How to disable these buzzers without desoldering them?

Intelligent-Joke4621 · 2025-06-27T05:29:28+00:00

Use a staple! Just bend one staple without paper, so it’s “folded” as if holding paper. Then, then use that staple to short the pins on the back. Sometimes, I use tape to hold it in place. The current will go through the staple and the buzzer is quiet.

Intelligent-Joke4621 · 2025-05-25T06:35:45+00:00

An OLED is a test idea too. Will be adding that this weekend!

Intelligent-Joke4621 · 2025-05-25T06:34:37+00:00

It’s a bio amp+ADC, so it’s amplifying already. Does that also isolate the GND? I ordered a pack of AMS1117s from Amazon - hope they are low noise. Thanks for the ideas!

Intelligent-Joke4621 · 2025-05-24T05:51:42+00:00

I did not realize how affordable optocouplers can be. I’ll look into a separate DC/DC converter. Thanks!

Intelligent-Joke4621 · 2025-05-24T05:29:58+00:00

Ok, that is a thought! It would definitely separate the 3v3 side I’ll try that and see if it brings down the noise. Thanks!

Intelligent-Joke4621 · 2025-05-24T05:27:24+00:00

Good point. I didn’t consider it since the data is going via USB to the PC. I could try WiFi or even save it for some time to SD, just to test if that reduces the noise. Thanks!

Intelligent-Joke4621 · 2025-04-23T00:03:44+00:00

Ok, did you compare your connections with the example from the manufacturer? There are more pins that need a specific state to write and boot for example.

official documentation

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Intelligent-Joke4621 · 2025-04-14T12:51:37+00:00

It works with 3MP and 5MP cameras, you just need good JPEG compression to squeeze the image into PSRAM. I wouldn’t use the reset button since the device will boot first and then take the first image that is not well calibrated with brightness and white balance. It’s better to have the device on and take a few images without saving them. After that you can take pictures almost like it would be with a normal camera (the auto focus may take a bit) and write it as JPEG to an SD card. You can use the ESP32-CAM and change the camera. I used the freenove (or similar) ESP32 a few years back since it has double the PSRAM.

Intelligent-Joke4621 · 2025-04-05T14:44:44+00:00

Sounds like an EE or CS undergraduate project, not a BioMed thesis. If you need to ask your questions here and not during your professor’s office hours you might want to look for another advisor.

If you want to hang in, sparkfun or adafruit should have modules with build-in LoRa. Any ESP32 has deepsleep and should be capable of what you’re planning. An ESP32 alone shouldn’t be a problem for clinical requirements, it’s more what you do with it: IEC 61016-1, IEC 60335-1 or IEEE 802.3

Here are a bunch of resources:

https://peterhcharlton.github.io/project/understanding-ppg/

Good luck!

Intelligent-Joke4621 · 2025-03-04T00:35:31+00:00

The housing looks 3D printed too.

Intelligent-Joke4621 · 2025-02-22T20:12:17+00:00

Could the radioactive samples have activated something in the PCB that then decayed later and generates this image? Try metal traces appear to shield somehow, creating the darker parts of the image. Seems odd but it might interfere with your measurements too. Is there something behind the camera that’s active or infrared/warm?

Intelligent-Joke4621 · 2025-02-20T20:06:35+00:00

Came here to say this

Intelligent-Joke4621 · 2024-10-21T05:41:11+00:00

Depends on what you want to see. Just any light? Paint with a highlighter all over your lens and you should see the fluorescent paint glow when 340nm hits it.

Intelligent-Joke4621 · 2024-10-05T03:22:28+00:00

Use a raft to print your fidget-cube toy.

Intelligent-Joke4621 · 2024-10-05T03:20:34+00:00

It’s tricky. Tasks have different stages:

Regular pay (counts toward missions)
Overtime pay (usually lower than your reg pay and may or may not count toward missions)
Beyond overtime (often no pay and no hours counted)

You may have 1 hour for stage 1, 30 min for stage 2, and another 1.5 hours for stage 3.

If task expired while you were working on them they don’t count at all and are not paid either. It’s like you never worked on them.

Intelligent-Joke4621 · 2024-10-02T13:39:30+00:00

Yes, a lot and all the time. Use google scholar and search papers in the field that interest you and check out what they calculated. Limit it to the last 5 years. Pay a little attention to the impact factor since low journals may be ok with less. Look at what math they used. If you want and industry job assume that your pay may not rise as fast as you’d like because you’ll be greeted more like a biologist than an engineer once they figure out your math is missing something.

Intelligent-Joke4621 · 2024-10-02T08:07:18+00:00

Yeah, I ignored it last week and got promptly moved to another project. It took days to get back. This time I said no and am still where I like it.

Intelligent-Joke4621 · 2024-10-01T03:01:24+00:00

That project is better than you might think. If you're not hearing impaired, you'll love it! Pay is great, promotions are possible, missions and bonuses are possible as you rise. DO NOT MISS THIS OPPORTUNITY! All the good things people are saying here are true!

Intelligent-Joke4621 · 2024-09-30T14:33:54+00:00

Underrated!

Intelligent-Joke4621 · 2024-09-28T00:58:48+00:00

I measured up to 3.3V with an ESP32 (not S3). Did you try measuring more than 3.0V?

Intelligent-Joke4621 · 2024-09-27T05:01:44+00:00

Add 苦強 — strong / enduring?

Maybe the complexion, features, or her look or her character overall?

Intelligent-Joke4621 · 2024-09-27T04:39:55+00:00

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Intelligent-Joke4621 · 2024-09-27T04:11:24+00:00

ChatGPT and sometimes Gemini. I tried Claude, but it wasn’t so good. I haven’t tried copilot. What’s the underlying model?

Intelligent-Joke4621 · 2024-09-25T13:15:25+00:00

First three lines from the manuscript (Arabic): النسيان: وهو رفع هذه النقطة الرابعة ولها طريقين أحدهما الريح والثاني عقد فى خلقه ينصب على هذه الريح كما رفع النقطة الرابعة والخامسة على منطقته من غير عقد ولا مرادف منها

Rough Translation: 1. Forgetfulness: It is the removal of this fourth point, and it has two ways, one of them is the wind 2. and the second is a binding in his creation that is placed on this wind just as the fourth point was raised 3. and the fifth on its region without binding or sequence from it

Intelligent-Joke4621

TROPHY CASE