c_mitra
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Today, 03:59The bug was actually associated with the floating point division processor (NDP) - divisions take considerably longer time and they use different...13 replies | 489 view(s) -
4th December 2019, 13:02For 8 bit unsigned int, you will need a table 256X256 in size. The products shall need 16 bit storage. For the slowest method (school book way) it...13 replies | 489 view(s)
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4th December 2019, 12:51c_mitra replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignA quick summary: Avg value of noise = const DC offset + avg (noise) --> zero (second term) (Avg of noise is always zero except for the offset; or...36 replies | 626 view(s)
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4th December 2019, 03:34c_mitra replied to a thread How to make a coil to be resonance? in Electromagnetic Design and SimulationIt already have a natural resonance frequency; because of internal parasitic capacitance. You can either measure it directly or estimate it...3 replies | 179 view(s)
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3rd December 2019, 07:17c_mitra replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignBut this needs more details.36 replies | 626 view(s)
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2nd December 2019, 17:46I am not so fortunate; inside temp in winter (Dec-Jan is the coldest in my part of the world) around 27-30C (outside it can be 40C in direct sun). In...9 replies | 525 view(s)
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2nd December 2019, 17:30c_mitra replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignIn that case, the rectified output of an AC is not DC; but I am not sure what is the more common understanding.36 replies | 626 view(s)
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2nd December 2019, 17:10c_mitra replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignNot correct. This is true only for a constant current. I guess I need not elaborate.36 replies | 626 view(s)
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2nd December 2019, 13:17c_mitra replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignIt is surprising; a small digital circuit as a load to a LDO regulator is not expected to act like this! Can you please provide more details?36 replies | 626 view(s)
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2nd December 2019, 12:35c_mitra replied to a thread [SOLVED] Lenovo laptop problem during installing LINUX OS in General ComputerModern linux is quite robust: did your installation went through all right? Please mention the specific distribution of Linux you are using....6 replies | 1062 view(s)
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2nd December 2019, 12:30c_mitra replied to a thread Rectifier diodes with bypass capīs & gounding speaker basketīs in Hobby Circuits and Small Projects ProblemsTrue. As long as it works. A good power supply can make several iota:s of difference. A simple capacitor snubber across the rectifier diodes can...23 replies | 1075 view(s)
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2nd December 2019, 01:09Good that you found a solution. You need to estimate the heat being produced by the device and how to transport this heat to elsewhere. You may still...9 replies | 525 view(s)
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2nd December 2019, 01:02I am not sure whether you are conducting these experiments with sufficient care and safety protection. Potassium permanganate mixed with sulphuric...15 replies | 974 view(s)
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28th November 2019, 15:42Hydrogen gas will appear at the Al electrode when there is no current. As soon as you start drawing current, hydrogen ions will move towards the Cu...15 replies | 974 view(s)
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28th November 2019, 14:54Hydrogen evolution is the basic reaction. The hypochlorite acts a depolariser and you will get HCl produced as a result. HCl is an acid and will get...15 replies | 974 view(s)
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27th November 2019, 18:52Actually, the formal expansion for atan(x) is: atan(x)= x -x*x*x/3 +x*x*x*x*x/5 -x*x*x*x*x*x*x/7 +.... This series expansion converges slowly...22 replies | 865 view(s)
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27th November 2019, 15:23Take a look at the original set of data. Sometimes a plot says a lot. So I plotted the last column against column 1. This is what I get: ...22 replies | 865 view(s)
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27th November 2019, 04:00You need to tell us the difference in the two environments before we can make out some sense of the two readings. Then also interchange the two...9 replies | 525 view(s)
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26th November 2019, 16:52You are right; the look up table has to be computed outside. Only the table has to be stored. If you are using a 8-bit interger, -1 to +1 need to...15 replies | 734 view(s)
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26th November 2019, 04:55Right. The total energy stored in the motor is being dumped on the capacitor and resistor. With a 1/2 HP motor, that can be significant. Because...25 replies | 872 view(s)
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26th November 2019, 04:35Right. A large part of the sine curve can be approximated by a straight line; see the graph below. As sin(x) is always within +/-1, 10%...15 replies | 734 view(s)
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26th November 2019, 02:18Using trigonometric identities. For 90 >x >45, we use the formula sin(90-x)=cos(x)=sqrt(1-sin^2(x)) Actually the sinus and cosinus tables...15 replies | 734 view(s)
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25th November 2019, 10:43What you are suggesting is called linear extrapolation; look up tables may use actual values and can be more accurate. In good old days, we had...15 replies | 734 view(s)
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24th November 2019, 02:50The alkali (sodium hydroxide) removes the protective oxide layer from the Al surface. It also attacks the metal with production of Hydrogen. The gas...15 replies | 974 view(s)
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23rd November 2019, 10:08I do not know how I overlooked that. Blame it on old age. Of course you are right. Something is fishy.25 replies | 872 view(s)
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22nd November 2019, 14:19I strongly suspect that the capacitor is defective (failed due to high voltage spikes from the motor). If your motor is taking about 2A current...25 replies | 872 view(s)
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21st November 2019, 12:55c_mitra replied to a thread What wire is this? Old 2009 TV in Service Manuals, Requests, Repair TipsThey are not usual cables for the speaker. They are commonly audio signal cables. If the cables are at fault, they must be broken (discontinuous)...3 replies | 320 view(s)
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21st November 2019, 12:41First you must try to get reproducible results. By design, your setup is irreproducible. Why? To get a stable potential at the Cu plate, you...15 replies | 974 view(s)
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21st November 2019, 06:39Because a galvanic cell or an electrochemical cell, both have considerable internal resistance. Commercial cells (say a Pb acid cell or a Li based...15 replies | 974 view(s)
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21st November 2019, 03:13Analog meter has a current shunt. Often the movement is a 10K/V sensitivity and the shunt is limiting current. Anyway, you need to read the fine...15 replies | 974 view(s)
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