You might be interested in transmission line theory:
http://en.wikipedia.org/wiki/Transmission_line#Applicability
For the most part (certainly, for most of the work I do as a non-RF electronics engineer), the signal frequency is low enough and the distance it has to travel is short enough that...
If you're looking for an implementation of an actual 4-input relay (i.e. a relay that switches when anyone of four inputs goes high), you can just use blocking diodes: connect each input to the anode of a diode and connect all four of the diodes together and to the relay. This'll prevent...
Are you using the transistor as a low-side switch? TO-92 packaged 2n7000s should be able to handle that load quite easily. I'd try it on a breadboard to be sure.
Transistor as a switch (because I'm too lazy to mock it up in Circuit Lab)...
I don't know your level of knowledge, but if you're asking from a signal analysis or mathematical point of view, any non-sinusoidal waveform will have harmonics because it's non-sinusoidal. As Windadct alludes to, in order to create that non-sinusoidal waveform, you need the contribution of...
I'm unfamiliar with DipTrace--is there an option to plot the schematic to a vector format like .PS or .PDF?
If you have PostScript (.PS) output of the schematic, you can then convert it to a .PDF using Adobe Acrobat (not Acrobat Reader) or PDF Creator (the free and open-source alternative)...
There's a fantastic (if graphic and NSFW) cartoon that's applicable. As there are already mods present, should I post a link, do it in spoilers, post "search for these terms", or just keep it to myself?
Is the question asking you for an implementation with generic transistors (as in your attached picture), or something involving the design of the transistors themselves (as you imply with your equations)? You can see that you don't need rail-to-rail output (Voh and Vol) and that you need to be...
Consider that the XOR of A and B can be written as:
(A OR B) AND ~(A AND B)
And recall that NOR is ~(OR) and that NAND is ~(AND) (NOT OR and NOT AND)
And that ~(~(A)) is just A
Then you can use up that exact quantity and type of gate!
I would guess that the Kill-A-Watt meter introduces enough of an in-series load (especially at such low power) that the battery lasts that much longer. It may also be that the reduced current draw doesn't tax the battery as much, allowing the battery to discharge deeper. In any case, lowered...
If you want something WYSIWYG (What You See Is What You Get--like most word processor applications) you can use LyX, which acts as a front-end to LaTeX:
http://www.lyx.org/
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The amount of current probably depends on how much resistance your plate offers and how long you're willing to wait. Unless you're degaussing the plate, you'd need to heat it to the Curie temperature (but based on the heat capacity of steel, you can figure out how...
Just to cover basics, you should look up 'Image sensor', 'Charge-coupled device', and 'Active pixel sensor' at Wikipedia.
http://en.wikipedia.org/wiki/Image_sensor
http://en.wikipedia.org/wiki/Charge-coupled_device
http://en.wikipedia.org/wiki/Active_pixel_sensor
The most common way of...
I got my old iPhone 3GS unlocked by my carrier (Telus, in Canada) for use as a travel phone (not that I've had the occasion, but for $35, I figured it'd be worth it).
In the course of my research, I came across the fact that there was a so-called factory unlock (where iTunes let's you know...
I don't mean to brow-beat, but there's an active thread (about 10 threads down at this particular moment) entitled "Does anyone know a program for creating schematics?" where you'll find a more current survey of free (or freeish) schematic-capture programs...