KlausST
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Today, 09:13KlausST replied to a thread Calculating capacitor ripple current in output filter of DCDC module? in Power ElectronicsHi, Although I think that tan d will be higher at 20kHz ... the ESR may be lower... Usually if the capacitor is not specified for 20kHz or...10 replies | 265 view(s) -
Today, 07:22KlausST replied to a thread Calculating capacitor ripple current in output filter of DCDC module? in Power ElectronicsHi, "tan d of 0.08" is only half of the information you need. You additionally need the tan d test frequency to be able to calculate ESR. You...10 replies | 265 view(s)
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Yesterday, 20:10Hi, Yes, there are people that can build their own spectrum analyzer. But I doubt it makes sense for a single piece. It needs a lot of HF...13 replies | 479 view(s)
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Yesterday, 18:56KlausST replied to a thread Calculating capacitor ripple current in output filter of DCDC module? in Power ElectronicsHi, I agree. Klaus10 replies | 265 view(s)
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Yesterday, 03:30Hi, It's not only formulas, there are design rules, you need to make decisions... There are a lot of online courses, design notes, tutorials...14 replies | 468 view(s)
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22nd February 2020, 11:34Hi, One last comment. This is not true. --> In every post I told the key problem is that you don't keep on specifications and design rules....35 replies | 684 view(s)
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22nd February 2020, 10:40Hi, Ask yourself: * It works (by accident), just because you observed it's final function for some hours... * or it works reliably, because...35 replies | 684 view(s)
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22nd February 2020, 10:21Hi, If this is true, how can some of my applictions's display work? And read carefully: If you use multiplexing techniques (or other...6 replies | 279 view(s)
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22nd February 2020, 10:07KlausST replied to a thread [SOLVED] Online multisim simulation DC analysis in Analog Circuit DesignHi, V_CE of 4.6V makes no sense. Either it is * V_C (measured with respect to GND) instead of V_CE (with respect to emitter voltage) * or...1 replies | 169 view(s)
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22nd February 2020, 09:56Hi, Nobody wold build a house on weak surface with unsuitable material to test it's quality. Then build the real house with completely different...35 replies | 684 view(s)
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22nd February 2020, 09:31Hi, I don't understsnd your code ... I'm not that experienced with C But generally the ISR code should be as short as possible. You do a lot...6 replies | 279 view(s)
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22nd February 2020, 04:06Hi, How can you "make" this smps without having a schematic? Did you even read the IC's datasheet and application notes? PCB without GND...35 replies | 684 view(s)
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22nd February 2020, 03:35KlausST replied to a thread Rise times and fall times of fast transistors seem way too long in Elementary Electronic QuestionsHi, 400MHz is for small signal (non saturated) analog mode....where the gain = 1 60ns is for large signal, saturated, switching mode. Two...3 replies | 288 view(s)
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22nd February 2020, 03:29KlausST replied to a thread Question of the circuit to transmit external signal to a smartphone app in IoT - Internet of ThingsHi, You give more riddles than informations. Define: * proximity sensor * Arduino * modifying the firmware * control signal * what you...6 replies | 651 view(s)
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22nd February 2020, 02:16Hi, In most cases fc = 1 / ( 2 × Pi × R x C) applies. R3, R4 act as a voltage divider, thus for C2 2.55k applies. Choose fc to be very low,...6 replies | 231 view(s)
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21st February 2020, 21:59Hi, Especially for PID controllers, how to design them, how to tune them...there are countless design notes, application notes, discussions, even...3 replies | 227 view(s)
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21st February 2020, 07:29KlausST replied to a thread Please help power supply dead 110V to 24vdc 5vdc in Service Manuals, Requests, Repair TipsHi, Seems to be something basic. Maybe FS1 is a fuse and is blown ... Unpower your circuit and check continuity of FS1. Klaus7 replies | 382 view(s)
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21st February 2020, 02:30Hi, No. It has nothing to do with antenna material. At least it should not... Klaus16 replies | 492 view(s)
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21st February 2020, 01:48Hi, 50 Ohms is the characteristic impedance, you can not measure with an Ohmmeter. The load impedance does not belong to the antenna. It is for...16 replies | 492 view(s)
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21st February 2020, 01:13Hi, I assume there are so much parameters. (PCB material, thickness, copper thickness, layer stacking, layer count, air flow...) ..it's hard to...1 replies | 94 view(s)
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20th February 2020, 07:43KlausST replied to a thread Question of the circuit to transmit external signal to a smartphone app in IoT - Internet of ThingsHi, The linked site tells you everything you need to know. What additional information do you need? Klaus6 replies | 651 view(s)
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20th February 2020, 07:38Hi, Every Opamp manufacturer provides such documents. Start with the datasheet of the selected Opamp. Go to the manufacturer of the Opamp.. to...68 replies | 1777 view(s)
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19th February 2020, 23:42Hi, It depends on a lot of things. Power supply, power requirements, noise expectations, the chosen Opamp.... Often the datasheet and...68 replies | 1777 view(s)
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19th February 2020, 17:24Hi, Yes, with tye suitable combination of Opamp and buffer. But I call it stupid ... to add a buffer instead of using meaningful resistor...68 replies | 1777 view(s)
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18th February 2020, 22:26Hi, In a forum ... you should show what you have done... and how you tested it, what you expected and what you see instead Klaus2 replies | 216 view(s)
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18th February 2020, 03:49KlausST replied to a thread Different current measurmen numbers on a FLUKE 289 in Elementary Electronic QuestionsHi, Last page of the datasheet tells the burden resistances in current measurement mode. It is 102 Ohms vs 1.8 Ohms ... does not explain your...4 replies | 324 view(s)
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18th February 2020, 03:35Hi, This is your mistake. On a dual supply Opamp none of the supply rails is GND.... (with standard node naming) Klaus68 replies | 1777 view(s)
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18th February 2020, 03:27Hi, I'm no HF specialist, but afaik Fspacing depends on the input (data) frequency. Klaus12 replies | 393 view(s)
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18th February 2020, 03:24KlausST replied to a thread Different current measurmen numbers on a FLUKE 289 in Elementary Electronic QuestionsHi, What's the resistor value? Show a photo how you connected it. AC or DC? If AC: is the Voltmeter trueRMS or not? What waveform? 970 ohms...4 replies | 324 view(s)
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18th February 2020, 03:16KlausST replied to a thread [SOLVED] Ultra low-power timer to make a power saving circuit in Analog Circuit DesignHi, As far as I know .. every microcontroller acts this way. Idle state does not mean power off .... Klaus23 replies | 758 view(s)
About KlausST
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