I need help solving the most unusual problem for the 0-30 Vdc Stabilized Power Supply With Current Control 0.002-3 A power supply. The voltage control and current limiter work correctly, they respond to changes in the potentiometers, the led lights, etc. There is no problem while the power is on, but once the power is off, the problem starts. First off all, this problem is encountered only when the voltage output is less than 8 volts When I power off the power supply, the voltage remains stable at the output value for about 2 seconds, then QUICKLY GOES UP, exceeding 16 volts and the starts going back down until it goes to 0 volts, all in about 1 second. The measurments were made with a digital multimeter in perfect condition. I have added a switch to this project. It connects/disconnects both AC line cables from the transformer. I dont have a clue as to what may be causing this problem, and I greatly need your help. I have invested a lot of time and money into this project and would hate to see it all go to waste because of a strange problem like this.