EchoMods
Hardware
ultrasound hardware experiments
SHOW HN2017
227points
31comments
#127of 2,242 in 2017
Top 6%of 2017 by points
How HN took it
CuriousMostly questions and neutral comments
3 positive, 15 neutral or asking, 0 mixed, 1 critical, out of 19 comments about the project. Thread score +0.15.
Idea: 2 for, 0 againstDesign: 1 for, 0 againstPerformance: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Very cool and enjoyable Raspberry Pi project
From 2 comments
Very cool. There was something on HN about a year ago about why ultrasound machines are so expensive. This might provide some background on why something low cost makes sense.…
WestCoastJustin on HNReally enjoying this little bubble of Raspberry Pi content; it's close to my heart. Keep it up HN!
gadgetoid on HN
Objections
Single-element sensor lowers image quality compared with arrays
From 2 comments
The point being that on these experiments, the sensor isn't an array of piezos, rather a single-element piezo. Cuts the costs (a fab invoices around 100-200e for such a sensor),…
kelu124 on HNI wonder if two sensors placed at a distance can make a huge difference, and how/if the image quality converges as you increase sensors.
amelius on HN
Requests
Pulser boards should be made cheaper
From 2 comments
Wow that's really awesome, I'm just skimming the site at the moment, are you planning on selling the pulser boards etc. out of interest, if so roughly how much do they cost?
anfractuosity on HNHey! Theres a link for tindie in the doc. It's quote expensive, high voltage being the main reason, but I'm planning on reducing the costs and have a cheaper on-board extension…
kelu124 on HN
Questions
Can off-the-shelf crystal oscillators be used as ultrasound transducers?
From 2 comments
I have no idea how hackernews always reads my mind about this kind of things but I started thinking about this topic due to a personal interest a few days ago. And my question…
blensor on HNI'd been thinking about this technology recently as well, but hadn't gotten any further than perusing data sheets a little. My impression is that quartz crystals as found in…
wiml on HN
Could rtl-sdr and rpitx be used?
From 2 comments
could rtl-sdrs and rpitx be used at all?
ultrasdr on HNIt's been a question I'd love to be able to answer to!
kelu124 on HN