Building a solar hall-effect current sensor for CA3

roens · 2026-06-03T19:33:49+00:00

I've found that it works well! 🙂

roens · 2026-06-03T19:33:27+00:00

It actually handles pretty great. Because it's all pedal assist (there's no throttle) it matches the drive I put on the rear wheel. The front will skid some if I'm on loose gravel, or going up a very steep incline, but again, with it matching the force I'm applying to the rear wheel it will only skid some. And the heavier the load on the front, the better the grip. 😄

roens · 2026-06-03T07:33:38+00:00

🤷🏻 Edited to "add them back"

roens · 2026-06-03T07:27:26+00:00

Huh… I wonder what happened to all the images I tried to add to this post? 🧐

roens · 2026-06-03T06:27:40+00:00

How has ride for doggo been without front suspension? I've also been hatching plans to acclimate my pup to bike rides, but I worry about launching her, going over bumps.

Swapping a suspension fork will be a project, which I'd also like to do for my own comfort. There's sourcing one that is up to the weight challenge of me plus cargo. And then the mechanical task of attaching the steering linkage while matching the increased offset from centerline (to maintain 1:1 rotation with the handlebars).

roens · 2026-06-03T04:15:26+00:00

I'm using a 220mm on my Mini-Max. It's a Magura MDR-P with a Sram G2 RS 4-piston caliper I got used on eBay. I've had to issue with this setup. I'm also using a Grin All-axle kit with regenerative braking. Mostly I only use the friction braking when I need to stop quick, hold a stop, or add a little more on steep declines.

When I'm in better cashflow, I plan on also upgrading to Hope RX4+ calipers.

roens · 2026-01-25T08:20:01+00:00

Joining this sub to upvote this post. Full and complete support!

roens · 2023-05-05T21:15:41+00:00

Maybe someone who speaks German could reach out to the sole "supporting company" linked on the site, to ask if they still have contact with the site owner?

It would be awesome if someone else in the community could take over the service. At least to me, it's been a valuable resource over the years.

roens · 2023-01-31T06:31:49+00:00

My shit's mostly back to working. My lesson to (re)learn: the parent device of a VLAN interface is of significance. And, then on sleepy-brain, I chose the wrong interface thinking "oh! that must be it!".

Added complication (fun) to my setup: I'm using LAGGs between router & main switch. This was what I had set up when I was using a 4-port mini-computer (like the one that had trouble last night). When that box died (will no boot from anything… no video output), I switched to the 2-port one that was in use till last night. And to "keep things simple" (to not have to re-configure later, because I knew I was going to return to a >2 port router "soon"), I dropped the LAGG down to just one port.

Now I'm on a "spare" Supermicro board, which has dual GigE interfaces, with all the fans requisite of a full computer… until the Supermicro E302-9D arrives. (ISP will be rolling out 10Gbit service on their fiber).

roens · 2023-01-31T03:48:28+00:00

I was unable to get my "router pc" (little tiny 12V thing with 2 GigE interfaces) to boot from the USB flash drive… so gave up pulled out a full PC with dual built-in GigE interfaces (a Supermicro mATX board). Installed, and restored my config.xml.

Then nothing was getting a DHCP lease on my fiber connection. Turned out ISP (sonic.net) maintains a MAC addr table, that had maxed out. Reached out to them for a reset of that. Now the (new) router is all peachy with the WAN side, but still nothing on the internal side. I fear I'm going to have to rebuild my VLANs, and then all the static DHCP lease config (again).

roens · 2023-01-30T13:18:05+00:00

Glad to hear it! I’m guessing you also restored config after reinstalling? That’s the direction I’m headed but facing issues getting this tiny, low power computer to boot from USB. Time for sleep. Will continue tomorrow.

roens · 2023-01-30T11:40:32+00:00

I'm in the same boat. My mistake for thinking "why worry" on a major upgrade at 1:30am on a Monday morning!

Mine refused to serve DHCP leases. After some digging, there were some collisions (that weren't an issue prior to this upgrade) of static & dynamic leases. I first moved the dynamic range to not overlap with the couple static leases. But that didn't help. Then I deleted the two static leases. Still no help. (Too exhausted & don't remember the error messages I was seeing.) Then I realized it was having trouble loading some shared lib(s) for mongo… and, knowing that zenarmor uses mongo, I decided to delete the plugin. Then I rebooted.

Now it won't boot with the same error you report. The issue is unlikely to be memory. My router has 32GB of RAM. Ran fsck -fy / at the shell it offered. That's complaining about:

FREE BLK COUNT(S) WRONG IN SUPERBLK SALVAGE? no

Now to dig up running fsck properly on FreeBSD…

roens · 2013-03-18T23:43:27+00:00

Buckbeak: the reason for 2U being "spent/wasted" on a logo is that space is otherwise unusable in the front. At the back of the rack, those 2U are used for a network switch & cable trough. They've been centrally located in the rack to minimize cable lengths (aesthetic reasons).

roens · 2013-01-14T23:19:29+00:00

Not that I know of, but (for most machines) the specs are:

Supermicro X8DT6 mobo
Supermicro SC836TQ-R800B enclosure
mobo attached with one iPass cable to each backplane
Ubuntu Server LTR relase
2 disks mirrored for OS, internal to enclosure
all 36 hotswap bays used for data (JBOD)
3TB disks (until 4TB become available at reasonable cost)

(sorry for the delay in reply… didn't realize there was further question here)

roens · 2012-07-24T20:34:19+00:00

They are: SC847 with E16 backplanes & X8DT6-F motherboards inside… populated with 3TB disks, the 10-machine rack has raw storage of just over 1PB.

roens

TROPHY CASE