in my circuitry I have it set up like this: use a zero crossing opto triac like moc 3030 or moc 3031. this isolates the line voltage (trigger signal to power line) the trigger voltage is square wave +5vdc.@50% duty cycle. 0 volts led off-----+5vdc led fully on instantly current limit the led portion with a 330 ohm resistor. triac side of opto connects between gate and mt2 terminal of alternistor (hot wire side). look under application notes on thyristors. an1007 and such.. just becareful to connect as shown to terminals mt1-mt2. it blows up if the terminals are reversed with the triac what a mess . -----Original Message----- From: Alexandre Domingos F. Souza To: PICLIST@MITVMA.MIT.EDU Date: Wednesday, June 06, 2001 9:36 PM Subject: Re: How to control a BIG inductive load? >>check out >>www.teccor.com >>look for alternistors.... I have been using them ..they work where other >>devices have failed. > > WOW! Cheap things, if you say they work right...they seems to fit the bill. > > I need to control the power of an air conditioning with 1 and 2 HP motors. I think I gotta buy some alternistors. > > What is your experience? Just use it as a switch, and a buffer transistor to turn it on with a PIC? > > >---8<---Corte aqui---8<---- > >Alexandre Souza >taito@terra.com.br >http://planeta.terra.com.br/lazer/pinball/ > >---8<---Corte aqui---8<---- > >-- >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