Hi Guys
There has been enough interest generated that I will write a Part 3 detailing the regulator construction, with lots of pictures. Hopefully, Joe has not gotten tired of publishing these follow-ups.
Time is not on my side as my Mom and Dad arrive this week for their annual 2 week visit. I only get to see them once a year as they live 1200 miles away. Add to that, the fact that I just concluded a Major mod project on my MC-462A and need to write that up also. It gets the cooling efficiency down to .10c/w using my Cohesive Air Cooling setup. The key is replacing the Aluminum pins with Copper Clad Aluminum pins. Believe me, it was a "Labor of Love", or Obsession. It kinda dims there. ;D
Anyway, get the parts in the schematic from the article, including a 2K ohm Linear Taper potentiometer with a long shaft and I promise to write an article as time permits.
On wiring in the motor, as the article implies, bring the two voltage leads inside the case via a pair of banana plugs and jacks. Until you get the regulator going, just splice the two wires to a 4-pin molex connector and plug it into an unused cable from the PSU. At 5V, it only draws about 1A. You could power the motor from an external varialbe supply also. Remember, at 12V it draws 5A, so pick an appropriate supply.
Hoot
