BradtheRad
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Today, 06:46BradtheRad replied to a thread Simplest way of converting 240Vrms mains into 450VDC? in Power ElectronicsBy chance we can obtain your desired 450VDC by starting with 230VAC mains, then run it through a voltage half-doubler (that is, add 50 percent). ...12 replies | 422 view(s) -
Today, 00:35It sounds as though you want to combine the signals into one signal, but in such a fashion that allows you to separate them later? Or do you wish to...3 replies | 123 view(s)
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Yesterday, 20:32David_ replied to a thread Simplest way of converting 240Vrms mains into 450VDC? in Power ElectronicsThis is for a single-phase motor(fan). I have been thinking about voltage doubler directly at the mains but I don't know math good enough to be...12 replies | 422 view(s)
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Yesterday, 09:09You may have a valid point that a 3.3v converter is more straightforward to the majority of devices. Only one device needs 5v. But now someone ought...7 replies | 97 view(s)
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Yesterday, 04:59BradtheRad replied to a thread [SOLVED] Value of resistance and impedance in Elementary Electronic QuestionsHe runs a series of tests, watching the Ampere reading through his body as he conducts a range of voltages of both AC & DC. With DC he finds he needs...4 replies | 152 view(s)
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17th February 2019, 14:29AbleMan replied to a thread [SOLVED] Reverse polarity protection using N-channel MOSFET in Elementary Electronic QuestionsMy idea here is that: Reverse Polarity can be done using Diode. By rectifying the input with a full bridge rectification, before using N- Channel...5 replies | 270 view(s)
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17th February 2019, 14:170 replies | 70 view(s)
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17th February 2019, 08:34BradtheRad replied to a thread Op-amp design to use in 8 bit R-2R ladder DAC in Analog Circuit DesignI have a hunch the exercise is to build an R-2R network, then add an op amp to serve as a buffer. This is the conventional arrangement which you'll...6 replies | 176 view(s)
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16th February 2019, 21:50This implies a sudden transition, and immediate flow of current through devices. 5 GHz requires very rapid On-Off switching. Slew rate can be...6 replies | 360 view(s)
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16th February 2019, 21:09BradtheRad replied to a thread My new cadence simulations YouTube Channel in Business, Promotions, AdvertisingIt's permitted to post a link to a video (or blog article, or catalog item) when it's relevant to discussions in the technical forums. We prefer...1 replies | 187 view(s)
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16th February 2019, 19:36Yes, I see how your gyrator circuit places a capacitor so that it attenuates high frequencies. It diverts them to ground. It's a similar result as...2 replies | 158 view(s)
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15th February 2019, 06:34Since you want two waveforms staggered 180 degrees apart... It's handy to put in a D flop to divide-by-2. Then install logic gates which rotate the...3 replies | 169 view(s)
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15th February 2019, 05:58An upward or downward transition serves as a 'kick' to the filter, which might result in some kind of output. Example, an LC filter might tend to...4 replies | 212 view(s)
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15th February 2019, 03:45BradtheRad replied to a thread Simplest way of converting 240Vrms mains into 450VDC? in Power ElectronicsYes, perhaps it is sufficient to start with a 330VDC supply. A fan is the kind of load that tolerates variations in voltage. Furthermore an inductive...12 replies | 422 view(s)
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14th February 2019, 04:23It took a bit of searching to find his downloadable zip file since there are additional options to package the simulator. Click the link below,...8 replies | 351 view(s)
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13th February 2019, 09:40Falstad's animated interactive simulator is easy to draw schematics, add or remove components, change values, create scope traces. Free to download...8 replies | 351 view(s)
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13th February 2019, 09:08BradtheRad replied to a thread Simplest way of converting 240Vrms mains into 450VDC? in Power ElectronicsPerhaps a voltage doubler based on capacitors? With a Villard type it is easy to select a value for the charge-pump capacitor, in order to obtain a...12 replies | 422 view(s)
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12th February 2019, 19:40Hello. I am building a SPWM Variable Frequency Drive that should be able to output at least 240Vrms @ 50Hz to drive a fan that may consume at most...12 replies | 422 view(s)
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12th February 2019, 14:41My reply was merely speculation based on my experience with computers and communications and AT commands. I don't have specific experience with...3 replies | 192 view(s)
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12th February 2019, 13:37It's a lot to expect, for a student to understand immediately how power factor behaves, how the formulas are derived and how to apply them. A...8 replies | 351 view(s)
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12th February 2019, 03:09BradtheRad replied to a thread Power transformer monitoring device in Professional Hardware and Electronics DesignI once tried to get an IR sensor to respond to a hot stove element. I thought it should work because infrared is similar to heat. I had the notion of...21 replies | 680 view(s)
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12th February 2019, 01:05A generator requires effort to crank so it provides current to a load. The greater the power output, the harder it is to turn the generator. I think...1 replies | 120 view(s)
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11th February 2019, 07:31A signed variable with length one byte can be a value from -128 to +127. Does your program store your message length in a variable? Supposing it is...3 replies | 192 view(s)
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11th February 2019, 06:55BradtheRad replied to a thread LLC converter magnetising current reversal during dead time in Power ElectronicsLooking at your scope image, it looks as though you have a proper sinewave shaped by the series LC (or LLC). However when current flow does not...1 replies | 128 view(s)
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11th February 2019, 04:33BradtheRad replied to a thread Need to power 1.5W 5V load with a battery /recharge off solar. in Analog Circuit DesignIn terms of raw calculations you need 36 Watt-hours of power. This is sufficient to provide 36 W-Hrs of power. On average you expect to draw...4 replies | 215 view(s)
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11th February 2019, 02:01BradtheRad replied to a thread High voltage input linear regualtor using IGBTs? in Power ElectronicsIt sounds as though you need only 1.4 mA most of the time? Then it may be possible to store some juice for your infrequent 6mA load in a large...4 replies | 224 view(s)
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10th February 2019, 20:13BradtheRad replied to a thread Is there a safe way to fix this scratch on the hot side of PSU? in Power ElectronicsAliexpress lists it but 'no longer available'. (US $44.80) It isn't flux and it isn't thermally conductive paste. Its formulation must be a trade...9 replies | 553 view(s)
About BradtheRad
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- Born 1953. Some college.
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