Author Topic: 10 meg sample home made scope project.  (Read 1931 times)

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Offline nigelwright7557

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Re: 10 meg sample home made scope project.
« Reply #25 on: August 06, 2019, 09:55:27 am »
I did a bit more work on the scope and with some software changes I managed to get 18.5MHZ sampling.
I just used more inline code and cached the scope buffer.

I have moved on to a cheaper design now that uses same A2D but just a cheap through hole PIC.
This one runs at 15MHz sampling. It works very well.
I put the A2D on an SMD to through hole adaptor pcb.
It was fun to solder on the small pcb as everything kept moving around when I tried to solder it.
So I put some flux paste beneath the A2D and that helped hold it in place while I soldered it.
PCBCAD51/PCBCAD360/PCBCAD720 PCB design software https://www.murtonpikesystems.co.uk
 

Online BravoV

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Re: 10 meg sample home made scope project.
« Reply #26 on: August 06, 2019, 10:12:40 am »
Pro's usually suggest 90 degree bends is not good.

very old farts maybe  :-DD
so this is the famous project i see mentioning over the microchip forums :)?

Nope, even a relic, still a 90 degree bend is a hype.

Look how this high power TV RF transmission line used it too, in Dave's tour at EEVBLog Video #569, see that multiple 90 degree bends ?  >:D

Please don't tell us those RF engineers knew nothing about doing the right thing.

« Last Edit: August 06, 2019, 10:19:34 am by BravoV »
 

Online Mechatrommer

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Re: 10 meg sample home made scope project.
« Reply #27 on: August 06, 2019, 12:32:07 pm »
bluetooth pcb/rf (antenna) designer, i guess the OP is one of them, may say differently. pun intended :P
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 

Offline nigelwright7557

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Re: 10 meg sample home made scope project.
« Reply #28 on: August 09, 2019, 05:15:25 am »
I managed to overclock the PIC32MX a bit and got up to 16.5 mega samples/second.
Built up a couple more pcb's and they all behave well.

PCBCAD51/PCBCAD360/PCBCAD720 PCB design software https://www.murtonpikesystems.co.uk
 


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