Easy peasy
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Today, 02:56Easy peasy replied to a thread Circuit to pulse from 1v to 1.1v repeatedly. in Analog Circuit Designfrom the graphs in the data sheet - the best you can do with this device is about 80mV for 1mA collector and 100uA base, there are a heap...7 replies | 237 view(s) -
Today, 00:41generally IGBT's can turn on very fast, if driven hard, i.e. Vgate rise <30nS, in your case you have emitter degeneration with the emitter...1 replies | 63 view(s)
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21st July 2019, 04:57Easy peasy replied to a thread ELECTRICAL AND ELECTRONICS Instrumentation in Elementary Electronic QuestionsDear Barry, rms of A + rms of B does not give a total rms figure, rms must be added vectorially, unless they are both DC signals, or AC...23 replies | 692 view(s)
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21st July 2019, 04:26having an intermediate stage which copies the gate drive PWM and keeps it going to the o/p when the input goes away - is a very unusual requirement...12 replies | 437 view(s)
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21st July 2019, 04:20without calculating the heatsinks required for each side and the watts you are ( hopefully ) shifting off the hot side - you are operating blind -...9 replies | 317 view(s)
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20th July 2019, 08:01please describe your heat-sinking - if any ...?9 replies | 317 view(s)
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19th July 2019, 01:55Yes - a ckt that stores enough energy for operation for 50uS ride through ...12 replies | 437 view(s)
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18th July 2019, 23:07Surprisingly the fets will work up to 125 degC without issue - but the accompanying rise in Rds-ON, with contant current operation will likely...29 replies | 1212 view(s)
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18th July 2019, 09:43baileychic replied to a thread Unable to read data from RTC DS1307 using Atmega8 and mikroc. in MicrocontrollersI don't see the code of TransformTime() function. TransformTime() is needed to convert the RTC data to readable form. libstock.com has the mikroE...10 replies | 419 view(s) -
18th July 2019, 06:00measuring efficiencies is very problematic, you need better than 0.5% instruments to get near a 1% error, even so it is likely your eff is a...29 replies | 1212 view(s)
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18th July 2019, 03:04It's very hard to advise when you don't know the level the OP is at, if you look at a 10V source you will see 10V regardless of all else, this is...14 replies | 605 view(s)
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18th July 2019, 00:17A 10V source will always read 10V regardless of the current in or out of it - you need to read up more on the sim program14 replies | 605 view(s)
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17th July 2019, 22:30I am making a HX711 based Weighing Scale using PIC16F877A. The datasheet ...0 replies | 146 view(s)
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17th July 2019, 22:11it appears your uP is issuing commands to the IGBT's at power down - this is a common oversight. You need to ensure, by hardware methods...31 replies | 1123 view(s)
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17th July 2019, 09:11Easy peasy replied to a thread Choice of capacitors for DC blocking and 3A AC? in Analog Circuit Designits nearly resonant at 18MHz, so OK at 10MHZ, just, but not any higher, possibly better to have several 33nF ... in parallel5 replies | 245 view(s)
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17th July 2019, 04:565V might not be enough to turn on the mosfet14 replies | 605 view(s)
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17th July 2019, 03:39for 1mH and say 25% ripple the required sw freq can be found from: V/L = di/dt let us assume you want 5A ave into the batt, so +/- 1.25A ...14 replies | 605 view(s)
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17th July 2019, 03:24Hello all, we follow this forum quite closely - there is a lot of good information contained. We have a group of fantastic design engineers in...0 replies | 157 view(s)
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17th July 2019, 03:03Easy peasy replied to a thread Choice of capacitors for DC blocking and 3A AC? in Analog Circuit DesignNP0 is a better choice at >10MHz ...5 replies | 245 view(s)
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16th July 2019, 09:05a good idea to leave the diode as it is - keep things simple initially, it is fairly obvious the 1mH choke is part of the buck ckt.14 replies | 605 view(s)
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16th July 2019, 08:56Easy peasy replied to a thread can triacs rapidly switch AC into a transformer in Elementary Electronic Questionsyour approach is a little bit simplistic - you will need snubbers across the mosfet switch, and source referenced gate drive, you will get...7 replies | 265 view(s)
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16th July 2019, 08:10Easy peasy replied to a thread can triacs rapidly switch AC into a transformer in Elementary Electronic Questionsforced commutation was used to turn off SCR's ( mainly ) and triacs - however a lot of extra circuitry is required - then along came mosfets &...7 replies | 265 view(s)
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16th July 2019, 05:03you can't turn an SCR off once fired - so your ckt needs a xtor or mosfet - which you can turn off the SCR will stay on forever once triggered...14 replies | 605 view(s)
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16th July 2019, 03:47Easy peasy replied to a thread ELECTRICAL AND ELECTRONICS Instrumentation in Elementary Electronic QuestionsPMMC = permanent magnet moving coil - meter, I think all moving coil meters give an average reading... moving iron have expanded...5 replies | 178 view(s)
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14th July 2019, 22:26Easy peasy replied to a thread [SOLVED] Iron sheet laminated gapped core inductor variation in Elementary Electronic Questionsa random data sheet has no bearing on a gapped choke made using transformer steel, an old measuring device with unknown capacitor degradation - and...26 replies | 1220 view(s)
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14th July 2019, 08:58Easy peasy replied to a thread [SOLVED] Iron sheet laminated gapped core inductor variation in Elementary Electronic QuestionsBarkhausen noise would not rise to the level needed to seriously interfere with measurement at 50mV, the main issue with 50mV measurement is the...26 replies | 1220 view(s)
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14th July 2019, 08:47Easy peasy replied to a thread Does it exist an AC to AC converter in small package for converting 220v to 110v? in Power Electronicsthe word AND in the above quote makes the sentence incorrect, you can have the first 65 degC or the last in an half cycle - but not both - for...24 replies | 776 view(s)
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14th July 2019, 03:06Easy peasy replied to a thread [SOLVED] Iron sheet laminated gapped core inductor variation in Elementary Electronic Questionsthere is no published paper or article that says the slope or behaviour the BH curve at low excitation is any different to the slope/ behaviour at...26 replies | 1220 view(s)
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13th July 2019, 22:45Easy peasy replied to a thread [SOLVED] Iron sheet laminated gapped core inductor variation in Elementary Electronic Questionsthere is no evidence to support this - I have never observed this - it also goes against the principles of physics relating to magnetic materials.26 replies | 1220 view(s)
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13th July 2019, 22:35Easy peasy replied to a thread Does it exist an AC to AC converter in small package for converting 220v to 110v? in Power ElectronicsConduction angle is in fact about 65 degrees i.e. the first, or last 65 degrees of each half cycle, if you want 110V rms from 230Vrms - - -...24 replies | 776 view(s)
About Easy peasy
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- founder MagnetPowerNZ Ltd & Pwrtrnx.com
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- engineer
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