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Converting a regular DSO to a battery powered device to make differential high voltage measurements. I need to make a differential high voltage measurement for a power inverter. ( up to 4 channels) The classic way is to use a high voltage active differential probe capable of... |
Thursday, 28 January 2021 - 15:29 |
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DSO oscilloscope saving single shot trigger event to memory for power supply startup I need a feauture for a DSO, but dont know which DSO brands are capable of doing it. My Fluke 199C seems not to have this feuture. I want to save the first 100ms of the power... |
Wednesday, 20 March 2019 - 11:18 |
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Recommendation for Power factor correction control Buck or Boost? I have a 3 phase 400Vac supply rectified to 540VDC. A full bridge phase shift converter converts the 540VDC @10A to 10Vdc @500A. I try to figure out a power factor... |
Thursday, 7 March 2019 - 14:11 |
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Should I cool an inrush limiter NTC or not? Advantages/Disadvantages For inrush current limitation of a 500uF capacitor @540VDC (2 series connected 1000uF 400V rated caps.) I use 5 Ohm NTC with a stedy state current of 30A. The capacity of... |
Thursday, 14 February 2019 - 16:47 |
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Transformator Flux balancing capacitor selection For a full bridge phase shift converter I need to place a series capacitor to the bridge transformer . This will prevent dc current in the trnsformer core and avoid core... |
Sunday, 10 February 2019 - 07:52 |
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lm331 cheap alternative as smd I can not find an smd version of lm331 voltage to frequency converter in farnell rs or avnetexpress. Anyone can recommend a cheap equivalent in smd package?. I need 0 to 10V input... |
Sunday, 21 September 2014 - 18:03 |
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roller bearing guided small aggragtes on elliptical path I design several small aggragtes moving along an elliptical path in an endless turning sequence. My probrem is , I am searching some robust ways to send data to these aggragtes.... |
Sunday, 27 April 2014 - 20:46 |
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SMD ferrite beads to supress noise when driving mosfets I found a very interesting element a ferrite bead in smd form. It has 0.015ohm resistance until 1MHZ and after 1MHZ the resistance rise light parabolically to a value of 50Ohm at... |
Saturday, 15 February 2014 - 19:29 |
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Paralelling 2 BJTs NPN-PNP totem pole I try to lower the junction temp of a totem pole containing npn/pnp bjts. (see picture) The unit zxgd3004E6 can give peak 8A and when working at a frequency of 500khz driving a... |
Saturday, 15 February 2014 - 14:45 |
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SOT23-6 package, Any experience for DIY reflow soldering I noticed that the new package that the manufactorer insists is sot23-6 (6 pins) rather than sot 23 (3pins) 2 back 1 front. As sot23 has 2 back and 1 front the effective distance... |
Sunday, 9 February 2014 - 10:43 |
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MLCC versus Mica capacitor for high power RF transmitter For an LC series network of an high power (20KW) RF transmitter designed to resonate at 600Khz to 1.2MHZ, I compared some capacitor types. The capacitor should be able to hold... |
Wednesday, 5 February 2014 - 12:16 |
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74HC86 has schmitt triger inputs or not? I can find nand and inveter logic with schmitt triger inputs. But when it comes to xor gate, it seems unclear. I looked at the datasheet from nxp year 2007. it says it has a... |
Saturday, 1 February 2014 - 20:39 |