h4nd

Would dearly loved to have seen the helmet double take as this flew by (ext LR cam pleeeese? ). Would totally suit a set of Mad-Dog Pizza livery (I'd pitch in for that).

Yeah anyways , @Lord Gruntfuttock's thread here https://oldschool.co.nz/index.php?/topic/64444-lgs-ebike-prob-never-happen-project/page/2/ has been most useful, I have some BMS troubles. a 100Ah 3s LiPo a customer bought a few years ago is giving trouble. A bad loose wire clipping in the charger finally blew it up, so I bought a Jaycar brass monkey, because perfect specs, but: It only charged for an hour or so, then the BMS disconnected, I fell to 0, V went up to 12.6V, but would sink to 10.5 when disconnected from charger. I dug into it, and it's out of balance, 3.9V, 3.38, 3.6V - ooookay, it's got one of these in it https://www.aliexpress.com/item/33018801124.html, which should have been balancing it (only at ~50mA, as was pointed out in LG's thread). But the LED is on ("is equalised") for the middle cells, lowest Voltage! and that's which set has the voltage across the bleed resistors. It's operating backwards, and unbalancing them! (??!?). It's like --- hold one: I should not have to be looking in here: http://www.si-semic.com/upload/1460800283.pdf okay, these guys https://www.qskj.cc/shop/product/3-4-5-series-100a-polymer-12v-lithium-battery-with-balanced-lithium-iron-battery-protection-board-qs-b305abl-50a-79204 have made a nice PCB, but resellers are giving incorrect wiring instructions re charge vs power connections?, and no-ones talking about setting the SET pin to get 3s 4s 5s selection. GAH By chance, 3 of these arrived in the mail this week, so I've cobbled one together on my bench. It's shining the light for the high one, which it's discharging (correct). Maybe the BMS in the big battery did shit itself when the PSU blew? Shoudn't have. Ah well. May just throw a spare at the big batt, and see what happens. Tomorrow. err, today.

Cryptography bullshit also enables BMW locking you out of the electric sets which are already in your car, that you paid for, except if you pay them a further $18/month (until folks start setting up guillotines outside their offices, and they backed down). and USD$500/ year for OnStar (not now optional) for a few USA brands. and $8/month to use your toyota remote start from the fob. and auto high beams (yes, all the hardware is already there, pay to use it pleb). Tesla, $10/month for music streaming and sat nav. Whut? I'll let them have the cost for the fast accel performance, of course that puts more wear and tear on the car, which they'll have to cover under warranty - fair. but SAT NAV, on a fucking CAR???

^yes, re power supply, but you still need to get from 600V at 0.1A down to 22V ac at 3A for the speaker, so prob still need the audio output transistor (unless you're rocking electrostatic speakers, but they're very rare). ^Volume control mod, yes, genius!

That is indeed charming looking, but is only the rectifier (not an amplifier)

https://www.aliexpress.com/item/4001066299107.html

Oh LoL: Should really be tagging @kempy and @Ned in here, they have accumulated wisdoms (and parts stashes)

Also, Public Service Announcement: High voltage dc power supplies for valve amps are notably dangerous. Use safe working practices like clear easy off switches, properly grounded chassis, isolation transformer and having someone in the workshop when fecking with the nasty bits.

Cool, have a go. I see this one has an LED under the tube, for extra heater glow? (LoL) https://www.aliexpress.com/item/1005005125142338.html I don't see audio transformers in the kits I've glanced at, and I suspect a lot of the sound you liked is in the big valve power stage with the 300V to 8ohm iron output transformer, but, have at!

I ah, have a set of photocopies of Marshall etc circuits (hand drawn - no less). May include marshall valve amp circuits. Want me to scan some up? Shit, come to think of it, I prolly have some valve transformers and caps lying around in the junk bins. One channel may have used an old TV knob, which went to 11

Closer. The root cause is putting software crypto locks on things, and not giving the crypto keys to the owner. Manufacturers can literally prevent any competition, high quality or not. It's exactly the same crypto chip. See also: John Deer parts replacement, McDonald's icecream machines, artificial retinas after the Co goes broke, etc. Have you noticed you can't buy any software for your iPhone except through the Apple Store, so Apple get to clip the ticket for 30%. Of that entire fucking industry segment.

Wait 'till you see the price of the security chips: https://octopart.com/search?q=pcf7946ac&currency=USD&specs=0 (Yep USD$3) - I'm kind of surprised the dealers aren't burned down on a weekly basis.

Car hacking (some, from VIN only) https://samcurry.net/web-hackers-vs-the-auto-industry/

Rat test -ve. Breath alcohol +ve in 3 . 2 .. 1 ...

I have a 5YO in the house, by definition, I'm probably a plague carrier. I'll do a RAT test in the morning.

I have a couple of phones with NFC (and various dodgy software), but you'll have to find some data to stick on 'em?

We could adjourn to @Blingplaza? I'll bring the finger sander and angle grinder.

Oookay, let's try for Frideee arvo?

Ah yeah, knew this was coming eventually: (the chinese in the comments)

Water at 15psi boils at 125C, not sure how far antifreeze pushes that? Also, heat moves due to temperature difference just like fluid flow moves from pressure difference. Lots of coolant flow into a rad means a higher temp in the rad, so more temp diff to atmosphere, so larger overall heat flow into the cooling air (will heat the air more, with heat from the coolant, from the engine).

I saw this, and thought it might catch your (related) interest: https://hackaday.com/2020/01/02/roll-the-bones-chernobyl-style/

circuit diagram pics (sketch on napkin, and faxed from your uncles' shop is traditional) of wiring and model numbers of bits rather helps if want opinions.

Whoa! (Sucks teeth). FOUR-stroke! Flaaaaash!

Family are likely staying around Chch a fair bit, so will probably make an arvo or two of doing this. Let's know what days folks are ken on.

I have bought accessories for the tiny BBQ which will be brought in the tiny POS. Am debating updating to a smaller model (cooker) after this outing...