link removed** free PCB viewer. It located at the bottom of the main page Sprint-Layout
I just downloaded it and checked just in case, it works. As a demo version, it has only 2 options available - to setup printer and print...
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