Dear Dr. Dawg,
Sorry for posting something a little obscure. IGBT's or Insulated Gate Bipolar Transistors, are fast acting high power semiconductor switches. The units I have are capable of switching 200 amps at 1200 Volts at a significantly high switching rate. This is what makes it possible to use pulse width modulation to turn the switches off and on really fast to generate a variable alternating current output from a dc source, like a big battery pack.
And if anyone knows how to use the timers directly on a Sanguino, please send me a note.
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