chippie thanks for the idea but i'm actualy looking for cheaper way. since i will use this one or two time for adjusting a device.Chippie said:I use a variac for such things.........
You are quite right, stevez.stevez said:.........Unless I am mistaken (help me out guys) a simple "triac" light dimmer form of control will more or less cut off or truncate portions of the sinewave. In the strictest sense the RMS value of the voltage is reduced but you no longer have a sine wave. At about 50% the peak voltage will be the same as it is at 100% or anything betwee 50% and 100%. It's only when you start cutting off the other half of the sinewave that the peak voltage will drop.
A filament or electric heater responds well to this kind of control - motors and other circuits do not. This may or may not be significant but I thought it was worth mentioning.
That's why i visit this forum everyday and read all posts regularly.stevez said:Thanks for the support!
This is a perfect example of how, in my opinion, a forum like this works. Someone might start with a simple question and the various contributors (and the originator) build on it. This progression helps me learn or it reaffirms my learning. Non-contributors view it and hopefully they learn too. While not a substitute for a program of study (self directed, classroom, etc) is certainly helps. To the originators and moderators - nice job, thank you.