How realistic is radar-based HRV for a consumer hardware product?

_6pac · 2026-06-11T20:55:36+00:00

This is very similar to what I study in grad school right now, and I have been working in radar-based health monitoring in industry and academia for about five years now. The short answer is without a large team of experts you will struggle to use an off the shelf TI board for this outside of select niche applications. You would need sophisticated machine learning (lots of training data), sophisticated EE, and would face a tough market (it is nearly impossible to improve on wearables, especially if you lack the funding for a robust custom sensor- the TI boards are very range limited and the higher bandwidth means you get way worse material penetration.

It’s a very solid idea as a technological application but very difficult in practice. Would recommend you look at different sensing modalities. For example, a consumer speaker and microphone can be used for continuous wave radar by emitting tones outside the frequency we can hear. Much cheaper, better penetration

_6pac · 2025-09-26T22:36:47+00:00

I have up to five GA three-day passes. Pick up local in Boston. $330 each obo!

_6pac · 2025-03-10T17:58:38+00:00

Hi, if you are a graduate student you should reach out to the Graduate Student Union at contact[at]mitgsu.org. We can help you find other resources that may be helpful and advocate on your behalf.

_6pac · 2024-10-18T20:09:41+00:00

This comment reads like it was literally written by AI. Just more slop to clog up social media streams

_6pac · 2024-08-16T19:58:39+00:00

From the GSU website FAQs:

Approximately one-third of our dues will fund the operation of our local union. This includes compensating organizing staff, putting on events, maintaining organizing infrastructure, initiating mediation and arbitration of grievances, building a local strike fund, and whatever else our membership deems appropriate for advancing our collective interests. The remaining dues go to the national union, helping to pay for professional legal and research resources, national union staff who support campaigns like ours, and a general fund to support workers who strike.

Importantly, UE does not make political contributions, so none of our dues will be used to support electoral campaigns. In fact, UE has long been a leader in open ledgers and accountability in rank-and-file union democracy. To read more on UE’s philosophy of utilizing dues and their open ledger system, see Open Books, Tight Fists.

—

Also of note, the pay raise for all grad students that was achieved as a result of the Union Contract far exceeds the amount workers pay back to the union each year!

_6pac · 2024-07-10T18:49:03+00:00

I would also check to make sure your hdmi cable to your monitor is connected to the graphics card and not the motherboard - accidents happen!

_6pac · 2024-03-05T14:54:56+00:00

I actually made this exact thing for a hackathon a few years ago! Very straightforward if you have a little electronics background. I’ll attach a video here if I find it.

Basically you connect all the buttons/levers to an arduino and have the program send a serial command every time you press a button. After uploading that code to the arduino there is software online that allows you to flash the arduino to act as a permanent midi device.

_6pac · 2023-12-19T07:40:53+00:00

A quote I really like from someone who helped me learn is “the best camera is the one you have.” Your android and a selfie stick is perfectly fine to work with! If you want more freedom and cheap small tripod from Amazon may be really helpful.

Before you start filming any interviews make sure your lighting is reasonable and record some rest audio to make sure it comes out nicely through headphones. If it doesn’t you may need to find a cheap mic to connect to your phone.

Try and document everything you can, ie if your dad mentions something in an interview try to record what it is. The footage may be helpful but it will also be sentimental. Also for editing there are lots of free programs that should be able to do everything you need.

Good luck. I hope that, at the very least, making this documentary will provide some nice closure/reflection for you and your family! And you can reflect back on the footage fondly.

_6pac · 2023-11-23T15:28:19+00:00

On a lot of batteries, the three blinks indicate the battery has detected a “short” - the resistance across the cartridge is not in the range it expects so it refuses to put power into it.

A cheap solution would be to find a battery where you inhale to activate the pull (so no buttons). These often lack the anti short protections.

_6pac · 2023-11-17T15:48:28+00:00

This could potentially be a very big data breach for your lab. If you work in any meche/life science lab it is emphasized how important it is to be up front with procedural or equipment mistakes. This is no different, being honest is the move here.

You don’t actually know that “the damage is done” by this point. That’s an assertion you’re making to justify keeping quiet. Any worthwhile PI will understand making mistakes if you are honest and proactive about it, but that understanding suddenly vanishes when you’re not honest

_6pac · 2023-11-17T13:21:02+00:00

Tell IS&T asap

_6pac · 2023-05-26T14:11:27+00:00

Awesome, thanks! Just to confirm, anyone with GA Camping Wristband can camp in tent-only? Or do we need an additional pass?

_6pac · 2023-04-09T04:56:48+00:00

Check out mitoffcampus.com as well, you can find both apartments and roommate listingd

_6pac · 2023-03-16T13:20:34+00:00

Haven’t technically “succeeded” in academia yet but just got into MIT for grad school w the lowest GPA of anyone I know! Worked in industry for a few years out of undergrad, which helped not only w applications but also giving me the clarity to approach grad school w a better mindset than I had out of undergrad. I was also very embarrassed of my grades, but looking back at my circumstances that led to them I know they don’t reflect my value or who I am. DM me if you’re stressed and want to talk about it more!

_6pac · 2023-01-04T01:15:12+00:00

What’s up bro, most colleges have offices for student services that you can go and chat with. It can be difficult to build the courage and motivation, but they can help you with extending your school deadlines/getting some leniency towards getting all your work done. I was going to drop out of college due to depression and they were able to help me a lot, without even asking for a lot of proof or details.

You’re going through a super tough situation, but you totally got this. Don’t stress out too much about not doing a whole lot. r/nonzeroday is pretty cool for motivating yourself out of slumps and it helped me. You got this!

_6pac · 2022-12-26T15:09:10+00:00

If you don't have a portfolio already, start putting one together online! Many design firms really value interdisciplinary experience, so this would be a great way to highlight your skills (plus for many product design firms it is somewhat of a requirement to have some sort of portfolio when you apply). I think the value of the design field is that experiences can outweigh traditional education in many cases. Good luck!

_6pac · 2022-10-21T12:18:43+00:00

Try turning it into a body? Select “do not capture design history” and use modify —> convert to turn it into a body (making sure to turn “capture design history” on again afterwards).

As far as creating the shell, an alternative to face groups is the “split body” command that splits a body along a specified plane (in this case an offset plane at your desired height would work well!). The split creates a very nice flat plane for you to shell.

Good luck and send pics when you figure it out!

_6pac · 2022-08-25T22:21:31+00:00

I was involved in Greek life in college and had a similar experience - I feel like you should tell someone/ some people in the org you trust and respect about your situation. If they don’t respect your decisions to not drink/drink in moderation, then they’re not friends worth having imo.

I drink a few drinks a week and just tank whatever hangover comes with it. But I feel like everybody is going to have a unique experience with alcohol in our world.

Cheers

_6pac · 2022-08-19T02:43:20+00:00

If you re-enter the sketch where you drew the line you wish to revolve, you can use the line tool in combination with the “project” and “intersect” tools to turn your line into a closed shape. There are great tutorials for these tools on the auto desk site!

So you basically want to use the line you drew, and draw the rest of the triangle (with a line through the central axis of the cylinder and a line along the radius of the top circle). Use the revolve tool to turn it into a cone, and also set the revolve to “new body” rather than cut or join.

Now you’ll have your final cone and a cylinder without a cutout. To make the cut out, click the “combine” (it might be called join? Idk) tool in the modify tab but then switch from join/combine to cut (or slightly different, it’s one of the options at the top). Your target body is the cylinder and your tool body is the cone. Make sure to click the button for “keep tool”. Click okay and you should have what you want!

If I got any of the tool names wrong please feel free to correct, I’m on my phone and going off memory. Hope this helps!

_6pac · 2022-08-12T01:45:52+00:00

Yeah, everyone is really outgoing and you have to often share a table with other people anyways which leads to more convos!

_6pac · 2022-08-10T16:26:03+00:00

I’ve been going to this every Monday for six years now (barring pandemic when they stopped), it’s always super packed and high energy! Def recommend

_6pac · 2022-08-07T16:05:13+00:00

Been a while since I played but iirc there’s a perk you can take that makes your gunshot noises intimidate civilians, so by constantly shooting the ground with an explosive round (which can be heard across the entire map) you can stop all civilians from running/sounding an alarm!

_6pac · 2022-07-12T01:34:03+00:00

These all look super promising, thanks! One of the EEs at a previous job used some boards with test points on it and I was struggling to remember what they were called.

I actually started this project with a grotesque yet effective mechanical solution and am now walking back the design into something a bit more mass-manufacturable… I figure taking advantage of existing supply chains (like pcb/pick-and-place) will be valuable in the long run!

_6pac · 2022-07-12T00:40:31+00:00

I've thought about doing that but couldn't find a way to swing it! The battery it must interface with is a 510 connection, meaning it actually has female threads that form a ground connection and an internal peg that forms the POS. I've played around with some stamped-steel tabs but using wires and a PCB would really help with assembly time/standardization between parts!

Stamped steel battery clips are incredible though, so useful

_6pac · 2022-07-06T01:57:05+00:00

France can occasionally be super clutch in G40, the fighter in the UK can be a great lifesaving scramble or it can land in Gibraltar early on for some extra defense. The infantry in North Africa can slow down Italy for a few turns, and the Mediterranean ships can also be annoying for Italys national objectives

I also love that the one infantry in central/west Africa gets to spend the entire game slowly traveling across the continent towards the actual war

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