Top new questions this week:
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Even though there is a power supply unit in a computer case, why are there separated power circuits for CPU, GPU, and RAM on the motherboard? I mean, why can not the CPU, RAM and GPU just take their …
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I’m working on the parts list for a number of designs for low-voltage (24 VDC) industrial circuits that have no special safety requirements: so long as they don’t catch fire no one could be hurt nor …
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Circuit explanation: I’m trying to make a circuit which turns button pushes into binary data. The button push slowly discharges a capacitor which then triggers a 555 monostable stable circuit to …
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I would like to calibrate a VNA with the reference plane at the end of a male BNC feedline. Surprisingly, female SOL kits are hard to find. There are many BNC 50-ohm loads available but I’m having …
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This aquarium pump has a non-magnetic metallic disk between the poles of an electromagnet. When 240V AC is connected, the alternating magnetic field induces eddy currents in the disc. But how does …
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I’m studying circuit analysis. We are currently learning about AC circuits, particularly how power is calculated. I learned that there’s four types of power: Complex, apparent, active and reactive. …
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I have these contactors for my DC application. I never cared about which terminal to connect to HV, because I treated them like any mechanical switch (or 12V automotive relay). But recently I noticed …
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Greatest hits from previous weeks:
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I’m am having issues with my USBasp programmer (Windows 10). I installed the WinUSB driver using zadig 2.4. When I run AVR dude with the following parameters …
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I built a mod-16 counter, and the output result is a INTEGER (all the examples I saw used INTEGER). I built a hex-to-7-segment-display decoder, and its input is a STD_LOGIC_VECTOR (wrote it that way …
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I am new to using Arduino, and I have an Arduino Uno. For the projects I’ve done, I’ve only used the digital pins. I am building a small vehicle that uses stepper motors. I have run out of pins to …
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A teacher explained why by using a highway analogy. The more lanes you have, the faster the cars go through, where the number of lanes obviously represent the wire thickness and the cars represent …
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I want to calculate the cutoff frequency for a specific filter, but I can’t find any formula for that. I know the formula for the cutoff frequency of a low pass filter: $$f_c=\frac{1}{2\pi RC}$$ …
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In most electrical circuits with a relay, a diode is connected in parallel to the coil of the relay. Why? Is it always a good practice?
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I have recently purchased an IKEA LED bulb with G9 fittings, to replace a halogen one. This one. The bulb is installed in a lamp with 3 other halogen G9s in a 3 + 1 configuration with a 3-state …
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Can you answer these questions?
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I’m working on an device that will switch a load and measure the energy of said load. This is for a 120/240VAC system. I plan on using the MCP39F511A for this job. However in their datasheet and …
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Suppose you are implementing a BCD multiplier. Google says there are reasonably efficient known circuits for this. Say 8×8 -> 16 digits, and trying for a reasonable compromise between speed and …
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My team and I are are in need of designing our own BLDC motor controller and need some help with the circuit design. We want to stick with an FOC setup and avoid a sensor solution as those can be far …
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