At 09:28 AM 7/12/01 -0400, you wrote:
>how do these work and what are they?  I have 25 2N6027's which are
programmable UJT's.

They are a special type of low-power thyristor designed for timing
circuits. I used
to use tons of them ages ago in industrial timer module designs.

http://www.onsemi.com/pub/Collateral/2N6027-D.PDF

Have a gander at figure 3/8, that's how they are normally used. The pulse
across
the 20R resistor in fig 3 can be used to trigger an SCR or whatever.

Best regards,

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