As a matter of fact, I just did this very thing. I set an adjustiable power supply to exactly 4.80 volts on a digital volt meter and hooked up the geem 2000. I then adjusted the trimmer pot to get the light just to go steady. I then slowly uped the voltage a bit and the light started blinking. Then I backed off the voltage and the light went to steady again just a tad below 4.8v.


Scott