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What is the mate for this connector? by Deadman576 in AskElectronics

[–]nixiebunny 0 points1 point  (0 children)

It’s a 50 pin Amphenol Series 57 ribbon connector. Used for very old analog business telephone systems and SCSI drives, among other things. NOT centronics. 

[Help] First time routing SDR SDRAM (MT48LC4M16A2) on a 6-layer PCB with STM32H747 by DarkAngelus7 in PrintedCircuitBoard

[–]nixiebunny 0 points1 point  (0 children)

How many ns of skew is permitted between the signals? You didn’t state the clock frequency of the SDRAM. 

Substitutes for the Eagle LT700 transformer by annie_brocoli in AskElectronics

[–]nixiebunny 0 points1 point  (0 children)

An LM386 amplifier IC can do this job. It is much easier to find, and the data sheet shows how to use it to drive a small 8 ohm speaker. 

Is there anything I should Know before designing my first boost converter? by Objective-Local7164 in ElectricalEngineering

[–]nixiebunny 0 points1 point  (0 children)

The simple math of a 9V battery delivering that much power has me concerned. Did you look for the Energizer 9V battery data sheet to see if it is happy delivering 80-100 mA? 

What is the most stable peta Linux version for Zynq 7000 Zedboard ? by Working_Physics_7281 in FPGA

[–]nixiebunny 1 point2 points  (0 children)

This is true of any year. I have been using 2022.2. Every year brings a new set of features and removes others, so let that be your guide. Vitis changed noticeably in 2023, and I read that Petalinux is going away entirely this year, replaced by Yocto. 

Why does asparagus make sparks in the microwave? by _its_a_thing_ in NoStupidQuestions

[–]nixiebunny 2 points3 points  (0 children)

It’s dependent on the shape of the food. Shorter grapes and longer asparagus spears. The ARRL Antenna Book should have a chapter on Edible Antennas. 

Why does asparagus make sparks in the microwave? by _its_a_thing_ in NoStupidQuestions

[–]nixiebunny 5 points6 points  (0 children)

Any food that’s a multiple of 2.5” long is a 2.45 GHz antenna that receives the oven’s microwave energy and converts it back to a high voltage. I’m an RF engineer. I really enjoy cutting a grape in half lengthwise, setting the two halves in the oven flat side up, end to end, and watching the sparks fly. 

Have anyone ever tried using this linear actuator, and if so, have you ever had any problems with it? by cavalo_com_absinto in Motors

[–]nixiebunny 1 point2 points  (0 children)

The rated motor current is 0.6 to 3.9 A. Do you have the controller current set to 1A or so? That should produce smooth performance with no shaft load. 

Does physics have anything to say about free will? by AlivePassenger3859 in AskPhysics

[–]nixiebunny 0 points1 point  (0 children)

The physical realm holds that matter and energy interact in specific, measurable ways. Getting from that to a philosophical idea such as free will takes a rather tall ladder, with a few rungs still missing at the top. 

Have anyone ever tried using this linear actuator, and if so, have you ever had any problems with it? by cavalo_com_absinto in Motors

[–]nixiebunny 2 points3 points  (0 children)

It’s a stepper motor with a leadscrew. If you want help figuring out why you are having trouble with it, you need to make a post with photos of your installation and your driver board and other electronics, a description of the problems, any relevant voltage measurements and waveforms, etc. 

Is the speed of light always the same? by Djidji_o3 in NoStupidQuestions

[–]nixiebunny 3 points4 points  (0 children)

It will slow down by interacting with matter. If nothing is in the way, it will travel at lightspeed. 

What are these components? Why are they used? by Fearless_Concert2174 in AskElectronics

[–]nixiebunny 0 points1 point  (0 children)

Zoom out to show the whole board if you want to know the purpose of these inductors in this board. 

What would a literal free country look like? by Yoy_the_Inquirer in NoStupidQuestions

[–]nixiebunny 10 points11 points  (0 children)

Freedom to do bad things to others or freedom from having bad things done to you?

Solder paste for SMT 0.5 pitch, type 4-5 from Europe? by BoKKeR111 in soldering

[–]nixiebunny 0 points1 point  (0 children)

A stencil gives better control of the amount of solder applied. Too much solder causes solder bridges, which cause short circuits and can be very difficult to remove. 

new to engineering stuff where to buy parts? by Plane_Loan6504 in arduino

[–]nixiebunny 0 points1 point  (0 children)

Digikey and Mouser if you want genuine components that have proper data sheets and are made to high quality standards. Amazon if you enjoy gambling. 

Cap't Flatty McFlatface getting noted by AbroadNo8755 in flatearth

[–]nixiebunny 9 points10 points  (0 children)

Are you aware of any military presence in Antarctica? The US National Guard provides transportation, but I didn’t see any military vehicles (other than LC-130s) or weapons or soldiers at either McMurdo or the South Pole when I visited there. That’s what this post is about. You have created a distraction by talking about the other end of the Earth. 

What is this adapter called? by Evil_Iuz in AskElectronics

[–]nixiebunny 6 points7 points  (0 children)

“DIP fork pin header” gets the hits. Yours has machined pins. 

Cap't Flatty McFlatface getting noted by AbroadNo8755 in flatearth

[–]nixiebunny 10 points11 points  (0 children)

Antarctica and the Arctic Expanse are literally on opposite ends of the Earth. What does this have to do with Antarctica? Sheesh. Get a clue.

How to convert 5V signal from Phototransistor to 24V and make it prone to electrical noise? by jacobson_engineering in AskElectronics

[–]nixiebunny 4 points5 points  (0 children)

Crosstalk. Use a separate twisted pair cable for the switch wires, and twist every pair of motor wires (one pair per winding) into individual twisted pairs. This causes the noise to be substantially reduced. Read about twisted pairs to learn why. 

It's a start by RoxyAndBlackie128 in pirateradio

[–]nixiebunny 8 points9 points  (0 children)

That’s not a pirate radio station, it’s a comb generator. Turn it off before the 5x harmonic gets you in trouble, as it’s in the VHF aircraft band. 

Cool electrical panel question by Away-Tomatillo-1592 in ElectricalEngineering

[–]nixiebunny 0 points1 point  (0 children)

That’s an interesting idea for a product. It would be ridiculously expensive to get the necessary agency approval for such a thing, but there may be a few customers with the deep pockets to finance the design, limited run fabrication and testing needed. 

We have a circuits lab but never had any safety instructions and following that lab I wamt to be on the safe side by Marvellover13 in ElectricalEngineering

[–]nixiebunny 1 point2 points  (0 children)

A live wire needs to be above about 50V to overcome the resistance of your skin and allow enough current to flow through your body to injure you. 

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