I just connected my MPIII PC Interface and it does not seem to work, whats wrong?
The MPIII PC interface gets power from the serial port of the PC. However, because the optical emitters use more power for very brief periods than the PC can supply, the Interface stores energy in very large capacitors built into its circuitry. These capacitors make a total of 2 Farads, much more energy storage than conventional capacitors. Unlike batteries, these capacitors can charge and discharge over and over without wearing out, so they should never need to be replaced. But like batteries, their charge rate must be limited, and as a result it takes a little time for them to rise to operating voltage. Normally, the PC Interface is fully charged before it leaves the factory. The Interface is being charged when it is connected to the computer and the DTW program is active. Once they are charged from zero, they do not decay much over time and usage and can normally be used right away. However, their charge could decay slightly over time due to stray current leakage. For this reason, i
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