KlausST
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Today, 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....6 replies | 326 view(s) -
Yesterday, 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...4 replies | 102 view(s)
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Yesterday, 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 | 233 view(s)
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Yesterday, 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 | 130 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 | 97 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 | 897 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 | 298 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 | 669 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 | 187 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...3 replies | 246 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 | 348 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 | 236 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 | 505 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...6 replies | 326 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 | 359 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 | 359 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 | 669 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 | 342 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 | 669 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 | 505 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 | 897 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 | 262 view(s)
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22nd January 2020, 23:33Hi, Infineon has a lot of ICs and application notes. ...19 replies | 897 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 | 505 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 | 492 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 | 367 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 | 273 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 | 641 view(s)
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20th January 2020, 07:27Hi, I don't think that a 2200W power supply with just rectifying the input to a capacitor bank is according nowadays rules. I'd use a PF stage...19 replies | 897 view(s)
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20th January 2020, 07:20KlausST replied to a thread Ferrite bead usage in ADC's in PCB Routing Schematic Layout software and SimulationHi, Go to the AD1955 site (not EVAL). Or just type "AD1955" into the search of analog.com and you will find "UG-48 ..." That's it Klaus21 replies | 1695 view(s)
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