FvM
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Today, 15:58FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignBulk capacitors are fine to source pulse currents, but the OP is planning 100 ms pulse duration if I understand right. You'll need huge (100 mF...9 replies | 87 view(s) -
Today, 15:53levnu started a thread OCXO Freq Stability Vs. Layout design guidelines in RF, Microwave, Antennas and OpticsQuestion: What are the layout guidelines that will allow me to minimize the Y1 mil & Y2 mil sizes (see attached picture) such that the below 10MHz...0 replies | 2 view(s)
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Today, 14:32FvM replied to a thread Audio amplifier on PCB error. Ports of opAmp shorted.Can't find the reason why? in Analog Circuit DesignWhich circuit are you talking about now? Post #1 or post #4? - - - Updated - - - Doesn't make sense. How do you measure?14 replies | 399 view(s)
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Today, 14:23FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignThe circuit in post #1 is no correct constant current source. The gate voltage, at least the DC value, should be fed to the current controller.9 replies | 87 view(s)
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Today, 14:05This works for a constant or only time dependent resistor. If the resistance is also a function of another node voltage or branch current, it has to...6 replies | 64 view(s)
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Today, 10:34Not specifically, review help for "B. Arbitrary Behavioral Voltage or Current Sources"6 replies | 64 view(s)
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Today, 10:30FvM replied to a thread Any way to make a rounded rectangle non-plated hole in Altium? in PCB Routing Schematic Layout software and SimulationPolygon can include arcs. I guess, you just haven't found how to draw it. I don't specifically know with Altium, but all quality PCB tools that I...4 replies | 65 view(s)
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Today, 10:27FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignGround short is a problem to consider if you can't guarantee the quality of external wiring. Don't know how it is in your design? If the driver is...9 replies | 87 view(s)
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Today, 09:50O.K., if you can live with AD8130 common range, this is surely an option. I have used it in a number of design, particularly high MHz current sense....4 replies | 51 view(s)
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Today, 09:38FvM replied to a thread Any way to make a rounded rectangle non-plated hole in Altium? in PCB Routing Schematic Layout software and SimulationThink of the non plated hole as a board cutout. There are no limitations for it, except for available milling tools. If you want a radius below e.g....4 replies | 65 view(s)
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Today, 09:36FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignWhy particularly? I don't recognize any advantage if you are free connect the LED string as you want.9 replies | 87 view(s)
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Today, 09:29FvM replied to a thread Car battery STARTER voltage help (not charger) using variety of methods (possibly AC) in Hobby Circuits and Small Projects ProblemsThe term booster seems to refer to using the existing battery, not an external supply. At least no external supply is mentioned in your original...10 replies | 139 view(s)
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Today, 09:15You mean modelling a voltage controlled negative resistor in the simulator in contrast to designing a real circuit that exposes a negative...6 replies | 64 view(s)
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Today, 09:09Differential probe is a rather general topic. Beside bandwidth, you want to specify input impedance, common mode range and common rejection ratio...4 replies | 51 view(s)
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Today, 08:59FvM replied to a thread Every few Hours clock running fast rtc1307 in Hobby Circuits and Small Projects ProblemsWhat does running fast for 1 sec actually mean? How much is the time advancing?3 replies | 65 view(s)
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Today, 07:52FvM replied to a thread Car battery STARTER voltage help (not charger) using variety of methods (possibly AC) in Hobby Circuits and Small Projects ProblemsSeriously I don't get of which kind of boosting you are talking. Is it about bosting the voltage for the starter or the ignition system? Boosting...10 replies | 139 view(s)
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Today, 07:39FvM replied to a thread measuring slow oscillations with magnetic methods in Miscellaneous EngineeringAcceleration sensors are the usual tool to measure mechanical oscillations. For the intended low frequency range cheap MEMS accelerometers may be...3 replies | 60 view(s)
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Today, 07:36I skip the "perfect" square wave discussion. To get a square wave at all, you need a free-wheeling diode.15 replies | 190 view(s)
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Today, 06:54FvM replied to a thread Capacitor Burning issue due to unusual reasons in PC Programming and InterfacingBoth ground nets are apparently connected by a SMD jumper next to the 10µF input capacitor. The ground net isn't exposed at the solenoid...36 replies | 438 view(s)
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Today, 06:51FvM replied to a thread [SOLVED] does copper tape need grounding when sheilding plastic enclosure in Elementary Electronic QuestionsYes, without grounding mains hum and similar interferences won't be blocked.3 replies | 124 view(s)
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Today, 06:47Yes, more or less.15 replies | 190 view(s)
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Yesterday, 23:01I was referring to your provided info saying IRF540 and 20V supply.13 replies | 249 view(s)
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Yesterday, 18:15FvM replied to a thread Capacitor Burning issue due to unusual reasons in PC Programming and InterfacingTo achieve what, particularly? 2803 diodes are just fine for regular solenoid load, no reason to add anything. If you fear shorted solenoids however,...36 replies | 438 view(s)
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Yesterday, 17:06FvM replied to a thread Load pull values as frequency increases in RF, Microwave, Antennas and OpticsThe optimum load impedance curve represents the output impedance of your power stage and depends on it's topology and component parameters, also on...5 replies | 135 view(s)
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Yesterday, 16:59FvM replied to a thread Capacitor Burning issue due to unusual reasons in PC Programming and InterfacingYou didn't yet answer the question if the burned capacitor was observed in the single side post #1 or double side post #15 PCB. You say "We will plan...36 replies | 438 view(s)
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Yesterday, 16:41The gate driver is connected wrongly. It's a complementary emitter follower, should have NPN on top and PNP on the bottom. Both emitters tied to the...15 replies | 190 view(s)
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Yesterday, 16:32FvM replied to a thread How to build a oscillator by using a Sallen Key filter. in RF, Microwave, Antennas and OpticsThe distortion is present by design of the circuit. There are different ways to overcome it. - use a magnitude control circuit with linear gain...5 replies | 164 view(s)
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Yesterday, 15:48Resistor burning can be well explained by using inappropriate resistor values. One point is to assure the specified LED current for MOC3021 (15 mA...4 replies | 99 view(s)
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Yesterday, 14:37You are right, current shunt is a convenient option if a floating load is feasible. I was only thinking of a grounded loaded. One would use...3 replies | 99 view(s)
About FvM
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