FvM
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Yesterday, 23:23FvM replied to a thread Confusion with relating the sensor output voltages from its datasheet in Robotics and Automation ForumI agree that the datasheet is very clear about expectable output voltage. But if you plan to measure 500 ug acceleration, you should carefully...2 replies | 121 view(s) -
Yesterday, 23:12FvM replied to a thread Stability issue of the closed loop feedback in fully differential ampliifer in Analog Integrated Circuit (IC) Design, Layout and FabricationWhats's the purpose of feedback resistor in your simulation circuit? If it's DC bias, the feedback path should be filtered in a way that it doesn't...2 replies | 130 view(s)
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Yesterday, 23:05FvM replied to a thread Charging Voltage for a 1.2V NiMH Battery in Hobby Circuits and Small Projects ProblemsCharging VR450 continuously with 20 mA will not quickly damage it but probably reduce its lifetime by overcharging it. Continuous current without...10 replies | 315 view(s)
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5th December 2019, 18:41You should ask yourself what you consider wrong data? 1. Single bit data, toggling at arbitrary times. You'll either read the old or the new data....2 replies | 169 view(s)
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5th December 2019, 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....4 replies | 172 view(s)
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5th December 2019, 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 | 181 view(s)
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5th December 2019, 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 | 242 view(s)
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5th December 2019, 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. ...10 replies | 315 view(s)
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5th December 2019, 09:03A reactive load shifts the resonance frequency, it can't change the electrical length of the resonator itself. Intuitive explanation, determine...2 replies | 229 view(s)
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4th December 2019, 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 | 228 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 | 259 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 | 361 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 | 167 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 | 634 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 | 634 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 | 130 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 | 425 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.9 replies | 409 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 | 425 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?9 replies | 409 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 | 630 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 | 209 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 | 439 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 | 364 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.9 replies | 409 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 | 630 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 | 228 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 | 364 view(s)
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