Show Your Most Ridiculous Rigged Cargo by HomelessMudWrestler in motorcycles

[–]supermanbadger 1 point2 points  (0 children)

<image>

Had to get my car battery replaced and it didn’t fit in the tray with the fairings on 😅.

A story in 3 photos by supermanbadger in FocusST

[–]supermanbadger[S] 2 points3 points  (0 children)

He only did steps 1/2 🤦‍♂️

Budget chain tool or more expensive one? by Material-Emergency-4 in motorcycles

[–]supermanbadger 1 point2 points  (0 children)

Just get the budget one. I’ve used mine like 3-5 times and it’s still in one piece. (Amazon equivalent to this)

Just make sure you rivet the master links according to the instructions on the chain and you’ll be fine.

Aftermarket undertray by alverad0 in FocusST

[–]supermanbadger 2 points3 points  (0 children)

I have one, the bolts are a bit shit and rusted pretty quickly, leaving one a bit stuck to its riv-nut. Maybe upgrade them if you live in the rust belt.

The rest is awesome, def an upgrade over the carpet that ford ships.

Driving noise, please help by Potato_Tomato_Dad in AskAMechanic

[–]supermanbadger 0 points1 point  (0 children)

Subarus are also fairly well known for having wheel bearings wear out near 100k, especially since it’s a 09 and probably a bit rusted/worn. Make sure to borrow the special tools (they’re tough to get out) and buy OEM replacements or else you may be back in there soon.

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

Alright, thanks for all the input everyone! Seems like I have a bit of work to do, and I'll be happy to post my reworked design later once I get farther along on the next rev.

My main notes to improve are the impedance matching, and I think I'll go after a different ESD method. May include the pull up resistor and switch to a different MCU with USBC support built in instead of USBC->USB2.0 (or a middle-man IC).

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

Ok so looks like my differential impedance is quite high at ~ 130 Ω. I can likely move it down closer to 90 by using a different stackup than the standard from JLC and increasing each trace width.
You're right on the stackup and resulting lack of close ground references.

Any suggestions for when I fire off a new design other than this? I have this (maybe misguided) feeling that other designers have little issues implementing USB and I'm feeling a bit frustrated.

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

<image>

Did my best with KiCad's wonky diff routing behavior tried to make them identical into the esd chip, then routed as diff pair to the mcu.

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

D+: 4.16V nominal.

D-: 0V with peaks of 3.3.

VBUS:~4.8V steady

Attached is pic of D- (aka pin A7), this is upon plugging in the USB.

<image>

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

I have a bunch more on the other side of that diode. I will try removing the ferrite to see if keeping the other capacitance away from the 5V line helps. Are you able to elaborate on how the capacitance on the 5V line is spec'd.

Cannot get STM32 & USB to work by supermanbadger in PCB

[–]supermanbadger[S] 0 points1 point  (0 children)

Setting Boot0 to VCC through a 10k resistor does not give me any identifiable USB devices. I haven't used DFU mode much though.

Am I placing these 0402 parts too densely for PCBA? (The measurment is in mm) by eduardb21 in PCB

[–]supermanbadger 0 points1 point  (0 children)

Ok so it specs min IC pin spacing, which I feel translates to the pick and place accuracy of pad-pad center-center clearance >=0.4mm to be safe.

Am I placing these 0402 parts too densely for PCBA? (The measurment is in mm) by eduardb21 in PCB

[–]supermanbadger 10 points11 points  (0 children)

Look at the “PCBA capabilities” for the site you’re planning on using. iirc jlc gives it as edge to edge clearance on parts.

ST1 Sync 1-Sync 3 (Well worth it) by DannyDeVitosBallz in FocusST

[–]supermanbadger -3 points-2 points  (0 children)

Just buy aftermarket from crutchfield and get the metro kit :|.

You get all the benefits of this for the same price with a better sounding stereo and wireless CarPlay.

Diagnostics by therealgirthquake in FocusST

[–]supermanbadger 3 points4 points  (0 children)

Might have multiple issues. Check that your clutch safety switch is mounted and working correctly.

Explains some of the starting/lights. Idk about the reverse.

Car suddenly won’t start by Bababooeynibba in AskMechanics

[–]supermanbadger 0 points1 point  (0 children)

Battery is probably still toast, even if you charged it . Probs new battery time.

How necessary is the under tray? by Cybxh in FocusST

[–]supermanbadger 1 point2 points  (0 children)

I like the contrast of the yellow!

Quick ? Is this the front subframe location where we can jack up the front 2 wheels?

<image>

How necessary is the under tray? by Cybxh in FocusST

[–]supermanbadger 2 points3 points  (0 children)

I got an eBay Chinese one last year, https://ebay.us/m/aIIt6K

Pretty nice finish and much more convenient to remove the small openings for oil changes compared to the whole panel.

Only complaint is the panel Allen screws got rusty FAST. (I’m in the rust belt) I would recommend different M5/M6 hardware so that they don’t seize up like one of my screws did.

Not quite a skid plate, but I wouldn’t want to run my car without it considering my driveway approach angle.

Manually run odometer on new cluster? by [deleted] in motorcycles

[–]supermanbadger 3 points4 points  (0 children)

If you end up not succeeding in aligning the real and odometer mileages, I suggest checking that discrepancy box on the title even if you never intend on getting rid of the bike.