Top new questions this week:
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In order to ease supply issues, I am considering an overlapping footprint for the TQFP-32 and VQFN-32 packages of ATmega48/88/168/328 CPUs. The two packages have the same pinout. It’s a commercial …
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I do know that it is a very bad idea, as the saying goes with Don’t think handling AC is simple. Ever. Why exactly wouldn’t a simple 100+ LED array direct connected to AC work? A double rectifier …
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There have been some questions asked recently about op-amps, and I was curious to see how to make one with just NPN and PNP transistors. I did a simulation in LTspice and it seems to work pretty well, …
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Because Bluetooth earbuds struggle in my home, due to its layout and electronic noise, I hoped to switch to WiFi technology, which has a good signal throughout the house. Either to connect earbuds and …
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This and this discuss about the 3-level DC-to-DC converter. All of these are saying that the flying capacitor voltage is 1/2 VIN. However, I couldn’t find any more explanation on this. Probably it’s …
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I came across a commercial design which switches coils using N-channel MOSFETs (two in one MOSFET in a SOIC package). It surprised me a bit that there were no flyback diodes in parallel to the coils. …
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Does anybody know what this device is or what it is used for?
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Greatest hits from previous weeks:
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I’ve met many projects in which an AVR microcontroller uses with a bootloader (such as the Arduino), but I don’t understand the concept very well. How can I make a bootloader (for any microcontroller)…
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For NAND, I am doing a truth table for it and then truth tables for all the possible combinations, but as you can see the process is very long and I am still yet to get an answer. Same goes for NOR …
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What is the reverse recovery time in a diode?
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I know mAh tells how much milliamperes a battery can deliver in an hour. But does that also tell how many hours the battery would last? Sorry but I don’t really get it. If we’re talking about a water …
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This may seem like a very simple question, but I’ve searched all over the place and haven’t found an answer. When jumping a car, we connect the + end of the charged battery to the + end of the dead …
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There are a lot of poorly drawn schematics here. A few times people have actually asked for critiques of their schematics. This question is intended as a single repository on schematic drawing rules …
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I just took apart our washing machine to replace the carbon brushes. Was wondering why the machine stopped working when the brushes were worn down? Also if the engine makes a wuring noise after you …
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Can you answer these questions?
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I know that at the time of crosstalk Capacitive as well as inductive currents generate voltage drops on the victim line over termination resistors. I have three questions. 1)Why inductive crosstalk …
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This is one of the tasks in my BJT amplifier lab. I have to find impedance seen to the right from V1 which can easily be done by taking a frequency sweep and measuring \$\small \frac{V_1}{I_{C_2}}\$ …
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I just changed control switch and box with (2 capacitators in it) to my fan in the bathroom. The fan is in bathroom above shower and has a 4 uf capacitator stuck to it. Level 1 seems slower than …
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