 | | 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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| | Re: Help with converting voltage on circuit board
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I've taken some more detailed pictures of the circuit and the reverse side. (URL) through the manual, connections 6 and 7 are for sensors and connections 0-5 are for output (4V as labled on the cover), but you only can turn the circuit on or off. (...) (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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(...) Hi Dustin, I am an EE. Before I give you some advice, I need a bit more information about 9750 (I have never seen one in person): - I see a power jack: I assume this powers the electronic circuit, not the loads, right? What voltage is applied (...) (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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(...) Wow - I remember those, we used them at school. Now why is it that Peeron do not have an entry for it under 9750? Those are also some big old capacitors, I would be inclined to check out their ESR (a rating of their health if you like) before (...) (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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(...) I am not an EE either but I can see at least 2 things that look like voltage regulators. (18 years ago, 7-Apr-06, to lugnet.robotics, lugnet.technic)
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| | Help with converting voltage on circuit board
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I'd like to try to convert the output of the voltage on a 9750 from 4V to 12V (to control 12V trains :). I've taken a photo of the internal circuit board - my rudimentary EE knowledge leads me to be believe I need to swap out the transistors that (...) (18 years ago, 7-Apr-06, to lugnet.robotics, lugnet.technic)
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| | Re: 3747 - 2006 new variant
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(...) No. That does not work. I've been able to find only one functional difference (improvement) you can clearly see here : (URL) That square limit how deep, Technic bushes for instance, can be "studded"; preventing it also to be "angled". (...) (18 years ago, 7-Apr-06, to lugnet.parts, lugnet.technic, FTX)
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| | Body for the 8860 car chassis found on Brickshelf!
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(URL) looks awesome, also looks like he only used bricks from 1980 or earlier. (18 years ago, 1-Apr-06, to lugnet.technic)
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| | Boeing 737-400 Minifig Scale
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(...) Thanks Nathan, Sorry guys, I wanted to introduce the plane to everybody earlier, but up until now I didn’t have posting rights yet. So with no further adieu, I present to you my latest MOC, and sixth Technic Airplane... My personal greatest: (...) (18 years ago, 1-Apr-06, to lugnet.technic, lugnet.town, lugnet.space) !
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| | Re: Technic kits for 2006
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(...) It will probably be the same price as the silver champion. That's a guess, but his design looks very similar to it. I don't know when it will come out. Nathan (...) (19 years ago, 30-Mar-06, to lugnet.technic)
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