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Jul 22, 2009, 12:55 PM
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MOSFET Masters


Even with our draconian component scavenging & reuse, the dobson mount is already up to $58.12. The wood is completely stock we got 5 years ago. The MOSFETS R all from CRT's & 20 year old hard drives. Diodes came from burned out power supplies. The microprocessor is from our strategic free sample stockpile from 5 years ago. The oscillator is from Heroine2200's spare parts 8 years ago.

Our first 9 years of H bridges have been extremely inefficient BJT monsters, using op-amps to boost base voltages. They were cheap & simple. They never burned out. In the interest of dumping op-amps, we now have MOSFET H bridges on the dobson. They're very complicated & expensive. They need reverse current protection diodes. They're very efficient.
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