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Re: Any experiences with this ESR meter circuit?
Yeah! Retiredcaps has it! That's the link to the User's Manual. I've found his product page (russian) URL in my surf history from another computer. http://www.radiodevices.ru/esr/esr4.htm
I have no affiliation with his business, nor have I evaluated one of his units (but want to!). The website is in russian, so translate.google.com first and paste this URL into a russian to english box. He says it will ship anywhere...
Or here is a direct URL through google translation into englishComment
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Re: Any experiences with this ESR meter circuit?
Preher Tech has a small write up, photos, and video of the ESR micro
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Re: Any experiences with this ESR meter circuit?
But that ESR Micro is not a kit, is it?"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: Any experiences with this ESR meter circuit?
I love mine, works very well.36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....Comment
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Re: Any experiences with this ESR meter circuit?
Hi all,
Has anyone built the mario001.de ESR meter? I'm quite interested in building it but I'm not so clear about the schematic and the attached file T3000.zip.
Can some body assist me.
1. Adjacent to the power source are two parallel circuits. The right circuit +5V is for IC5, connection to pin 1 and 8. The left one V+ is unknown and connected to pin 4 and 11. Any idea which IC is it?
2. T3000 - is this the source code and for which IC?
Thanks
http://www.mario001.de/elektronik/sc.../esrmeter.htmlComment
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Re: Any experiences with this ESR meter circuit?
It is most likely power connection to the op-amp (IC3), probably connects to the 12V rail
There is no microprocessor in that schematic, the ICL7107 is a voltage meter IC. That file is the schematic/pcb-layout file from TARGET 3000 PCB-layout program apparently2. T3000 - is this the source code and for which IC?
http://www.mario001.de/elektronik/schaltungen/esrmeter.htmlComment
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Re: Any experiences with this ESR meter circuit?
After looking more carefully at the schematic it looks like this meter is more suitable for measuring general purpose capacitors than low ESR ones, alltought I may have missed something important.
Unfortunately the page don't tell anything about the meter's usable measuring range (tought calibrating with 10 ohm resistor hints to gp caps).Comment
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Re: Any experiences with this ESR meter circuit?
Thanks Frako,
Any idea about the Russian version? Looks quite interesting although its SMD based. I would like to give it a try but unfortunately the manual is in Russian. Can't seem to find the translation. Any help is greatly appreciated.
Here is the link: -> RLC -> ESR/R/L/C/F meter (by R2-D2)Comment
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Re: Any experiences with this ESR meter circuit?
Why not use Google Translate etc?"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: Any experiences with this ESR meter circuit?
Its in PDF.
Its this file "2484______zip" in "Description"
It looks like a manual to setup and calibrate the unit. See if you can translate this Google.
http://vrtp.ru/index.php?showtopic=16397&st=220Comment
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Re: Any experiences with this ESR meter circuit?
This is a better link -> RLC -> ESR/R/L/C/F meter (by R2-D2)Comment
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Re: Any experiences with this ESR meter circuit?
If you mean that link from the other thread:
http://people.overclockers.ru/TerAbit/record7
It looks like a good circuit. That page says it can measure down to few milliohms, what is practically the lower measurement limit without taking into account capacitors capacitance and inductance.
Important things about this circuit are:
a) Four wire measurement
b) Synchronized rectification
Many ESR meters drive the capacitor with square wave, but there comes
the problem that test lead inductance causes about a microsecond wide voltage spike and ringing. Now when simple meters use simple diode rectifier it also adds this spike to the output and that swamps any little voltage generated from low ESR capacitors. Simply adding amplification does not help to measure lower resistances, becouse the spike is amplified too.
Some meters use sinewave but then the test lead inductance adds some voltage drop, I have measured it to correspond about 0.1...0.5 ohms. It is hard to zero out because the inductance varies with test lead position. Also the usual opamp precision rectifier starts to be too slow at 100kHz to work with millivolt accuracies.
This synchronous rectification used here is a clever thing. The circuit drives the capacitor with square wave, waits 3 us for ringing die off and then connects the sampling capacitor for a microsecond. Voltage on the sampling capacitor is then RC-filtered, converted to ground reference and amplified to 1 Volt/ohm output signal. Additional benefit is that the difference amplifier don't need great AC CMMR as it works with only DC voltages
Google translate makes quite good translation out of that page.Last edited by frako; 01-27-2011, 10:56 AM.Comment
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Re: Any experiences with this ESR meter circuit?
How are those probes made ?
translation: Fiberglass soldering used on both jaws of each crocodile ??
It's better than the Russian ESR / R / L / C / F Meter (by R2-D2) ?Comment
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Re: Any experiences with this ESR meter circuit?
The free viewer is available here.
http://www.abacom-online.de/uk/html/sprint-layout.htmlComment
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Re: Any experiences with this ESR meter circuit?
thats for LAY files, to view .spl7 files you need sPlan 7.0 - Viewer
A free demo version of sPlan 7.0 is also availableComment
I know it may not be a perfect link but can be copied a paste.-
Hello. Which tool is better for in-circuit testing of e-caps? I was thinking about getting proper LCR meter like DER DE5000 but as i have seen more accurate are ESR meters like ESR70 from Peak if we are measuring in-circuit. Is that true?
Sometimes ESR can not be accurate when in-circuit but still want to get the best tool for it. -
I read EBOOK of Testing Electronic Component and found that
"In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."
Is it really possible to test small ceramic disc capacitor with analogue... -
Hi,
I am repairing a ups which doesn't turn on ,it has the following ICs:
SG3525 used to drive inverter mosfets.
couple of uc3483, one for the power supply and another to drive a big mosfet at the output stage(i think the technique is called boost)
A LM358 and TL074 for control mechanism and of course the uController.
The SG3525 is shutting down every time the ups is turned on.
I want your help to know the function of LM358 and TL074 in the system.
I reverse engineered the LM358 circuit and i think that one of the block(A) is used for battery level... -
Hi friends of electronics
What you see in the video and pictures attached is the circuit for charging the batteries of a DC motor.
The problem is that this circuit cannot charge the batteries (3 1800mAH NiMH batteries) any more. When the circuit was OK, its green LEDs lit up one at a time to show that the batteries have charged more. But now that the circuit is flawed, LEDs light up as you see in the video and at the same time successive beeps are heard.
Please help me fix this circuit.
(the datasheet of the IC: https://pdf.datasheet.live/28... -
I have a faulty right VU meter.
At the poles, the DC voltage varies between 0.5 - 1.5 V
The indicator does not respond to the ohmmeter at all.
I checked
transistors Q202, Q203
capacitors
C230, C231, C412
D202 diode.
Variable resistor VR 204
T 201 coil
Anyone have an idea how to get rid of the DC voltage?...
Comment