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391 questions from the last 30 days
Newest Active Bountied Unanswered
31 votes
4 answers
3k views

I remember in the early 2000s, ferrite cores seemed to be all over. They were on the Playstation conttoller's cable, on USB cables, TVs would come with clip-on ferrite to put on your cables, it seemed ...
TJM's user avatar
  • 819
12 votes
10 answers
1k views

I have made several projects that used mains power, but all of them followed strict isolation standards for the high and low voltage sections of the board. I have a new project idea that requires ...
TJM's user avatar
  • 819
6 votes
8 answers
1k views

I am working on an ATTiny programmer (because it is fun and existing ones did not quite meet my desired specifications, most notably USB-C connector). My first version used a standard DIP-8 socket to ...
erikor's user avatar
  • 269
9 votes
4 answers
854 views

I am designing an LED matrix for an LED lamp. I need to calculate the heat dissipation from all LEDs which is the dissipation of one LED times their number to choose an appropriate heat sink. The ...
AbdAllah Talaat's user avatar
  • 409
5 votes
3 answers
2k views

This paragraph is from The Art of Electronics third edition: Some more home-grown philosophy: there is a tendency among beginners to want to compute resistor values and other circuit component values ...
Tom's user avatar
  • 665
10 votes
3 answers
1k views

In the Pinecil schematic, you can see the HSM4313 dual P-channel MOSFET that drives the heater connected in the following way. Note that the node labelled A goes to the heater, the other end of which ...
Mark's user avatar
  • 213
6 votes
6 answers
806 views

I had an old (20 yo+) variable voltage power supply that died, so I replaced it with this one that allows me to control current AND voltage output. An example of how I planned to use this PS is to ...
OhSeeGee's user avatar
  • 85
7 votes
3 answers
1k views

Mobile network base stations are generally protected against power loss by batteries. My understanding is that they used to use negative 48V DC power, i.e. 24 2-volt lead acid cells in series, with ...
juhist's user avatar
  • 2,503
10 votes
6 answers
1k views

I was re-reading the perennial Electronics.SE post Decoupling caps, PCB layout And in the very highly-voted answer it says: Now remember that a microcontroller is a broad band current source with ...
TJM's user avatar
  • 819
12 votes
4 answers
1k views

I repair industrial electronic boards that use a thick 3mm aluminum base. This material absorbs a lot of heat, making rework difficult. What equipment do you recommend for safely soldering and ...
Rachid BEN ABDELMALEK's user avatar
  • 129
7 votes
5 answers
1k views

I finished the schematic for my first custom PCB in KiCAD. However I'm having some questions still unanswered. Is the schematic for the USB port correct, I want to have a serial communication via USB?...
Aaron De Winne's user avatar
  • 71
12 votes
3 answers
635 views

I want to amplify a \$\pm\$2 V signal from an arbitrary waveform generator to \$\pm\$25 V. This signal will be used to drive a 5 nF load (MEMS device) The slew rate should ideally be at least 0.5 V/...
fermi's user avatar
  • 131
7 votes
3 answers
603 views

Quad Flat Package is a rectangular component package with "gull wing" leads on all 4 sides. The smallest common package is QFP-32 (8 leads on each side). The question is specifically about ...
tpimh's user avatar
  • 633
10 votes
2 answers
789 views

It's my first time working on a board with more than 2 slaves on SPI bus and I'm not sure if I'm doing it right. Also, I can't find any clear instructions how I'm supposed to do layout. The SPI clock ...
Stanislav Ryzhkov's user avatar
  • 113
7 votes
4 answers
445 views

I'm a hobbyist working on a personal project. I've got some experience building PCBs, so I thought I would try to integrate a switching power supply into my current project, mostly as an educational ...
Nathan Johnson's user avatar
  • 81

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