BradtheRad
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Yesterday, 11:01BradtheRad replied to a thread Freq computation without DIV instruction for 8bit MCU in MicrocontrollersConsider creating a lookup table. Say you want two digits of precision... Then you need an array of 100 elements. Exponents are a simple matter of...6 replies | 157 view(s) -
23rd January 2020, 07:53Yes, although its specs should be chosen to suit your system. Ampere saturation rating needs to be much higher than 9A. This simulation is a simple...15 replies | 595 view(s)
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22nd January 2020, 08:00The capacitor Farad value can not be too high of course, lest it pass too much current and destroy itself. Probably 1/10 Watt is reasonable....9 replies | 296 view(s)
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22nd January 2020, 07:39Another possibility is a choke filter. This is useful for smoothing current spikes which are typical with capacitor filters. A choke might go on the...15 replies | 595 view(s)
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22nd January 2020, 05:17thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsSir, Now cleared the doubts learned charactrestics lot of . And I Concluded that the desgin as follows . VDD =12Volt ...21 replies | 1433 view(s) -
21st January 2020, 06:19To illustrate here's a simple simulation of 2000uF charging through resistor and diode from 240 VAC source (peaks=340V). Timeframe 1 second. ...15 replies | 595 view(s)
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20th January 2020, 09:25BradtheRad replied to a thread Voltage input to BLDC inverters on tethered drone? in Elementary Electronic QuestionsThis calculates to average 1A current draw, 400 ohms impedance (in round numbers). That amount has to be achieved by reactive impedance (coils with...12 replies | 603 view(s)
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20th January 2020, 08:32Suppose you pre-charge the capacitors directly from an auxiliary power supply? Install a plain diode and resistor, calculated so caps take a second...15 replies | 595 view(s)
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20th January 2020, 03:32BradtheRad replied to a thread Testing Amps on rewound microwave transformer in Elementary Electronic QuestionsYes, if your load doesn't change resistance in use. Incandescent lamps increase in resistance when they glow. Normally this throws off your...17 replies | 936 view(s)
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20th January 2020, 02:54Common base mode is suitable. It's tricky to adjust bias voltage and current, in order to find a good operating point. Simple simulation using...9 replies | 566 view(s)
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19th January 2020, 08:25BradtheRad replied to a thread Voltage input to BLDC inverters on tethered drone? in Elementary Electronic QuestionsI wouldn't be surprised if the drone has its own step-down converter. High current is needed in R/C aircraft. 25 years ago electric planes typically...12 replies | 603 view(s)
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18th January 2020, 08:43thannara123 replied to a thread ADC Value gets changed when a Digital output enables in Power Electronicselectrical noise may lead ADC value2 replies | 291 view(s)
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18th January 2020, 06:05BradtheRad replied to a thread Voltage input to BLDC inverters on tethered drone? in Elementary Electronic QuestionsTether wires appear lightweight and thin, implying low Amperes. I imagine it takes from 100 to 300 watts to lift a drone cam. And it seems convenient...12 replies | 603 view(s)
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18th January 2020, 04:01BradtheRad replied to a thread Testing Amps on rewound microwave transformer in Elementary Electronic QuestionsSimulation of transformer with various loads. Switches were closed in sequence. Scope trace travels to the left. Notice volt reading drops as current...17 replies | 936 view(s)
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17th January 2020, 17:17thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsHai sir i don't have confusion as you said . I know ohmic or linear or triode region is the low resistance mode of the MOSFET operation. Where the...21 replies | 1433 view(s)
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17th January 2020, 12:01thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsThanks , But then Is the MOSFET works on cutoff and Ohmic region ? or cutoff and stauration region?21 replies | 1433 view(s)
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17th January 2020, 08:20One diode pointing downward provides 0.6V regulated voltage. Two diodes yield 1.2V. (Similar principle to a zener diode.) A safety resistor is...20 replies | 796 view(s)
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17th January 2020, 07:44BradtheRad replied to a thread Testing Amps on rewound microwave transformer in Elementary Electronic QuestionsOne way is to attach various resistors and measure AC volts. That gives you an idea when the secondary output voltage starts to drop, thus letting...17 replies | 936 view(s)
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17th January 2020, 04:38thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsHow can i attain in ohmic / Triode region ? As per the data sheet The Vds should be in the range of 2.5volt for the ohmic region. and Vgs is 5volt...21 replies | 1433 view(s)
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16th January 2020, 15:49thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power Electronicsconfused a little :-? Mesuare the Vds when it ON it gives 12mv and 10.5mv for V1 =12v and V1 = 10 respectively .21 replies | 1433 view(s)
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15th January 2020, 17:40thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsAnd Comonly what type of protections are required for a MOSFET.21 replies | 1433 view(s)
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15th January 2020, 15:29I am intrested :thumbsup:11 replies | 858 view(s)
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15th January 2020, 14:53thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsIf Vgs is 11volt and Vds is 10 volt it saying that Ohmic region . As per the ohmic and saturation region the plots shows no diffrents why so . ...21 replies | 1433 view(s)
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14th January 2020, 13:16Why should there be a limit on the velocity?1 replies | 316 view(s)
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14th January 2020, 13:10With the PFD in there, you cannot do it. Period. What I used to do was create a linear model for the components. PFD ==> VCVS with a gain of...6 replies | 499 view(s)
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14th January 2020, 10:17BradtheRad replied to a thread Earth leakage Detection "positive" as well as "Negative" >30mA. in Professional Hardware and Electronics DesignOrdinary multimeters like I've used detect current as DC only. Here's a handy trick to measure AC current: Insert a resistor inline, and measure AC...5 replies | 621 view(s)
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14th January 2020, 09:14BradtheRad replied to a thread [SOLVED] Need very basic R-C "delay off" circuit in Hobby Circuits and Small Projects ProblemsSimple diode-resistor-capacitor networks create a gradual ramp-wave when you input a sudden transition. The principle behind the downward ramp...7 replies | 493 view(s)
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12th January 2020, 05:50A voltage doubler can provide your step-up ratio, almost 2x. Two voltage doublers acting symmetrically provide AC to the load. Simulation using...5 replies | 546 view(s)
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11th January 2020, 13:41thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsThen is correct My aproximation?21 replies | 1433 view(s)
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11th January 2020, 12:59thannara123 replied to a thread Require a Desgin of A MOSFET based Switch , for study purpose . in Power ElectronicsConsider this only for learning purpose . I am Choosing N Channel MOSFET 90NF03L https://www.st.com/resource/en/datasheet/stp90nf03l.pdf As...21 replies | 1433 view(s)
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