c_mitra
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16th October 2019, 11:15The small DC fans are more resistive than inductive. I do not see any problem with your idea. But look carefully: some of the modern cooling fans...20 replies | 478 view(s) -
5th October 2019, 17:41c_mitra replied to a thread PCB flexion and cracking of SMD capacitors in PCB Routing Schematic Layout software and SimulationI am not so sure. Bigger size also means physical strength. But how does it scale? Flexing causes bending stress; for a given amount of...7 replies | 776 view(s)
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5th October 2019, 14:08c_mitra replied to a thread PCB flexion and cracking of SMD capacitors in PCB Routing Schematic Layout software and SimulationAssume the screws are nicely fixed; then major flexing can occur only on the long axis. Components that are mounted along this length shall...7 replies | 776 view(s)
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5th October 2019, 08:43electronicsman replied to a thread Does Phase Currents are always RMS in Elementary Electronic QuestionsIn the microchip application note AN2520 they have shared the experimental results. If i have to do a similar exercise how do i capture the RMS...3 replies | 218 view(s)
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5th October 2019, 06:14electronicsman started a thread Does Phase Currents are always RMS in Elementary Electronic QuestionsWhen you are driving a PMSM motor or any kind of motor, we always refer to phase currents Ia, Ib, Ic. My question is whether the currents are RMS...3 replies | 218 view(s)
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2nd October 2019, 12:17I have few clarifications on the MCLV-2 board software and the schematics. I have attached the source code of AN2520 application noted, schematics of...0 replies | 174 view(s)
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30th September 2019, 18:47Finally i debugged and the data are matching with qAngle and qSin thank you all for the first step. Long way to go before i run the motor and need...11 replies | 601 view(s)
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30th September 2019, 18:43c_mitra replied to a thread Is a tantulum different from a microfarad tantulum cap? in Analog Circuit DesignYes. Tantalum is a metal, like Aluminium or Titanium. Tanatalum capacitor is a special kind of electrolytic (mostly solid; unlike aluminium...9 replies | 457 view(s)
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30th September 2019, 16:57You are not being honest in your experiments. If you lean back sitting on a swing so that your centre of gravity shifts outside the seat, you will...84 replies | 3503 view(s)
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30th September 2019, 16:18I do not see any problem with the scheme outlined in post #4. Basically you will see waveforms of phase 1 and 2 and 3 (provided the phases do not...11 replies | 524 view(s)
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30th September 2019, 11:49Sorry for dragging it but i will explain my understanding as per the code which includes the assembler code, hope you will correct it if any mistake....11 replies | 601 view(s)
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30th September 2019, 05:58I do not see +32768. I am doing any mistake? Please correct me. SinTable: .word 0,1608,3212,4808,6393,7962,9512,11039 .word...11 replies | 601 view(s)
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29th September 2019, 13:39I have not understood the concept in the program. I think the program is using a sine look up table size of 128. I am trying in excel file , i am...11 replies | 601 view(s)
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29th September 2019, 10:12Thank you very much for the reply. If you can tell me one conversion it will greatly help. First thing i am not very familiar with assembly language....11 replies | 601 view(s)
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29th September 2019, 09:15I am referring to the AN1292 application note source code. I have few questions in the fuction OPENLOOP_RAMPSPEED_INCREASERATE = 10 void...11 replies | 601 view(s)
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28th September 2019, 00:16The metals are reusable; copper, gold, palladium and nickel. I have been told that the amount of gold present in waste PCBs is more than that present...2 replies | 1539 view(s)
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27th September 2019, 23:49Perhaps the Hydrogen peroxide is too weak; use a stronger solution. Etching for a longer time will get you a poorer quality.16 replies | 660 view(s)
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27th September 2019, 14:46But this effect, not really mysterious, is actually due to air friction. If you have an open umbrella in your hand, it is trivial. It is the same air...84 replies | 3503 view(s)
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26th September 2019, 07:56You are right. Conservation of energy is a stronger notion in this case. Rotational speed goes up because the moment of inertia goes down. ...84 replies | 3503 view(s)
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25th September 2019, 15:09Sadly, no. Like Audioguru has pointed out the reference voltage can be off by +/-5% (although most will be pretty close). In the same way,...49 replies | 1913 view(s)
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25th September 2019, 14:47Compare and contrast a real experiment. The famous Foucault's pendulum. The plane of the pendulum can be considered to be the plane of the...84 replies | 3503 view(s)
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24th September 2019, 23:23c_mitra replied to a thread Design and construction of scintillometer for evapotranspiration in MicrocontrollersThe basic principle is simple. To use the stated method, you need to focus on one of the strong absorption band. N2 does not absorb in the IR but...30 replies | 4200 view(s)
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24th September 2019, 18:12Whereas this is correct in principle, you should focus on the final objective. The LEDs should get the same current and provide uniform intensity....49 replies | 1913 view(s)
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24th September 2019, 11:16c_mitra replied to a thread -3db frequency of the op-amp open loop gain in Analog Integrated Circuit (IC) Design, Layout and FabricationUsually it is 3db power or gain point; -3db is approximate equal to 50% of the original gain (sometimes power) and 3db is similarly equal to double...11 replies | 718 view(s)
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23rd September 2019, 13:35This page http://hosting.astro.cornell.edu/academics/courses/astro201/earth_precess.htm says that the precession period is about 26000 years. ...84 replies | 3503 view(s)
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23rd September 2019, 13:15c_mitra replied to a thread Single conductor inside hollow conductor in Elementary Electronic QuestionsThere is no way to ensure that the CT is not introducing any phase shift. So if you want to measure the phase of the current, you should not use the...39 replies | 2856 view(s)
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23rd September 2019, 11:37Things can be confusing but I am not here to add more. In Cartesian space, you have motion on a straight line, kinetic energy is (1/2)m.v^2. This...84 replies | 3503 view(s)
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23rd September 2019, 11:00c_mitra replied to a thread Single conductor inside hollow conductor in Elementary Electronic QuestionsI presume these are RMS values. I agree with what FvM says (#35) but it may not be a bad thing considering the simple design principles. But I...39 replies | 2856 view(s)
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23rd September 2019, 10:37c_mitra replied to a thread Is it possible to make an IGBT to work at duty cycles up to 100%? in Power ElectronicsI presume you got the idea by now. If you see the waveforms in the typical datasheets, they do not appear square, they are trapezoidal. And there...17 replies | 1107 view(s)
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