Re: Capacitor testers
You can find the sales literature, circuit description, and schematic for your Creative Electronics ESR meter at the following url (3 pdf files)...
[url]http://bama.edebris.com/manuals/creative/esr[/url]
Interestingly, I see that the device sold for $149.00 back in 1983.Re: Capacitor testers<br />
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fpliuzzi
Member
Last Activity: 12-26-2016, 07:39 PM
Joined: 11-16-2012
Location: Broomall, PA
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Re: Relay energised indicator?
Bogart219,
Glad you found the info I posted of some interest. The low cost, bare-bones gaussmeter adapter that I built from the EDN article has come in handy on my test bench.
Actually, I'm surprised that the link to the EDN article still works, since I posted it so long ago here. EDN.com has lots of interesting articles, but from my experiences, their site unfortunately has lots of broken links.
Regards,
FrankLeave a comment:
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Re: Multimeter cables suggest
Thanks momaka. I really do find them quite useful on my test bench....Leave a comment:
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Re: Multimeter cables suggest
I also find that it's getting more difficult to probe some of the microscopically sized components that are found on some PCBs.
I had a couple of 2mm tip jacks in my parts drawer so I shortened two sewing needles and soldered them to the leads of the tip jacks (my tip jacks look more like capacitors in the photo below). Most of the exposed needle is covered with tough translucent teflon sleeving and the tip jack itself is covered with heat-shrink sleeving.
When I slip these sharp adapters onto my DMM probe tips I find that...Leave a comment:
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Re: Just got my 50MHz differential probe, I need suggestions for extra test leads
Thanks for the link...Leave a comment:
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Re: Just got my 50MHz differential probe, I need suggestions for extra test leads
I came across two accessories made by PINTEK that may be useful to you for your newly acquired DP-50. See what you think of them...
PINTEK BP-266: HV IC Clips. These are rated to 6500V (DC + AC p-p)
PINTEK BP-366: HV banana to banana plug cables (UL20KV)
The LeCroy AP031 HV differential probe that I own can handle 1400V maximum, so my HV test cabling requirements are less stringent than yours. The test leads/probes that came with my AP031 work quite well and securely...Leave a comment:
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Re: Where to buy decent 'mini' probes ?
Hello,
Maybe you can unscrew the tip from the cracked probe, unsolder the wire from the probe tip, and cut (or file) the plastic probe's end straight across. If the threads go deep enough into the plastic probe you should be able to reattach the wire and then just screw the tip back into the slightly shortened probe.
This would at least make the probe usable until you find a replacement.
Regards.
Frank
(Photoshop image shows modded probe)...Leave a comment:
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Re: Soldering a rear window defogger clip?
Maybe your neighbor can use this electrically conductive adhesive by Permatex to repair the detached tab on his car's rear window...
[url]http://www.amazon.com/Permatex-21351-Electrically-Conductive-Defogger/dp/B000HBGKWE[/url]
(he can probablly buy it, or something similiar, at any local automotive parts store).
According to some of the Amazon reviews for the Permatex product (the informative review by G. Perrin is noteworthy) it seems that it's important to also view the related Permatex how-to...Leave a comment:
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Re: Relay energised indicator?
Hello,
The idea of checking to see if relay coils are energized, from the top side of the board only, sounds interesting. You may want to see FIGURE 1 in the following EDN article. It shows a simple to build probe that turns your digital voltmeter (that's set to dc millivolts) into a basic Gaussmeter. The probe consists of only a low cost Hall Effect sensor, two 0.01uF bypass caps, and three AAA batteries (sensor runs on 4.5V to 6Vdc).
[url]http://www.edn.com/design/test-and-measurement/4316983/Magnetic-field-probe-requires-few-components[/url]...Last edited by fpliuzzi; 10-06-2013, 09:36 PM.Leave a comment:
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Re: about ring tester usage
I'm not quite sure if you saw this article by Justine Yong...
[url]http://www.electronicrepairguide.com/blueringtesterresult.html[/url]
In it Justine states the following...
"What this tester can't do:
Generally the higher the inductance value the more LED from the tester will light up, assuming if there is no shorted turn in the winding. In other words it can be used to check on coils that have at least .3milihenry and above. If the value is lower than that then there will be less LED will light...Leave a comment:
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Re: about ring tester usage
The original "LOPT/FBT Tester" manual can be found at...
The newer "Blue Ring Tester" manual is at...
[url]https://cdn.badcaps-static.com/pdfs/965ebcb519da2930471e4093bffb49ea.pdf[/url]
Hope this helps,
FrankRe: about ring tester usage<br /> <...49ea.pdf[/url]Leave a comment:
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Re: BLue ESR meter installation pre-testing
Hello, I have the original version of Bob Parker's ESR meter, but I just downloaded this manual for the Blue ESR meter...
This version of the manual states that during the initial checks (with IC2 and IC3 not installed yet) a current-draw measurement in the range of 3mA to 5mA is perfectly fine.
Regards,
FrankLeave a comment:
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Re: would like some help regarding soldering pls
If I only had those two images to go by, the word CUT would normally signify that you should take something like an xacto knife and carefully put a cut in the thin circuit trace of the PCB that normally joins where the orange and yellow wires are to be soldered so that the two wires will not be electrically connected by that trace (and also to cut the PCB trace between where the green and purple wire are to be attached).
if there is no pad available you may be expected to solder the yellow wire directly onto the circuit...Leave a comment:
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Re: ESR meter to measure internal gate resistance of mosfet/igbt to mOhm accuracy
I too was intrigued by what AQUAMAN was trying to accomplish with his high speed in-circuit dynamic IGBT testing. I noticed that the IGBT data sheets in his original post lists the internal gate resistance of the two example devices as 1.25 ohm for one of the devices and 5 ohms for the other (test conditions F=1MHZ, Vac 25mV).
The following pdf describes a method of measuring this internal gate resistance parameter for out of circuit devices using a LCR bridge (info starts at about 25%...Last edited by fpliuzzi; 07-26-2013, 05:28 PM.Leave a comment:
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Re: anatek blue esr not working correctly
Hello,
It is a little hard for me to see in the photo, but It appears that the two capacitors (small yellow one and a larger red mylar one), that are located close to the pair of rectifier diodes, look like they each have one lead that is not soldered. You may want to rotate the board 180 degrees and resolder some of the joints that look like they have gaps in their solder joints.
Also, check for any unintended solder bridges where the traces pass very close to each other. There may be a short somewhere.
...Leave a comment:
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