i found that page after i sent the email :-P Thanks! I didnt understand how they were used though. Now i do.... Andy -- i thought they were like BJT's of FET's ----- Original Message ----- From: Spehro Pefhany To: Sent: Thursday, July 12, 2001 9:43 AM Subject: Re: [EE]: Programmable UJT transitor > 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, > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = > Spehro Pefhany --"it's the network..." "The Journey is the reward" > speff@interlog.com Info for manufacturers: http://www.trexon.com > Embedded software/hardware/analog Info for designers: http://www.speff.com > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics