BradtheRad
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Today, 04:01Simulation showing how a diode-capacitor-resistor network extends a pulse. One works on an upward-going pulse. The other works on a...7 replies | 178 view(s) -
13th April 2019, 22:55BradtheRad replied to a thread [SOLVED] Creating a very sharp pulse generator in Analog Circuit DesignSimulation showing how a series capacitor produces a spike-like waveform from a slightly rounded square wave. The series cap performs the...13 replies | 864 view(s)
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13th April 2019, 11:48BradtheRad replied to a thread [SOLVED] Creating a very sharp pulse generator in Analog Circuit DesignA quick slew rate requires that a device change immediately from high ohm to low ohm (or vice versa), so that current flow changes immediately. ...13 replies | 864 view(s)
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12th April 2019, 10:30Yes, that's okay. It sounds as though you purchased 6 gauge wire, 4mm diam.32 replies | 4505 view(s)
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12th April 2019, 03:05BradtheRad replied to a thread Where i can find literature about integrated voltage supervisors (brownout detector) in Analog Circuit DesignTry a forum search for 'voltage stabilizer'. A few threads here have asked about making one. Frequently the purpose is to correct drooping mains...2 replies | 171 view(s)
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11th April 2019, 09:07BradtheRad replied to a thread PEMF and RIFE dual circuit schema questions in Service Manuals, Requests, Repair Tips* LED's have a reverse breakdown voltage which might be merely a few volts. The diodes in my simulation are safety diodes, recommended to be...17 replies | 3536 view(s)
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11th April 2019, 06:29BradtheRad replied to a thread VFD to control 3 phase AC induction motor 400V 6000 rpm in Power ElectronicsYes, the inductor introduces power factor error. Hence the capacitor needs to be added to provide power factor correction. (It has the additional...95 replies | 11054 view(s)
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11th April 2019, 00:26To use basic formulas: 1) Start with ohmic resistance (R) in your signal path. Or estimate it as voltage divided by Amperes. 2) Calculate C to...3 replies | 335 view(s)
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10th April 2019, 07:05BradtheRad replied to a thread PEMF and RIFE dual circuit schema questions in Service Manuals, Requests, Repair TipsIt's wise to have two led's, one to indicate positive polarity and one for negative. (The schematic has one led across a coil, but the author no...17 replies | 3536 view(s)
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10th April 2019, 04:46BradtheRad replied to a thread VFD to control 3 phase AC induction motor 400V 6000 rpm in Power ElectronicsTo change output voltage at the load, change amplitude of the fundamental going to the op amp. Notice the SPWM waveform remains the same amplitude....95 replies | 11054 view(s)
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10th April 2019, 02:32BradtheRad replied to a thread How can i chose the resistor value to simulate a PV cell in ADS in Power ElectronicsI measured my photovoltaic cells under the sun, loaded by various resistors. I took V & A readings for each ohm value. I made a computer program to...9 replies | 2580 view(s)
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9th April 2019, 07:06BradtheRad replied to a thread prolong the incoming pulse duration with some electronics solution in MicrocontrollersIt sounds as though you wish to store an upward-going pulse, correct? It can be done with a one-shot, or an SR flip-flop, or a DCR network. DCR...5 replies | 429 view(s)
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9th April 2019, 01:36BradtheRad replied to a thread PEMF and RIFE dual circuit schema questions in Service Manuals, Requests, Repair TipsLED's usually need a safety resistor in series to limit current. 20mA is a conventional spec but I would stay below 10mA because quality is...17 replies | 3536 view(s)
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9th April 2019, 00:38I tried the calculator and clicked 5 percent as acceptable loss. It recommends 18 gauge. Below are links to charts of wire gauges showing safe...32 replies | 4505 view(s)
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7th April 2019, 23:35BradtheRad replied to a thread efficient led driver circuit? in Hobby Circuits and Small Projects ProblemsThe above schematic is from post #7. It's similar to a boost converter. It is able to output sufficient voltage to drive all six led's in series. A...16 replies | 537 view(s)
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6th April 2019, 07:56Perhaps the question can be paraphrased: "What happened to the electronics market, since we were accustomed to long-lasting quality parts made by...4 replies | 1069 view(s)
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6th April 2019, 06:18BradtheRad replied to a thread PEMF and RIFE dual circuit schema questions in Service Manuals, Requests, Repair Tips* It's not common to put a fuse next to an led. It's sensible to put a fuse where it's easy to change and not have to unsolder it from components. ...17 replies | 3536 view(s)
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5th April 2019, 04:50The charging source must deliver higher voltage than battery voltage, so it can push current into the battery. Your circuit is also exposed to that...32 replies | 4505 view(s)
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5th April 2019, 04:02BradtheRad replied to a thread 3 phase 400Vac 5000W Full bridge converter power factor correction Buck or Boost type in Power ElectronicsReturning to your plot with the 'funny bumps'. The scope trace has misaligned voltage and current waveforms. It would mean poor power factor. However...39 replies | 3061 view(s)
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4th April 2019, 07:54BradtheRad replied to a thread Is EM at very low frequency like 20Hz propagates slower? in Electromagnetic Design and SimulationRadio-Electronics magazine did an article about their analytical tests done to compare 'beastie' cables with plain wire. They found...7 replies | 298 view(s)
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4th April 2019, 06:10BradtheRad replied to a thread [moved] verilog code of a neural network in PLD, SPLD, GAL, CPLD, FPGA DesignThis could be similar to an electronic circuit simulator. Many branches, interacting with one another. In reality the branches run simultaneously....6 replies | 766 view(s)
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4th April 2019, 05:19The error amplifier has a certain amount of gain. To make it work properly you need to give it enough gain so it returns output to the desired level,...9 replies | 1023 view(s)
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3rd April 2019, 09:50BradtheRad replied to a thread [SOLVED] Quartus and fixed point in PLD, SPLD, GAL, CPLD, FPGA DesignI'm sure you're on the right track. From seeing your initial post it sounded as though you really were calculating with geometry, finding where the...13 replies | 1508 view(s)
About BradtheRad
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- Born 1953. Some college.
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