Electrical Engineering Stack Exchange
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1500 questions
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10 answers

For mainstream computing what are the practical advantages of 64-bit register size CPUs given the needs of today and the near future?

I understand one of the limitations of 32-bit processors is the inability to easily address more than 4GiB of RAM, which is a present day need even for mainstream computing on phones, tablets and laptops. What are some other mainstream computing…
satur9nine
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How to secure cables to a PCB

What is a good way to secure cables to a PCB? There are some good advice in the following post, but the application is slightly different: Securing electrical cables to holes in enclosures? In this case, the strain-relief/securing of the cables will…
K0ICHI
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9 answers

Is Arduino ideal for making a HRNG (hardware random number generator)?

I'm putting together a design for a hardware random number generator that will utilize multiple sources of entropy (combined): Ambient light Ambient sound (and sound levels) Ambient temp Ambient humidity Position of the device itself (upside down,…
Tim Post
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Capacitors with a "/" on schematic

I'm looking at a schematic for an old turntable that I am needing help on when viewing the capacitor values. All of the polarized caps will have 2 values written next to symbol i.e. C01 22/10 (MS). I'm assuming one is the voltage and the other is…
kernisme
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How does the oscilloscope trigger really work?

I'm trying to learn more about digital oscilloscopes, especially triggering. Here is how I think the trigger works: Let's say I set the trigger to edge mode, and the level to 5V. When the signal measured then hits 5V, the scope's ADC activates and…
S. Rotos
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How does LIDAR avoid getting confused in an environment being scanned by hundreds of other LIDAR?

(Meta: I do not know an appropriate place for this on Stack Exchange. There does not appear to be any groups related to autonomous driving technology and computer 3D vision / perception systems.) For self driving vehicles using 3D depth perception…
Dale Mahalko
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7 answers

Which PCB software has the best autorouter?

I know that lots of people out there feel that autoroute results are not useable. I find that the autorouter is a good way to get a good placement. I use eagle. I do a basic placement, autoroute everything and look where my wire crossings are. Where…
mmccoo
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This LM317 diagram doesn't make any sense to me

So this is the basic wiring for an LM317 as a voltage regulator, and very little of it makes sense to me. First off, if one pin is for my adjustment, why do I need \$R_1\$? \$R_2\$ will give me just about any value I need to send. Is \$R_1\$ really…
Jared Cravens
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What's the purpose of these copper coils with resistors inside them in A Yamaha RX-V396RDS amplifier?

This is an bit of an overly specific question, but I'm curious about the purpose of these coils inside a Yamaha RX-V396RDS amplifier and wondered if anyone could explain what they're for. They appear on PCB Main 1. Also, would having the resistor…
andyface
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9 answers

Ideas to stack multiple PCBs on top of each other?

My design has a number of boards stacked on top of each other. I would like to connect signals across the boards. The boards all need the same 10 signals running through them (all boards from top to bottom), so that simplifies it a bit. What could…
OrCa
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How do I construct a SPICE model from a data-sheet?

This may not be the ideal forum for the question; please migrate if a forum is better suited for the question. I'm looking at a component for which my attempts at locating a SPICE model online were fruitless. There are, however, datasheets of the…
Everyone
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How to design an RC snubber for a solenoid relay driving an inductive load?

I read up that switches driving inductive loads need to be snubbed and an RC pair seems to be the best (cheapest?) option. I have a large-ish AC induction motor (for a refrigerant compressor) that is being switched by a solenoid relay (about once…
Sohail
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Designing a GSM PCB antenna

Before someone complains about my crappy design I should tell you that my knowledge on antennas or RF is near zero. I recently worked on a project that required a GSM module. After testing it on a PCB using an external antenna that apparently seamed…
Bruno Ferreira
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Using a diode to ensure current flows in only one direction, without causing a voltage drop

To power my microcontroller (ATmega8), I am using a ~5.4V voltage source. I want to ensure that I don't accidentally connect the voltage source in reverse, and figured a diode would be a nice way to accomplish this as from what I have learned so…
capcom
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What is a differential ADC?

How does a differential analog to digital converter differ from a regular ADC?
joeforker
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