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OCAU News |
I updated the Rheobus Review to reflect the fact that the price dropped from $125 to $119 before the review was published.
Also, some info from Tom that answers one of the questions I had about the unit (namely, the exact reason for needing the large heatsinks): The potentiometer (aka pots) are used to control transistors. If you were to try to run a fan motor with just the the pot shown on the the rheobus, it would die. The transistor has two jobs in this setup. First, it varies the voltage out to the fans. Second, it ramps up the current. If a transistor was just used to control voltage, there would be no need for a heat sink. The transistors on the board have the "hefty heatsinks" because they are amplifying the current out to the fans. Thus, there is alot of power running through the little transistors.
Finally, here's another pic of the unit in action.. I took a bunch and quite liked this one but couldn't find anywhere to use it in the review. It's the same as the other "cover" shot but with no flash:
click to enlarge
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