Interesting.... I wonder when they patented that? The main reason I went to reverse is for a switchmode halogen lamp "transformer". This had a capacitive input, so a normal dimmer generated high peak currents. ----- Original Message ----- From: "Spehro Pefhany" To: Sent: Monday, February 25, 2002 4:50 AM Subject: Re: [EE]: Switching low-voltage AC > At 07:18 PM 2/24/02 +0200, you wrote: > >I made a reverse dimmer in about 1987 using an irfp450 and a 555. > > Did you publish this circuit anywhere? I've read that the reverse phase > control is patented by a theatrical dimmer company. > > 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 > 9/11 United we Stand > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body