KlausST
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Yesterday, 08:10KlausST replied to a thread Accurate mains zero cross detector circuit without optocoupler in Analog Circuit DesignHi, I did a lot of precise phase control units in the past. The most phase error was caused by the ZCU. The problem is that the waveform around...11 replies | 268 view(s) -
Yesterday, 07:53KlausST replied to a thread Fractional N Synthesizer - Dual or Multi-Modulus Divider in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, I can't follow this vague description. Please post a picture of your topology and give an example with values. Maybe you are looking for...5 replies | 176 view(s)
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Yesterday, 01:39Hi, Values of capacitors for the XTAL need to be smaller by a factor of about 1.000.000. Each bjt base needs a current limiting resistor....8 replies | 434 view(s)
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27th January 2020, 21:56KlausST replied to a thread Accurate mains zero cross detector circuit without optocoupler in Analog Circuit DesignHi, From my experience I can say that I now try to avoid optocouplers. A lot of years ago I used optocouplers (high quality brand types) for...11 replies | 268 view(s)
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27th January 2020, 08:10KlausST replied to a thread Ramping a reference voltage up from, or down to zero volts, over ~200us in Analog Circuit DesignHi, 15 equal resistors in a string connected to GND and Vref. Connect a 16:1 analog mux to each tap, including GND and Vref. Control the 4 MUX...6 replies | 274 view(s)
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27th January 2020, 07:58Hi, I won't do simple + - × ÷ math for you.... Energy = power x time. I assume you are able to calculate the energy stored in the battery by...4 replies | 171 view(s)
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26th January 2020, 19:41Hi, Some time ago I've read through some good application notes about this. I don't have the links by hand, but they should not be hard to find...1 replies | 124 view(s)
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26th January 2020, 19:36Hi, I'd use a PFC stage not only becasue of power factor correction or mains quality. I'd use it because it solves the problem with charging...19 replies | 944 view(s)
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26th January 2020, 13:35KlausST replied to a thread Circuitry to make Paralleled Buck converters share current. in Power ElectronicsHi, One idea is to use one master and all others as slave. The master does the voltage regulation (loop) ....and measure it's own current. It...11 replies | 343 view(s)
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26th January 2020, 08:53Hi, If you need further help, please provide useful informations focussed on the problem. RS485 is a very reliable data interface. Used million...15 replies | 713 view(s)
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26th January 2020, 08:35Hi, I do know neither this VFD nor the software, thus at first I'd read the manuals. Klaus2 replies | 205 view(s)
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25th January 2020, 09:42KlausST replied to a thread How to choose optimal wire width of spiral coil to attain high q factor? in Electromagnetic Design and SimulationHi, High Q means low loss. What are the losses in a coil? * core loss --> choose a core that is suitable for frequency and flux * ohmic...4 replies | 333 view(s)
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25th January 2020, 09:03Hi, Like with all electronic devices: It's written in the datasheet. In the section: Recommended Operating Conditions Klaus5 replies | 397 view(s)
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25th January 2020, 08:59KlausST replied to a thread Divide-by-1 clock divider through D flip-flops in Elementary Electronic QuestionsHi, Divide by one means "no operation at all" Output = input Useless function For such a useless function you may use a * buffer * AND...2 replies | 243 view(s)
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25th January 2020, 08:48Hi, There are XTAL frequencies for UART operation, like 3.6864MHz or 7.3728MHz You can't generate them by PLL "multiply with 2 or 4" from a...11 replies | 526 view(s)
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25th January 2020, 02:29Hi, Millions of schematics for a simple transistor - relay - control are available in the internet. Every detail of design is explained may...8 replies | 434 view(s)
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24th January 2020, 20:28KlausST replied to a thread Freq computation without DIV instruction for 8bit MCU in MicrocontrollersHi, LUT does not neccessarily be in SRAM. But an integer division should be fast. But without ranges...accuracy, resolution... Klaus7 replies | 379 view(s)
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24th January 2020, 08:11KlausST replied to a thread Freq computation without DIV instruction for 8bit MCU in MicrocontrollersHi, 40us?? Why that much time? Floating point? --> try integer solutions (what input values range, what expected calculation resolution and...7 replies | 379 view(s)
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24th January 2020, 08:05Hi, UART is just a name for the interface, but it does tell nothing about * signals (optical, voltage, frequency modulation, single ended,...15 replies | 713 view(s)
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24th January 2020, 07:32KlausST replied to a thread GND For Connector Shielding in Professional Hardware and Electronics DesignHi, ESD? No. This is electrostatic discharge. EMC. Electromagnetic compatibility. A metal case should be considered as a faraday cage. Where...5 replies | 364 view(s)
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23rd January 2020, 22:02Hi, Yes, I aslo vote for UART. The PWM needs to be continuos ... maybe causing annoying crosstalk to audio...and for sure more difficult to...15 replies | 713 view(s)
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23rd January 2020, 21:29Hi, If you use (non UART standard) XTALs, then it's almost independent of microcontroller (as long as they don't include a PLL). Because the...11 replies | 526 view(s)
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23rd January 2020, 08:25Hi, 9A RMS .... is the optimum value and only true for non phase shifted pure sinusoidal signals. For a rectifier - capacitor solution the...19 replies | 944 view(s)
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23rd January 2020, 07:49KlausST replied to a thread [SOLVED] MAX232 alternative with more lines in single package in Digital communicationHi, I'd use the selection guides or tables provided by IC manufacturers or distributors... Klaus3 replies | 283 view(s)
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22nd January 2020, 23:33Hi, Infineon has a lot of ICs and application notes. ...19 replies | 944 view(s)
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21st January 2020, 21:49Hi, I assume every PIC and AVR microcontroller can go higher than 115200 baud. Just review the datasheets. For sure it depends on the...11 replies | 526 view(s)
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21st January 2020, 21:44Hi, Low pass filter, first order, 38Hz Voltage follower to reduce impedance I assume R36, R26 are just there to ensure zero output voltage in...8 replies | 510 view(s)
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20th January 2020, 08:00Hi, Without the resistor the node is called "floating". (No predictable current flow through either diode) The voltage of floating nodes is...6 replies | 375 view(s)
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20th January 2020, 07:44KlausST replied to a thread XC9572XL-10VQG64I part number of CPLD, does it need to program or can use directly. in Service Manuals, Requests, Repair TipsHi, It's clearly a "user programmable device" --> for sure you need to program it. Only the manufacturer of the (defective) device knows the...1 replies | 278 view(s)
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20th January 2020, 07:34Hi, Yes, and there is an almost identical parallel thread ...with modified values. @OP: Show what you have done so far. Your hand made...9 replies | 651 view(s)
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