 | | Re: Help with converting voltage on circuit board
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(...) Hi Danny, If we supply +12V to the top of the transistors, the drive circuit will most likely not be able to block those transistors completely (unless said drive circuit has an open collector structure with a pull up to the emitter of the (...) (18 years ago, 11-Apr-06, to lugnet.robotics, lugnet.technic)
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| | Re: Request for info on the Control Lab Interface.
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Just today I got one of these from an eBay auction, including the original cable in a sealed plastic bag. The ROBOLAB software wasn't included, however, so I imagine that I'll need a driver of some kind to use it. Does anyone have a driver? (This (...) (18 years ago, 11-Apr-06, to lugnet.robotics, lugnet.technic, FTX)
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| | Re: Scissor Lift in LEGO?
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(...) Update: I ended up using string and it worked beautifully! Well, it has weight distribution issues (one side goes up before the other) but I'll work on that later... (18 years ago, 10-Apr-06, to lugnet.technic, FTX)
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| | Re: Help with converting voltage on circuit board
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(...) Thanks Dustin, those will help. I am inclined to agree with Philippe Hurbaine on the regulator. It is also obvious that it can take AC from the full wave rectifier near the power port. In answer to Davids question about the 4v connector (using (...) (18 years ago, 8-Apr-06, to lugnet.robotics, lugnet.technic)
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| | Re: Help with converting voltage on circuit board
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(...) The BDX34 transistor + toroidal inductor above + LM339 comparator probably compose a switching regulator efficiently converting 13V input power to 4.5V for the outputs. Philo (18 years ago, 8-Apr-06, to lugnet.robotics, lugnet.technic)
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