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Oscilloscope testing module (huntron circuit)

Circuit diagram

I call this the "huntron circuit" because a company by that name made a similar device. It is useful for trouble-shooting. I used it with digital PC boards where I did not have a schematic, or even know how it worked. I recorded the patterns found on a good board and compared them with the patterns from a defective board. Any low power 12 volt transformer will work, the resistors are watt.

author: Russell Kincaid
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web site: http://www.electronics-lab.com
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