Ductapemaster

6 ms·

1.
by Ductapemaster 21d ago
Water is being used to get heat from one place to another. The idea is being able to separate the heat generation and the heat extraction
2.
by Ductapemaster 22d ago
If you were to remove the heat at a sufficient rate by, say, turning the lid into a heat exchanger, you would have a stable system.
3.
by Ductapemaster 22d ago
Nope, it doesn't have to be open loop! Example of such a system being used specifically for datacenters: https://blog.vantage-dc.com/2026/04/22/cooling-without-the-d... Evaporated water is condensed, and
4.
by Ductapemaster 22d ago
Evaporative cooling does not necessitate an open loop system
5.
by Ductapemaster 23d ago
https://archive.ph/qX4vF
6.
by Ductapemaster 26d ago
I usually smell it too. I've noticed its when they switch from the air handler provided by the jetway (big yellow hose) to the plane's onboard system. Perhaps there's some sequencing procedure that the staff is moving through
7.
by Ductapemaster 27d ago
You're right, I was representing a best-case scenario with an intention to be inspiring. And yes, the Android approach works too and I have done exactly that with Claude previously. The BLE dongle is however a platform-independent appr
8.
by Ductapemaster 28d ago
Quite possible transport is encrypted, but that can likely be overcome with some RE on the Android app. Given the price of this piece of hardware, it's likely recoverable with moderate effort. At least worth a try.
9.
by Ductapemaster 28d ago
From my experience Fable will reject this request - its pretty trigger-happy with it's safety detector for reverse engineering, even if you push it on right-to-repair. However Opus 4.8 is more than capable of doing it, with a bit of gu
10.
by Ductapemaster 28d ago
While I empathize with your feelings about lock-in, I encourage you to see that we live in an amazingly empowering era. I would wager that with $20 in credits for the LLM flavor of the week and and an equally expensive BLE-to-USB dongle (tr
11.
by Ductapemaster 1mo ago
Nice work! Through efforts with Claude in the last few weeks, I have a working model of the actual wireless protocol between sensor and bridge, and have built a passive listener device to snoop on local traffic. I'm in the process of c
12.
by Ductapemaster 2mo ago
The 8266 has no flash readout protection, and the UART is exposed on a programming header. It was very easy to dump the firmware.
13.
by Ductapemaster 2mo ago
I looked into it and the channel sounding approach isn't yet ready. Will need the new iOS as well as some firmware work from Nordic's side.
14.
by Ductapemaster 2mo ago
No need — I simply plugged into the exposed programming header on the gateway. The sensor has an Atmel SAMD part which I assume has the security bit set. I didn't need to dump that firmware directly as it exists within the gateway flas
15.
by Ductapemaster 2mo ago
I am planning a write up once I get it working. I'd be happy to share. My setup is a logic analyzer tap on the SPI bus between 8266 and the RFM69 on the bridge device to log raw traffic, and my secondary RX (ESP32 + RFM69) for over-the
16.
by Ductapemaster 2mo ago
Interesting timing, I have spent the last week with Claude reverse engineering the on-air protocol and I'm getting pretty close to building a secondary "listener" receiver that will collect measurements from my bridge + senso
17.
by Ductapemaster 2mo ago
Nordic has newly-released silicon that supports Aliro using Channel Sounding, meaning a UWB chipset becomes optional. Also, NFC is supported directly. https://www.nordicsemi.com/Products/Technologies/Aliro/Pro
18.
by Ductapemaster 2mo ago
This is cool! I have recently been building a "life admin" system that is focused around keeping track of bills and insurance reimbursements, and I am currently extending it to support a recipe database. My data model is markdown
19.
by Ductapemaster 5mo ago
In simple terms, this works by doing an XOR on the outputs and if they disagree, performing a fault recovery. There's also space systems that use 3 processors and a majority vote for the correct output, but that's different.
20.
by Ductapemaster 1y ago
It's not about the whole microcontroller having less than 64kB of memory - it's that each WASM module has a minimum memory size of 64kB, regardless of how much it actually requires. Also, if you need 65kB of memory, you now have t
21.
by Ductapemaster 1y ago
I use this app on all my Macbooks — it's great!
22.
by Ductapemaster 1y ago
I've always wanted a Shaper Origin, but the cost and subscription fee required for accessing some features always turned me off. I don't need it for anything other than fun hobby projects and couldn't justify it. Now I get do
23.
by Ductapemaster 1y ago
Sadly, Useful Sensors seems to have pivoted to other edge AI tech and no longer sells this or their person detector.
24.
by Ductapemaster 1y ago
I spent a LOT of time on this website as a 90's kid. One of many that inspired me to get an EE degree. Projects like this always felt like some incredible magic, and came with an artistic aesthetic that I find inescapably captivating.
25.
by Ductapemaster 2y ago
Thank you (and the GP) for the correction! I'll admit this lesson came to me a decade ago and I am speaking to a rule of thumb I developed as a result. Time to update my knowledge banks.
26.
by Ductapemaster 2y ago
On your note about capacitor sizes — at my first EE job, my boss taught me about capacitance-voltage derating[0] for ceramic capacitors and it was quite the revelation. There is a significant inverse relationship between the two, which no o
27.
by Ductapemaster 2y ago
I live in Alameda and this place is such a local gem. The owners are really genuine people too. Great place to spend some time! They also own a whole warehouse out at Alameda Point filled with machines. I know they have provided some form o
28.
by Ductapemaster 2y ago
As a former Fit owner, I wish I had thought of this! The AC was really bad. We did a lot of road trips and it really struggled out on the long desert highway stretches.
29.
by Ductapemaster 2y ago
Just op-amps and FETs for the active components. The design from my memory was: - To get position, 2 integrators were applied to an adjustable voltage representing gravity. - The FETs were used to set initial states of the integrators. - A
30.
by Ductapemaster 2y ago
In my upper-division analog electronics class (the hard one), our lab project throughout the quarter was to build an analog computer that simulated the physics of a bouncing ball. Physical variables of the system were adjustable (gravity co

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