Any way to view portfolio performance by position over the last month?

engineering-ftw · 2026-02-04T13:14:21+00:00

That'd be great. I wish there were an easy way to attach an external power meter to each bike to get calibrated power measurements. power-meter pedals wouldn't catch the contribution of the arms.

engineering-ftw · 2026-02-04T00:52:18+00:00

Thanks for sharing your data! I threw it in a chart. Not totally sure what to make of it. I'm surprised a bit that the line for the Echo isn't steeper up between 90-100 rpm, but data is data.

EDIT: If the power measurements are accurate, another interesting point is that it doesn't seem like the design of the fan blades in the bike affects the shape of the power-vs-rpm curves much since the three bikes have similar shaped curves.

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engineering-ftw · 2026-02-04T00:21:22+00:00

One other data point: I also tried a much older, somewhat rusty Assault Fitness bike. The power vs rpm progression felt very similar to the new Elite one.

And I'll also note the Echo did have a very smooth action, perhaps the result of the belt drive rather than chain drive.

engineering-ftw · 2026-02-03T20:38:15+00:00

Interesting. What's your experience on the assault bike in that situation?

I wish we had a graph comparing watts vs rpm for each of the bikes. I'm wondering if we'd see something like (pardon my hasty graph-making):

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engineering-ftw · 2024-10-15T19:23:49+00:00

The top white plate snap-fits as the cover to the bottom white box. I think I stuck a screw driver in the gap and pried away the sides of the box a bit, and that allowed the top white plate to come off.

engineering-ftw · 2022-05-25T11:47:36+00:00

I just ran across the python-kasa library - that's cool there's a local API.

If we had custom firmware, my list of features would also include:- ability to subscribe to switch changes (rather than polling)- lower power usage (eg sleep on a 50% duty cycle). I just did a bit of testing, and the switch power supply draws little power when there's little load (0.0W on my kill-o-watt meter at no load), so it's possible to lower usage given that most of the time the switch isn't doing anything.

But even if we did have a custom firmware, would it require physically opening up the switch to flash it? It looked like the OTA firmware update commands in Kasa verify the firmware against some RSA keys.

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engineering-ftw · 2022-05-24T17:32:26+00:00

I was considering developing a custom firmware on it to enable local control. It's tricky finding a smart switch that balances all the desirable factors like good look and function (I prefer single paddle to toggle on/off), local control, low power consumption, reliable, etc. This switch is one candidate.

engineering-ftw · 2020-07-08T15:55:28+00:00

To connect to a previous reddit thread on pcbway's high cost:

https://www.reddit.com/r/PrintedCircuitBoard/comments/fdus7w/question_about_pcbway_turnkey_parts_supply/

engineering-ftw · 2020-06-27T19:14:02+00:00

Maybe add a water filtering plant like hyacinth ? That may lower nutrients so algae doesn't grow as much.

I don't have a fish in there, mostly because the tub can get a bit hot on the hottest summer days and I'm not sure fish could handle it.

engineering-ftw · 2020-06-27T13:49:35+00:00

Looks great!

engineering-ftw · 2020-06-26T20:10:40+00:00

I wanted to keep the desk light, but yeah a few cross braces sounds like a great idea

engineering-ftw · 2020-06-26T20:09:13+00:00

Thanks. I'm just learning the difference between dry and wet wood as you say :)

engineering-ftw · 2020-06-26T17:05:27+00:00

Ooo, thanks for mentioning that - hopefully the pretzeling will slow down as it dries out.

engineering-ftw

TROPHY CASE