| 23 Jul 2021 |
 kelu | there are some chips that can act as FIFOs, so that could be a solution | 17:50:08 |
| kelu | you connect the FIFO buffer between the RPi and ADC, and you get the RPi to read the FIFO by burst when not shipping through wifi | 17:50:30 |
 brycedrechselsmith | thats a good idea, its essentially what I was trying to do with the ping pong buffer, i hadn't thought to put physical hardware in that position | 17:52:04 |
| kelu | hardware is nice 😉 | 17:52:18 |
| brycedrechselsmith | in answer to your earlier question about hardware for demod, I suggested that but was shot down... | 17:53:18 |
| kelu | to be honest I'd go for a small, cheap FPGA (like the up5k i use and like) that would go between the ADC and the buffer, then buffer to RPi. | 17:54:00 |
| kelu | trick is then when the RPi isn't sending to "size" the bandwidth required to read from the buffer | 17:55:41 |
| brycedrechselsmith | interesting, I really appreciate your help! | 17:58:42 |
| brycedrechselsmith | you've given me quite a bit to research | 17:59:11 |
| brycedrechselsmith | thanks | 17:59:29 |
| 4 Aug 2021 |
|  MrShot joined the room. | 13:06:19 |
| 19 Aug 2021 |
|  @mathegenie:server.matrix4ulm.de | 19:18:53 |
| @mathegenie:server.matrix4ulm.de removed their display name mathegenie. | 19:20:03 |
| @mathegenie:server.matrix4ulm.de left the room. | 19:25:35 |
| 21 Sep 2021 |
|  ansuga joined the room. | 20:48:04 |
| ansuga | Hello 5M5PLH9S! I am interested in the un0rick and the lit3rick. I start to understand the components inside them and their role. However, I am totally noob in this field. Please, can you recommend some papers focusing on what to do with the obtained signals? I can understand that the sent and received signals are being compared. However, I cannot understand how it is exactly done. My interest is using the boards for NDT in porous materials or metals (e.g. detecting fractures). Best regards! | 20:48:04 |
| 22 Sep 2021 |
| ansuga | Ok. | 04:50:35 |
| kelu | Hi 02EKKJJTK8! Welcome 😃
You have identified a first good page - I'd recommend going on to https://kelu124.gitbooks.io/echomods/content/RPI.html -- not exactly the same hardware, but it explains for example how to go from a single element signal to an actual, B-Mode image. | 07:11:46 |
| kelu | In general, for NDT, only the A-line (aka the single line acquisition showed in the link you copied) can be used. | 07:12:17 |
| kelu | See also https://kelu124.gitbooks.io/echomods/content/Chapter1/ndt.html for NDT | 07:12:45 |
| kelu | Some info too with a dual element NDT transducer at https://github.com/kelu124/echomods/blob/master/include/experiments/auto/20190329a.md | 07:13:56 |
| ansuga | Perfect! Thank you so much for the references! | 08:07:43 |
| 23 Sep 2021 |
 jean.rintoul | totally. I have somehow got deep into this other project which involves US now… probably updates soon. | 17:37:39 |
| 24 Sep 2021 |
| kelu | Let me know if you need anything else 😃 | 10:17:08 |
| 10 Oct 2021 |
 adamsonjesse | I added my friend David to the channel because he's going to work on the photo-acoustic stuff with me. | 21:19:37 |
| 16 Oct 2021 |
|  malek.bola joined the room. | 22:56:29 |
| malek.bola | Hi friends! I am very happy to have come across this project. I am trying to set a little ultrasound lab and would be excited to set up one of these dev kits. I noticed that the modules page has some broken links for some parts and a few of the keys parents aren't acquirable (like the motherboard).
Would anyone who ordered some parts recently mind sharing where they got everything?
Would anyone here be interested in selling part of their old setup that they are no longer using?
For context, I'm starting from scratch. So tips or hints on acquiring power supply's and transducers and everything else would be welcome. | 22:56:29 |
| 19 Oct 2021 |
| kelu | Salut 02JDM6B7EV! Welcome here :)
Apologies stocks arent restocked, but chips crisis.. anyhow. I can have a look at possible stocks by Sunday, will be back to you if there is any opening on my side. | 13:15:19 |
| malek.bola | Hi Kelu! Thanks for the response.
I was also wondering if you have any instructions on an open source transducers? Is it possible to acquire parts to build the transducer from piezoelectric materials? | 19:28:35 |
| 20 Oct 2021 |
| kelu | Thats a good question, havent investigated it myself, happy to get your viens if you do :)
I've been searching either from supplier or from hacking probes open. | 07:47:50 |
