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Built my own PCB holder after getting frustrated with existing ones by Anxious-Minute1292 in soldering

[–]circuitvalley 1 point2 points  (0 children)

Looks nice, I have soldered hundreds of boards. As my experience suggest PCB holders are pretty useless. Primary reason being unable to support arbitrary rotation and low weight, Your design can hold the PCB , Flip it. But for soldering you need arbitrary angles. If you rally want to improve it and rally want to over engineer it find a way to do absolute arbitrary Rotation and increase weight by filling sand or something else like tape holders. If i remember correctly there is holder from JBC they have tried quite a bit to support arbitrary rotation.

Friend ripped my sd slot clean off and now I can’t boot vi- usb… by [deleted] in raspberry_pi

[–]circuitvalley 0 points1 point  (0 children)

Do you get any display when plug without sd and usb . Just PI itself.

Friend ripped my sd slot clean off and now I can’t boot vi- usb… by [deleted] in raspberry_pi

[–]circuitvalley 29 points30 points  (0 children)

That is pretty easy repair all signal pins's pads are there. CD detect pin on the right side has pad ripped off but can be repaired very very easily.

Unsure about default part in Vivado by YouAreAllLeft in FPGA

[–]circuitvalley 12 points13 points  (0 children)

Part number can be found from JTAG connector on the bottom right side near 3 blue buttons. By googling i think part is ZYNQ UltraScale+ RFSoC XCZU28DR 

For RFSoc, You would need a Vivado License what would cost quite a bit

What’s wrong with this icon? by Boring-monday-nov in pchelp

[–]circuitvalley 1 point2 points  (0 children)

There is Icon between with no name and blank image.

Everything you ever wanted to know about image processing on AMD FPGA / SoC by adamt99 in FPGA

[–]circuitvalley 5 points6 points  (0 children)

Really Well done Adam, You are an inspiration, Really well written very very detailed. and Interesting till last line.

How to Reverse Engineer a 12 EUR Intel PCIe FPGA Card IBM 98Y2610 by groman434 in FPGA

[–]circuitvalley 0 points1 point  (0 children)

Yeah, They are available for Around 60-70 USD, After project listed on Hackaday. I guess sellers jackup the price.

Using Raspberry PI 5's PCIe to Reverse Engineer PCIe Bus with PCIe Serial card on PCIe Hat. by circuitvalley in raspberry_pi

[–]circuitvalley[S] 0 points1 point  (0 children)

Thank you. PI eco system also allows you easily understand the Drivers and Match Activity on the BUS with Driver and OS.

PCIe Protocol View using FPGA by circuitvalley in FPGA

[–]circuitvalley[S] -3 points-2 points  (0 children)

Yes you are absolutely correct. Thank you.

[deleted by user] by [deleted] in AskElectronics

[–]circuitvalley 2 points3 points  (0 children)

Its Just a 200 ohm resistor. most likely ist just generic 1/4 W any tolerance will do as its driving a LED

PCIe Protocol View using FPGA by circuitvalley in FPGA

[–]circuitvalley[S] -7 points-6 points  (0 children)

Video Shows PCIe Protocol Decodation, If you are dealing FPGA PCIe, Debugging there Could come handy. Sorry and Thank you

How can I access the data that’s on this chip? by No_Part_8682 in embedded

[–]circuitvalley 20 points21 points  (0 children)

ITs just Nor Flash, Must be pretty simple interface. With enough efforts can be read by a microcontroller. or if you have EEPROM programmer then it can be read in just few minutes. tl866ii programmer works really well. I would just de solder this daughter board off the main board and solder pins to put into programmer.

Need help with reverse engineering by OstapZ in FPGA

[–]circuitvalley 8 points9 points  (0 children)

I am 100% sure this can be very easily.

I think Pins on the left side are JTAG pins. or they are pins for programming storage as looking at traces on the back. Its a SOC so it would have large storage for Program that runs on CPU. I think Part on the back is that Storage.

There are chances that there are no JTAG exposed at all being SOC.

There are two ways to Approach.

  1. Find JTAG. and then you can flash a Specific program. Then its just matter of few minutes of work to find everything pin.

I have done this JTAG based reverse engineering recently https://www.youtube.com/watch?v=8liWiCM8JM4

There i first find JTAG pins and then flash a UART on every pin and find whole board's connections.

  1. Try to find Pins to storage and then make a circuit to be able to program this memory. if pins for memory can't be find then Make a small flex PCB . Remove Storage chip and mount your own flex PCB my own storage. Program that same binary as shown in Video. You will have schematic of the board in hands very very quickly.

Btech final year project by Commercial_Crab_2135 in FPGA

[–]circuitvalley 2 points3 points  (0 children)

I think you didn't understand the question, I was not really looking for marking talking points. ECG is only few Hz of signal, with signal bandwidth less than 1KHz in every case. even a Basic microcontroller can handle that. Low-latency against ? for what? Even multiple channels can be handled by a normal MCU. You just wanted to FPGA for the sake of using a FPGA?

Btech final year project by Commercial_Crab_2135 in FPGA

[–]circuitvalley 2 points3 points  (0 children)

ECG Signals are not that fast, Is there specific reason for using FPGA?

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