BradtheRad
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Yesterday, 09:33I once installed Linux on my Compaq laptop (to a re-formatted hd). Things worked to the point where I saw the desktop open and appeared normal....3 replies | 100 view(s) -
Yesterday, 06:38A capacitor by itself creates current lead (90 degrees). By adding a second series capacitor, and tapping between them, these effects result: *...2 replies | 134 view(s)
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18th July 2019, 08:51For a tutorial, here is a simulation containing the chief components of a buck converter. It is animated and user-interactive (you press the...14 replies | 528 view(s)
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16th July 2019, 01:16BradtheRad replied to a thread Soldering on Battery Terminals in Service Manuals, Requests, Repair TipsIs the question about small AA or C or D cells? These are available with solder tabs (a few dollars each). I confess I solder wires directly to...9 replies | 326 view(s)
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15th July 2019, 23:53Perhaps after a few seconds the setting is applied even if you don't press OK? There are store-bought 'universal' remote controls, for use with a...2 replies | 176 view(s)
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14th July 2019, 07:43BradtheRad replied to a thread Tuning of varicap diode in a magnetic loop antenna based on modulating signal in RF, Microwave, Antennas and OpticsYour concept sounds similar to Automatic Frequency Control (or Automatic Fine Tuning), found in many FM receivers going back about fifty years. It...7 replies | 363 view(s)
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13th July 2019, 04:27BradtheRad replied to a thread Does it exist an AC to AC converter in small package for converting 220v to 110v? in Power ElectronicsI've seen advice telling to derate (reduce) power to an inductive load rated for 60 Hz, when you run it at 50 Hz. The reason is because an inductor...24 replies | 687 view(s)
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12th July 2019, 06:35BradtheRad replied to a thread Best books for Current mirrors and differential amplifiers using MOSFFET in Analog Integrated Circuit (IC) Design, Layout and FabricationA differential amplifier is commonly made from a long-tail pair. I needed to experiment with simulations, for hours at a time, to learn its behavior....4 replies | 283 view(s)
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11th July 2019, 14:43A plain red led should light when you apply 1.8v. (There are other colors but they require higher voltage.) It should conduct several mA. Do not...28 replies | 1287 view(s)
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11th July 2019, 04:32The Elementary section becomes an easy choice for many members, rather than to take effort to look over the sections and decide which is the proper...2 replies | 370 view(s)
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10th July 2019, 21:34Your test results appear to prove the concept. The latest plan was to supply 9V power to the IC, but bring 'tree power' into the boost stage,...28 replies | 1287 view(s)
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9th July 2019, 07:15BradtheRad replied to a thread measuring slow oscillations with magnetic methods in Miscellaneous EngineeringFor a coil, the article recommends a telephone pickup coil, or a 9V relay. Small is sufficient. The magnet has to jiggle easily, so it should be...14 replies | 1555 view(s)
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9th July 2019, 03:28BradtheRad replied to a thread measuring slow oscillations with magnetic methods in Miscellaneous EngineeringA Forrest Mims book has an earth-movement sensor project exactly like you describe ('Science Projects' Mini-Notebook, pg 40-41). Suspend the magnet...14 replies | 1555 view(s)
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9th July 2019, 00:18BradtheRad replied to a thread Matching network for low frequency upto 500 Hz in Analog Circuit DesignA simple passive filter (example, resistor & capacitor) needs a certain minimum level of current to drive it. If it loads the incoming signal then it...1 replies | 163 view(s)
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6th July 2019, 02:46David_ started a thread Unsure about this current sensor for use in saturation current measuring circuit. in Analog Circuit DesignHello. I acquired a sensor called S25P050D15X with the intention to use it in a circuit to measure the saturation current of ferromagnetic cores...4 replies | 352 view(s)
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6th July 2019, 00:14By trying various tests you may find an arrangement which creates greater voltage differential, and/or greater current. Examples: * One probe in...28 replies | 1287 view(s)
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4th July 2019, 09:08BradtheRad replied to a thread LTspice model for COB LED in PCB Routing Schematic Layout software and SimulationThe graph shows the LC019D conducting 1A at 37V. Starting out with a simulation, I changed the led to that spec, but it makes the curve too steep...1 replies | 224 view(s)
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4th July 2019, 06:49It's too much for you to expect 100mA from your setup. It's not that different from the store-bought LCD clock powered by a battery made from copper...28 replies | 1287 view(s)
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4th July 2019, 04:32Evidently a lookup table (reference) is stored. The algorithm compares the echo times, together with the lookup table. The result is distance of an...1 replies | 464 view(s)
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2nd July 2019, 09:56You are correct. Temperature change causes readings to drift. I saw this in my own tests as I squeezed the transistor between my fingers. The reading...20 replies | 565 view(s)
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2nd July 2019, 08:56Yes, that sounds like an odd arrangement on the circuit board if the connector has to change the order of the wires. To make progress in fixing...7 replies | 370 view(s)
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2nd July 2019, 02:59You can detect and amplify sense voltage via common-base operation of a transistor. My simulation has 2 milliOhm sense resistance. Even that low...20 replies | 565 view(s)
About BradtheRad
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- Born 1953. Some college.
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