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Component tester on oscilloscopes

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GreyWoolfe:

--- Quote from: DC5AJ on February 13, 2014, 09:05:22 pm ---Alan W2AEW did a great video about component tester / octopus tester. Check it out:   It explains the circuit and shows the resulting patterns of various components, maybe it is interesting for you.

--- End quote ---

His video has prompted me to build one and it does work well.  The only cost was the transformer, I had the resistors I needed.  I made a small TH PCB and stuck it in the same enclosure that I had a dual 5VDC PS. :-+

owiecc:
I had one case where it was useful. A big component looking like a diode but not behaving like one. One way quite big resistance, the other way smaller. Diode tester did not think it is a diode. When I connected it to CT you can clearly see the diode IV curve. That was 5kV diode. Forward voltage ~3V, big leakage backwards. IMO a nice feature to have but I could live without it. CT on a Hameg HMO724. Maybe more useful in a school environment.

bsco:
I guess it could prove useful....like you said......not a necessity but I am going to go ahead and make one anyway....just to have it...I also repair control boards for a local company who does printing and this could be a help when I want to compare the signatures on IC chip pins  as I usually get more that one board of the same type...who knows...it may prove useful and if it don't then it didn't break the bank either...

Fraser:
The Huntron Tracker 1005B1S user manual may be of interest and provides a good description of use.

http://www.ko4bb.com/Manuals/11)_Stuff_Not_Sorted/4_Miscelaneous/HUNTRON/HUNTRON-1005B1S-Operator.pdf

The Service Manual provides excellent detail of the design and how the two channel switching works.

http://www.ko4bb.com/Manuals/11)_Stuff_Not_Sorted/4_Miscelaneous/HUNTRON/HUNTRON-1005B1S-Maintenance.pdf


I have bought Hameg HM203 scopes (with built in CT) for GBP20 and that makes a pretty cheap self contained component tester ! Manual, including CT usage is here:

http://www.hameg.com/downloads/man/HM203-6_english.pdf

HM203 Schematics available here:

http://elektrotanya.com/hameg_hm203-5_oscilloscope_sch.pdf/download.html

http://www.eserviceinfo.com/index.php?what=search2&searchstring=203-6

http://www.schematicsunlimited.com/h/hameg

Fraser:
More useful information from Huntron here:

http://www.huntron.com/sales-support/appnotes.htm

http://www.huntron.com/privatesales/technical/21-1217-2000sptc.pdf


Also my comments in a previous thread on the topic are here:

https://www.eevblog.com/forum/beginners/dirt-cheap-and-simple-scope-based-component-tester-curve-tracer/msg119338/#msg119338

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