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Need Equation for PWM
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Hi, I'm not a math or electronics genius but I was wondering if anyone could provide an equation that gives amplitude (voltage) as a function of time and duty cycle for a square wave: symbolically: A (V) = f(t (sec),duty cycle (%)) perhaps also the function would include something about the initial phase (phi)......... more »
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Essay On Summers Comments On Women In Science
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In January of 2005, Harvard President Lawrence Summers delivered a speech where he speculated about the causes of the disparity in professional achievements between men and women in science/engineering. The speech provoked a firestorm of critical comments, particularly in academia, but also in the general media.... more »
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Reverse engineering masked ROMs, PLAs
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Ray Andraka wrote about reverse-engineering ASICs based on behavior vs. analyzing the mask layout: ...Speaking of such things, I have a number of old chips from which I want to extract masked ROM and PLA contents from. Since those are very regular strutures, and they in parts with single layer metal in 5 micron... more »
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Last rites declaration of Ioannes Paulus PP. II (Karol Wojtyla)
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"The unforgiveable sins this earth must confront and overcome are Nationalism, capitalism, and hoarding. The idea of every nation should be forgot, price should be struck from the commons, and princes should be seen for the devils they are. The sins include our church, secret societies, and other religions which make of... more »
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Help!! Your opinion on the direction of Industrial technology devices?
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Hi All, You might be able to help me in the following. My knowledge base is in electro-mechanical devices and hence I currently providing training to Industry in the areas of Pneumatics, Hydraulics, PLC's and associated technologies. I am thinking of branching out my training services into other related areas... more »
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Easy current measure/recording in power strips?
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I'm looking for an inline plug-in type of AC current meter that will tell me how many amps are flowing through a particular power strip - i.e. I'm willing to unplug a power strip from a receptacle, plug in a "gizmo", then plug the power strip into the gizmo. This is a 'temporary' kind of basis... just measurements... more »
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"REWIRE IT" with These SMD Prototyping Breadboards QFP TSSOP SOIC DIP
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11 SMD Prototyping Breadboards, TSSOP, QFP, SOIC, Proto-Chip n' DIP 2 and a mix of all the above. 4 NEW Triple Pitch TSSOP/SOIC boards with ground planes on back, power traces on top. 0.5, 0.635/0.65, 0.8 mm and SOIC patterns 1.75" square. 4 other new QFP and TSSOP/SOIC boards, and more. 1.5" square... more »
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Wireless MIDI Device
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I've been gearing up to take on a new hobby project, building a wireless MIDI controller. I've done a fair bit of research and I am pretty straight on what parts I need for the task and so on. The one roadblock I've hit is making the setup wireless. The options I've explored are mainly Bluetooth and RF with the latter looking to be more... more »
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