BradtheRad
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Today, 01:13BradtheRad replied to a thread Design and construction of scintillometer for evapotranspiration in MicrocontrollersThe Ebay listing is a spectrometer. It's not likely you can aim it at the dirt and read moisture content. Not that I know anything but on a...18 replies | 1381 view(s) -
Yesterday, 22:21BradtheRad replied to a thread Re. PADS pcb won't open (after mains power returned) in Software Problems, Hints and Reviews* Is your file corrupted on disk? See if you can duplicate it, or move it, or rename it. An error suggests it is no longer usable. If you can...1 replies | 83 view(s)
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Yesterday, 19:02This method is not precisely the same as the thread topic but it has the same result. And it needs no op amp. Villard voltage doubler. Accepts AC...7 replies | 390 view(s)
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Yesterday, 18:28BradtheRad replied to a thread [moved] Convergenge issue PSpice- LM5022 in Software Problems, Hints and ReviewsDoes it work (or does it break) if exposed to negative polarity? What happens when the AC supply goes into negative region?12 replies | 284 view(s)
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17th May 2019, 22:48BradtheRad replied to a thread [moved] Convergenge issue PSpice- LM5022 in Software Problems, Hints and ReviewsWhat is supposed to be the power supply for the control IC? Your power supply icon appears to be AC. Instead it is normal to supply DC to a boost...12 replies | 284 view(s)
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17th May 2019, 02:23BradtheRad replied to a thread [CST-MWS] How to get data-points for 2D geometry? in RF, Microwave, Antennas and OpticsTo send only the outline: 1) Send a code which designates row 1. 2) Starting from the left, send column position of each pixel which is turned...4 replies | 152 view(s)
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16th May 2019, 23:28BradtheRad replied to a thread [moved] Convergenge issue PSpice- LM5022 in Software Problems, Hints and Reviews* C4 can be removed. Or else put a low-ohm resistor inline with it. By itself it's charged immediately by the power supply. In real life it's okay to...12 replies | 284 view(s)
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16th May 2019, 11:33BradtheRad replied to a thread Fully differential continuous time integrator in Analog Circuit DesignDoes this setup resemble yours? PWM is fed to a DCR integrator, so it is smoothed to a volt level in the range 0 to 5v. Duty cycle ranges from...2 replies | 352 view(s)
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16th May 2019, 07:12BradtheRad replied to a thread Phase and frequency locking multiple (9 units) LLC drivers that are each 10cm apart in Power ElectronicsIt sounds as though you're trying to impose one resonant frequency where your various converters have different resonant frequencies. I wonder if...15 replies | 353 view(s)
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16th May 2019, 05:25BradtheRad replied to a thread shape sensor can be used with a prosthetic hand in Robotics and Automation ForumI picture a grid of switches, packed densely so that at least one switch is pressed by a corner of a square when the hand squeezes it. * Therefore...2 replies | 371 view(s)
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16th May 2019, 04:52BradtheRad replied to a thread Negative voltage needed in K-band in RF, Microwave, Antennas and OpticsMethod to derive a negative supply from positive pulses. The oscillator is made from 2 invert-gates (powered by a default 5V supply although of...3 replies | 746 view(s)
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15th May 2019, 00:39A cold filament is exposed to extreme surge current by direct hookup to mains. On the other hand a transformer self-limits current output, because...11 replies | 347 view(s)
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14th May 2019, 23:55BradtheRad replied to a thread Design and construction of scintillometer for evapotranspiration in MicrocontrollersSee if moisture changes the soil in some measurable way, such as: * electrical conductivity (DC or AC various frequencies) * acoustic or...18 replies | 1381 view(s)
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14th May 2019, 03:55Expect the die's tiny teeth to break on tungsten carbide. You might manage to cut a thread on a lathe with diamond-tipped tool. Set the carriage...20 replies | 3397 view(s)
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13th May 2019, 08:08BradtheRad replied to a thread how to design a thermostat without Microcontroller? in Analog Circuit DesignThe feedback resistor is usually a much higher value than the input resistor. Try substituting a potentiometer for the two resistors. The values...64 replies | 2218 view(s)
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13th May 2019, 07:37It's an unusual request for unusual times. It may become a more frequent request, the way the world is getting. A detector ought to be located close...5 replies | 1150 view(s)
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13th May 2019, 00:20BradtheRad replied to a thread Li-Po Single Cell Charger - USB-C Power Delivery in Power ElectronicsIn regard to modern USB protocols I believe your knowledge is greater than mine. I understand a USB port provides 130 mA by default, until the...3 replies | 657 view(s)
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12th May 2019, 23:51BradtheRad replied to a thread UART-->RS485 (transmission is finished and it may respond) in Digital communicationIt's important for the receiving unit to stay in sync with each byte of data as it arrives. The sending unit sends a predictable sequence of bits,...24 replies | 498 view(s)
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12th May 2019, 00:55BradtheRad replied to a thread Some specialist in medical equipment (technical)???? in Service Manuals, Requests, Repair TipsAlthough Edaboard has a global audience, neverthrelss it is rare to walk in and find one of our experts has the exact field of specialization, to...5 replies | 325 view(s)
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11th May 2019, 16:11This is a modified sine-wave. Spikes are produced at shut-off, and they are more severe because of going to a high-impedance state. Consider trying...9 replies | 1987 view(s)
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11th May 2019, 15:25BradtheRad replied to a thread Li-Po Single Cell Charger - USB-C Power Delivery in Power ElectronicsIsn't the purpose of enumeration to stop a short circuit, or to prevent drawing such extreme current that it could break circuitry inside valuable...3 replies | 657 view(s)
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