Easy peasy
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Today, 03:34another newbie oversight - when the fet turns on there is an enormous current pulse as it shorts out the blocking cap via the diode that shouldn't...10 replies | 309 view(s) -
Yesterday, 21:34your ckt is missing a choke - has diode instead ...?10 replies | 309 view(s)
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Yesterday, 09:59Easy peasy replied to a thread Transformer coupled Class A amplifier in Elementary Electronic QuestionsNo - it is just the fact that once the xtor has turned on, i.e. output goes low, you have stored an amount of energy in the xfmr core, now if...7 replies | 266 view(s)
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25th May 2020, 07:20Neazoi, post a link to the data sheet to make it easier for people to point out the relevant bits for Rds-on at Vgs = 5V & 200mA ...9 replies | 387 view(s)
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25th May 2020, 07:18Sigh, 1uF MLCC pin 8-6, AND ... R2 = 6R8 ... AND R3 = 10 ohms,5 replies | 296 view(s)
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25th May 2020, 07:14it is a closed mag path - just look harder ....3 replies | 207 view(s)
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24th May 2020, 06:23We have built Sepics to 350kHz, choose Sepic when you want low input ripple ( and can have a quality o/p cap ) Zeta ( or inverse Sepic ) ...10 replies | 309 view(s)
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22nd May 2020, 08:09laptop psu's do make a lot of CM noise ...17 replies | 630 view(s)
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21st May 2020, 04:06Easy peasy replied to a thread Determining Value of Capacitor Between PV Panel and DC-DC Convertor. in Power ElectronicsHello Brad, um, where do you get the 0.5 amps from ... ?6 replies | 351 view(s)
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21st May 2020, 00:30Easy peasy replied to a thread Dont need a super accurate, super high bandwidth In Amp... in Analog Circuit DesignLM324 / 358 ( same IC but pair / quad ) would be fine for this ...6 replies | 326 view(s)
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21st May 2020, 00:29Easy peasy replied to a thread Determining Value of Capacitor Between PV Panel and DC-DC Convertor. in Power ElectronicsIf in doubt, put 1000 - 2200uF at 1.5 x max input volts on the input to the converter - hopefully it runs MPPT so that it's output will...6 replies | 351 view(s)
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21st May 2020, 00:21Easy peasy replied to a thread Problem with current loss with increasing length of wire in Hobby Circuits and Small Projects Problemskeep doubling up or tripling up the wires .....7 replies | 541 view(s)
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21st May 2020, 00:11Easy peasy replied to a thread Dont need a super accurate, super high bandwidth In Amp... in Analog Circuit DesignBrian's idea will work but need needs a split supply for the op-amp - unless you offset each input from the ( accurate ) 5V supply ...6 replies | 326 view(s)
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20th May 2020, 10:47JohnDave started a thread Determining Value of Capacitor Between PV Panel and DC-DC Convertor. in Power ElectronicsHi, I Am working on a Solar based DC-DC Converter its a BUCK-Boost converter, and As I read some of the articles related to the same topic Capacitor...6 replies | 351 view(s)
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19th May 2020, 09:15Easy peasy replied to a thread Relative Robustness of power semiconductors (generally) in Power ElectronicsSCR is the one that can handle the highest current peak, but it has a di/dt limitation at turn on - so series L needed IGBT driven at 7 volts...2 replies | 265 view(s)
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19th May 2020, 05:45" trial " process can be done with paper, pencil & calculator, iterating on paper gets you a lot closer to a real transformer that won't overheat...10 replies | 464 view(s)
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19th May 2020, 03:58The methods are in fact exactly the same with some fudge factors built in for wdg fill factor for the "formula" approach, same as my method, ...10 replies | 464 view(s)
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19th May 2020, 00:25Easy peasy replied to a thread Uplight dimmer based on phase-fired controller: Noise Issue in Service Manuals, Requests, Repair Tipsyour: www.uhu.com/en/product-page/plus-endfest/3950 is worth a try - get plenty on - esp around all the wires .... on the core ... heat...17 replies | 1175 view(s)
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18th May 2020, 09:10Easy peasy replied to a thread 100uA analogue meter conversion to 1A? in Hobby Circuits and Small Projects Problemshow to measure: 1.5V cell or power supply, 10k pot wired as rheostat, put in series with the meter, wind rheostat down to min while observing...16 replies | 663 view(s)
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18th May 2020, 06:30The IF is tuned so that the difference freq is the one of interest, 455kHz for the AM band for 88-108 FM the IF can be tuned over the same...6 replies | 368 view(s)
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18th May 2020, 05:03All methods end up being iterative - as judgement is needed as to freq and Bpk, and cooling available .... At 100kHz, a Bpk of 100mT ( each...10 replies | 464 view(s)
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18th May 2020, 04:54Easy peasy replied to a thread 100uA analogue meter conversion to 1A? in Hobby Circuits and Small Projects ProblemsIf we assume your 100uA meter is 100 ohm R, then this gives 10mV to drive it to 100uA and full scale therefore to measure 1A, we need a shunt...16 replies | 663 view(s)
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17th May 2020, 03:41Easy peasy replied to a thread Uplight dimmer based on phase-fired controller: Noise Issue in Service Manuals, Requests, Repair Tips"SCR talk" is also a feature of large SCR installations due to the rise time of current in the devices potting with "araldite" or similar 2...17 replies | 1175 view(s)
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15th May 2020, 03:36both schematics displayed appear to be "ünreliable" shall we say ...10 replies | 572 view(s)
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13th May 2020, 10:36the ckt is a bit wrong as the pull up R's to the pus-pull gate drive xfmr are not symmetric and one resistor has no value....10 replies | 572 view(s)
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13th May 2020, 05:26Easy peasy replied to a thread Trying to find a greater than 240v ac source on 150w 12v dc to 240v ac car inverter in Professional Hardware and Electronics Design100 VA is 263mA on the 380V tapping if this is enough then yes, if you need more then ask for more you have a 200W inverter, so 200VA ...11 replies | 1159 view(s)
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13th May 2020, 00:27Easy peasy replied to a thread MOSFETs of only one leg overheating in ZVS full bridge converter in Power ElectronicsTry researching and reading Unitrode app notes - there is a lot of information out there on FBPS - full bridge phase shift In simple terms, ...7 replies | 640 view(s)
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12th May 2020, 02:46LM358 can indeed go to zero Vout under the right conditions - it is one of the few older types that can. If the load is 100 ohm to gnd it will...10 replies | 541 view(s)
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11th May 2020, 14:45Easy peasy replied to a thread [SOLVED] High input voltage buck converter (156Vin-36V,10A out) Non isolated in Power Electronicshow are you going to dive the gates of the N fets to 12V above Vin ... ?11 replies | 749 view(s)
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- founder MagnetPowerNZ Ltd
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- engineer
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