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    Need Help Alligning IR lasers

    Neat, Ante. awright
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    Schematic for capacitor discharge projection weld machine

    jhimpex, the book you really, really need is, "High Speed Pulse Technology, Volume III, Capacitor Discharge Engineering," by Frank B. A. Frungel (with umlaut over the u).
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    Need Help Alligning IR lasers

    Video cameras inherently have near IR sensitivity but optical filters are added to suppress the IR sensitivity.  I have heard of some people advising that you can remove the filter, but don't know if that is true. IR sensitive screens are available from some optical component suppliers.  I...
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    High power buck-boost DC/DC converter for wind generator

    Hi ahto:  You are lucky if you are in a wind regime providing useable winds and have space to put up a turbine.  I'm jealous. The altermative energy industry has devices called, "Maximum Power Point Tracking Converters," that may help you out.  I don't claim any particular knowledge of their...
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    I CAN'T READ THEM

    Consider building some electronics kits from one of the many kit suppliers.
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    Homemade Salinity Sensor?

    Google "conductivity meter," amd you will get a lot if information. Generally speaking, they use platimum plates to avoid corrosion and AC excitation of a full Wheatstone bridge to avoid the effect of plating on one electrode. awright
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    RPM counter that stops machine after 10 cycles

    Two ideas. 1)  This is a classical application for a Predetermining Counter.  Google "Predetermining Counter" and you will come up with dozens of manufacturers.  This is the bulletproof approach used in industry for this type of application.  You set the dials for whatever count you want. ...
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    sensitive parabolic michrophone

    konrad, you indicate in your original post that you want a parabolic mic for very close range.  The characteristic of a parabola is that it will focus all rays (optical or acoustic) originating at INFINITY to one point.  It is a special case of an ellipse, that has two finite foci. You don't...
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    230V AC to 12V DC @90 AMP

    madammim, as other posters have said, the transformer core has to be magnetically "reset" between cycles to avoid saturation of the core and resulting high currents limited only by the resistance of the wire in the primary winding.
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    need help... urgent!! plzzzzz

    Hi Ann Margareth: 1 uF at 15 or 25 volts is a very common capacitor value that you should be able to find at Radio Shack, any electronic supply store, electronic surplus store, Digikey, Mouser, or on scrap circuit boards.  But you can also substitute with little difficulty. No identification...
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