ORIGINAL: KLXMASTER14
Derfly,
I am glad to hear that you made one, and that it works. Most likely I made a dumb mistake. I downloaded the data sheet for the part, but I need to sit down and go over everything again. I am only getting 10 volts at the output terminals. Electronics is not my strong skill area, mostly high school level training and learn-by-osomosis. This is kind of funny, considering that I work in the electronics field (as a mechanical designer). Thanks for the tip, I will perservere and get it going here soon.
Best regards,
Robert
I couldn't find the specified Triac when I built this so substituted a BT137 rated at 500V/8A. This device is way overated for the transformer I'm using which is 11.8V 50VA. As this transformer was quite a bit smaller than the original specification, I left out the Hi/Lo switch in the circuit as it really isn't needed and just complicates things.
That said, my version of the foam cutting power supply is adequate for a clean cut with a 30" bow. I wouldn't want to try anything larger than that.
Here's a quick pic of the innards.