FvM
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Today, 16:23FvM replied to a thread Connect MQ135 Gas Sensor to Raspberry Pi 3B+ in Hobby Circuits and Small Projects ProblemsValues read for unconnected (floating) ADC inputs are meaningless. You can either connect known DC voltage for test or just ignore these values....1 replies | 0 view(s) -
Today, 12:45FvM replied to a thread Distance between MCU-Phy-Magnetics-RJ45 in PCB Routing Schematic Layout software and SimulationYou have to check impedance matching and termination for each connection. Ethernet is usually terminated at the PHY, in this case, there are no...2 replies | 74 view(s)
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Today, 11:15FvM replied to a thread How to create a voltage selector circuit in Hobby Circuits and Small Projects ProblemsThe usual solution, also implemented in LM3915 dot matrix mode is working like below: - have comparators for each threshold level - have a priority...6 replies | 163 view(s)
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Today, 09:19FvM replied to a thread Charging Voltage for a 1.2V NiMH Battery in Hobby Circuits and Small Projects ProblemsV450HR has a datasheet, it's strongly suggested that you observe the specifications when designing your charging circuit. ...6 replies | 189 view(s)
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Today, 09:03A reactive load shifts the resonance frequency, it can't change the electrical length of the resonator itself. Intuitive explanation, determine...1 replies | 125 view(s)
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Yesterday, 11:31EPM7128S is the obsolete 5V version. Mouser has only one type on stock. If you can switch to pin compatible 3.3V EPM7128A, the series is still in...5 replies | 203 view(s)
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3rd December 2019, 23:36The micro strip trace width may be correct, the trace outside the ground plane is not. You are adding considerable series inductance in the flex...8 replies | 233 view(s)
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3rd December 2019, 23:13FvM replied to a thread LM5642 buck converter not work in Hobby Circuits and Small Projects ProblemsConnection of KSx and Ilimx is wrong in your schematic. Probably only a drawing error. As your measurement shows, the chip is hold in shutdown....7 replies | 328 view(s)
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3rd December 2019, 22:40FvM replied to a thread [Moved] CAN Transceiver Chip calculating effective CANH to CANL capacitance in Analog Circuit DesignNear. Not C1||C2, it's a series circuit, Cdiff + C1*C2/(C1+C2). No, Ci and Cdiff values are representing the same physical capacitance. Cpin = Ci...1 replies | 148 view(s)
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3rd December 2019, 22:21FvM replied to a thread [SOLVED] PWM applied to load while current limiting on load simultaneously in Analog Circuit DesignI'd say, you have partly understood my points. Apparently not yet the point about energetic efficiency. - - - Updated - - - To give a...20 replies | 611 view(s)
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3rd December 2019, 17:56FvM replied to a thread [SOLVED] PWM applied to load while current limiting on load simultaneously in Analog Circuit DesignThe standard potential of a water electrolysis cell is 1.23V, applying a higher voltage doesn't increase the gas yield per ampere second but causes...20 replies | 611 view(s)
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3rd December 2019, 16:04FvM replied to a thread When ad7321 collects voltage, a spike voltage appears in Analog Integrated Circuit (IC) Design, Layout and FabricationYou don't show what's connected to VIN0 and VIN1. The ADC inputs are usually driven by a low impedance buffer, otherwise charge injection of the...2 replies | 109 view(s)
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3rd December 2019, 11:28ESP32 maximum ratings suggests that IO pins have clamping diodes, but there's no current rating. For additional safety, you may place external...13 replies | 349 view(s)
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3rd December 2019, 11:09FvM replied to a thread is it possible to ZIP a file using STM32F4 ? Any library available? in MicrocontrollersI was talking about minizip package as zlib addon. It's said to generate *.zip files, but I didn't check myself.8 replies | 335 view(s)
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3rd December 2019, 08:59Main problem is Z-diode leakage current. Diode characteristic isn't that steep as you apparently expect. Additionally may be ESP32 input current.13 replies | 349 view(s)
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3rd December 2019, 08:44FvM replied to a thread is it possible to ZIP a file using STM32F4 ? Any library available? in MicrocontrollersYou didn't review the features of the package, right?8 replies | 335 view(s)
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3rd December 2019, 00:31FvM replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignLDO pass transistor power dissipation is (Vin-Vout)*avg(Iout). Additional considerations for SOA. Irms isn't present in the calculations.36 replies | 602 view(s)
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2nd December 2019, 23:10FvM replied to a thread Iran Core Transformator No Load Current (Core material) in Power ElectronicsMay be better. For completeness, we would measure current phase angle. Current can be lower due to higher permeability or lower losses.3 replies | 190 view(s)
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2nd December 2019, 22:59FvM replied to a thread Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster in PLD, SPLD, GAL, CPLD, FPGA DesignAs far I'm aware of, there's no 64-bit code running with Quartus 13 under WinXP. But I didn't check specifically. USB Blaster driver and JTAG...9 replies | 351 view(s)
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2nd December 2019, 19:49FvM replied to a thread Relating Transmitter dBm to uV/m and EIRP in RF, Microwave, Antennas and OpticsFCC measures actual field strength in 3 m distance. If you can prove that your application environment involves a respective attenuation, it should...8 replies | 335 view(s)
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2nd December 2019, 19:41FvM replied to a thread is it possible to ZIP a file using STM32F4 ? Any library available? in MicrocontrollersO.K. zlib with minizip addition.8 replies | 335 view(s)
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2nd December 2019, 17:41FvM replied to a thread [SOLVED] Average vs RMS load-current for LDO design in Analog Circuit DesignNot for pulsed DC. But that's just theory and doesn't actually matter for the question. The voltage regulator power dissipation only depends on...36 replies | 602 view(s)
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2nd December 2019, 17:35FvM replied to a thread VU Meter only with 1LED (PWM) no IC except for OPAMP in Hobby Circuits and Small Projects ProblemsAccording to post #1, you want 4 discrete display levels (duty cycles 0, 0.25, 0.5, 0.75), no continuous variation of duty cycle. If so you need...6 replies | 211 view(s)
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2nd December 2019, 17:26FvM replied to a thread Relating Transmitter dBm to uV/m and EIRP in RF, Microwave, Antennas and OpticsIn this case, transmitter power can be increased according to the expectable body attenuation.8 replies | 335 view(s)
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2nd December 2019, 17:20FvM replied to a thread is it possible to ZIP a file using STM32F4 ? Any library available? in MicrocontrollersCheck gzip8 replies | 335 view(s)
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2nd December 2019, 14:10dpaul replied to a thread QMTECH Xilinx FPGA Artix7 Artix-7 Development Board in PLD, SPLD, GAL, CPLD, FPGA DesignMoreover your country could levy import taxes on electronic products (when the amount crosses a certain limit). So check that out. (If I buy an FPGA...5 replies | 350 view(s) -
2nd December 2019, 12:03dpaul replied to a thread QMTECH Xilinx FPGA Artix7 Artix-7 Development Board in PLD, SPLD, GAL, CPLD, FPGA DesignI told that I am 'skeptical'. It is a personal feeling. Sorry, I don't have data to speak on advantages and disadvantages.5 replies | 350 view(s)
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2nd December 2019, 09:43Use a soft starter because you suspect sensor can't handle the inrush current? Seriously? CT sensors are usually able to absorb inrush currents....10 replies | 1050 view(s)
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