> Has anyone got a circuit for a simple and safe TENS unit?

Did you Google ??????????????
Googling with

        tens circuit

produces numerous hits

Three here

    http://www3.telus.net/chemelec/Projects/Tens/Tens.htm

    including

            http://www3.telus.net/chemelec/Projects/Tens/Tens-c.jpg

    which looks simple and as safe as any TENS unit is liable to be (ie
quite, if used sensibly)


The superb (circuit wise) Silicon Chip magazine, August 1997 design -
available as kitset from Dick Smith Electronics

        http://members.tripod.com/~kisu/

Also here

        http://www.gocs1.com/Psionics/TENS-DEVICE.htm



        RM

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