poopsmith

Anyone have any recs for a quiet and ideally cheap muffler?

My bike came with a Leo Vince X3 and it's a little too loud for me. Is the stock one the quietest?

Assuming my municipality accepts it, are they actually being recycled?

I see them being touted as recyclable. However, it seems like it would be difficult and resource-intensive to recycle but I'm not a recycling expert.

The sidebar is full of links and the user has zero posts.

Communities

https://lemmy.world/c/sdfsgsdgsdhg https://lemmy.world/c/dfhdkjfdgfdhg https://lemmy.world/c/amnbjsdgsg

Users

https://lemmy.world/u/carolinamobe https://lemmy.world/u/nilssyacaloni https://lemmy.world/u/susuganan

Does anyone have any advice on routing some high speed signals on flex PCBs? I'm looking at jlcpcb because of the low cost but I'm having difficulty getting impedances to be decent.

My requirements are:

• 45 ohm single ended impedance (maybe? Def doable)
• 90 ohm differential impedance (usb spec)
• 5A current on power pins

But if we look at the capabilities: https://jlcpcb.com/capabilities/flex-pcb-capabilities

• 2 layer
• substrate thickness (PI) = 25 um
• 1 oz pour thickness = 35 um
• min trace width/spacing = 4/4 mil = 0.101/0.101 mm
• ε = 3.3

Is this feasible with this stackup? I'd like to do a 1 oz pour because of power traces, but there's also 0.5 oz (18um) and 0.33 oz (12um).

For the differential signals, when I'm doing impedance calculations, I can get to roughly 70 ohms using W=100um, S=200um. I don't think this is good enough. I think I can get away using a 0.33 oz pour but then I'm worried about the power pins.

And for the power traces, I'm needing 2.2mm, which is reasonable for the pins on a USB-C connector. But if I try using the 0.5 oz or 0.33 oz pour, it gets to be 4.2 mm and 6.3 mm, which seems impossible given the pins are tiny and very closely spaced together. Even with vias to the bottom layer, this seems problematic.

Anyone have any advice here? This is just for a hobby project, so I'm really not looking to change fabs because of costs.

I submitted a video request for any body worn video and in-car footage for the incident where SPD officer Anthony Belgarde pulled over a bus in West Seattle. But I was told by Edward Ocampo that no video existed for this incident. Is this a normal practice, to not record any video during a traffic stop?

Edit: I filed a complaint as I believe this violates 16.090-POL-2, where cops in uniform performing traffic stops are required to have their cameras on.

Edit 2: I did not get a confirmation email though.

Edit 3: had to email them again to get a complaint number

It might be back tomorrow if you missed it tonight!

I'm looking to try out i2p but I'm having trouble getting it going.

I have a docker-compose container going with this docker-compose.yml:

version: "3.5"
services:
    i2p:
        image: geti2p/i2p
        ports:
            - 4444:4444
            - 127.0.0.1:6668:6668
            - 7657:7657
            - 54321:12345
            - 54321:12345/udp
        volumes:
            - ./i2pconfig:/i2p/.i2p
            - ./i2ptorrents:/i2psnark
        restart: always
        environment:
            - IP_ADDR=0.0.0.0
            - JVM_XMX=1024m

The container starts up and the log outputs:

$ docker logs i2p-i2p-1 
Starting I2P
[startapp] Running in container
[startapp] setting reachable IP to container IP 0.0.0.0
Starting I2P 2.4.0-0

But when I try to access the console, I'm seeing:

$ curl localhost:7657
curl: (56) Recv failure: Connection reset by peer

Is there anything else that I need to do here?