c_mitra
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Yesterday, 14:50Follow the suggestions in #4 post. Fast turn on and turn off will reduce the losses but design and layout will be more critical. It is perhaps...4 replies | 189 view(s) -
Yesterday, 14:35c_mitra replied to a thread Rectifier diodes with bypass capīs & gounding speaker basketīs in Hobby Circuits and Small Projects ProblemsYou have given a link and I have glanced through that. The problem with "their" argument is that switching produces ringing (noise) which is true....26 replies | 1145 view(s)
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Yesterday, 09:39c_mitra replied to a thread Confusion with relating the sensor output voltages from its datasheet in Robotics and Automation Forum500 ug = 500 x1e-6x980 cm.sec^(-2) = 0.49 cm.sec^(-2) ---> bit small but can be measured. As others have pointed out earlier, the output will be...4 replies | 209 view(s)
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Yesterday, 09:24Yes, you can. But for 1.5kw output, you will have a current of 125A; add some margin and get FETs that can handle 200A or so. Driver side may...4 replies | 189 view(s)
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Yesterday, 09:16You are right here. Mosfet cannot do anything by itself; it does what it is supposed to do. Usually you tell it what to do by giving a voltage to...13 replies | 277 view(s)
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6th December 2019, 03:59The bug was actually associated with the floating point division processor (NDP) - divisions take considerably longer time and they use different...13 replies | 579 view(s)
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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 | 579 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 | 637 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 | 200 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 | 637 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 | 584 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 | 637 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 | 637 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 | 637 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 | 1109 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...26 replies | 1145 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 | 584 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 | 981 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 | 981 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 | 981 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 | 876 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 | 876 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 | 584 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 | 740 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 | 891 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 | 740 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 | 740 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 | 740 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 | 981 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 | 891 view(s)
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