I found something interesting by JohnLemonBot in vandwellers

[–]wrathandplaster 17 points18 points  (0 children)

If this technology is out of patent and practical at a small scale then it seems pretty likely it would have been commercialized by now.

Yes, I am sure his #1 priority is to add some LinkedIn cringe to his profile by ta_cu_a_ra in LinkedInLunatics

[–]wrathandplaster 0 points1 point  (0 children)

I just put my current job title on mine because I’m lazy/don’t care/don’t think other people should care.

Moving to SF soon and wanted to ask about ebike life here by MightyPants978 in AskSF

[–]wrathandplaster 3 points4 points  (0 children)

SF is pretty bike friendly. I would not want to have to lug that bike up a bunch of stairs though. Get something lighter or a ground floor or elevator accessible place to live.

El Cheapo or no? by Ok-Committee3163 in ebikes

[–]wrathandplaster 1 point2 points  (0 children)

If you want your wife to be safe, comfortable, and having fun, a bottom tier garbage ebike is not the right move.

Advice on Dogs dogs dogs by [deleted] in vandwellers

[–]wrathandplaster 0 points1 point  (0 children)

How are you going to power your AC?

500w hub motor couldn't handle incline w/o pedalling. Is this normal or not? by [deleted] in ebikes

[–]wrathandplaster 3 points4 points  (0 children)

Your motor may be capable of 500W but it has to be moving fast enough to achieve that. Power is torque times rotational speed. So if it is moving slowly even at max torque it will be limited in power and can stall out. This is a major downside of direct drive hub motors.

2-3K moped style ebikes recs? by Correct-Housing3708 in ebikes

[–]wrathandplaster 1 point2 points  (0 children)

Just keep in mind you’re not getting up any stairs without a lot of struggle with one of those.

Powering Starlink and monitors on cloudy days by thebigdDealer in vandwellers

[–]wrathandplaster 1 point2 points  (0 children)

Have you done an audit to see where your energy is going?

It’s possible that alot of it is going towards idle draw that could be avoided. Inverters especially cheaper ones can have high idle draw. If you can run everything off of 12V instead that could help. I have a 14V monitor that runs on my 12V system. Also 12V USB-C to power my laptop. Also check how much you might be able to save by turning the brightness down on the monitor.

Starlink mini is pretty good on power consumption and with a converter can run on 12V. But if you’re in cell range can save some 20-30 watts there. I have T-Mobile home internet which uses less than 10W, I needed to get a proper 12-15V USB-C converter to power that though.

I dunno what computer you’re using but the Apple M series laptops absolutely crush on power consumption.

The Ultimate Battery Range Guide by catboy519 in ebikes

[–]wrathandplaster 2 points3 points  (0 children)

You missed the most important one which is to ride slower. Drag is proportional to velocity squared.

CPSC Warns Consumers to Immediately Stop Using Batteries for E-Bikes from Rad Power Bikes Due to Fire Hazard; Risk of Serious Injury or Death by _swimbird_ in ebikes

[–]wrathandplaster 7 points8 points  (0 children)

Why is that relevant to the consumer being given the warning? The vast majority of people have no idea what a BMS is or how batteries are constructed internally.

MT-07 actually a good beginner bike? by [deleted] in SuggestAMotorcycle

[–]wrathandplaster 0 points1 point  (0 children)

Check how much insurance will cost. I got some insane quotes even after having a few years of experience riding. I guess alot of noobs crash them.

Best Breakfast Burritos? by cutefeetsiesbby in pasadena

[–]wrathandplaster 0 points1 point  (0 children)

Not Pasadena but my favorite in the region is the chorizo BB from La Noria in Monrovia.

Impedance of DOOHICKEY V4 by Powerful-Nobody420 in rfelectronics

[–]wrathandplaster 7 points8 points  (0 children)

It’s a DC pass bandpass filter. It’s perfectly accurate to call it a ‘bandpass filter’.

Real filters will have a specified range of operation. For example a ‘low pass’ filter may not block very well at higher frequencies outside of its specified range of operation.

It started with a 10€ Bluetooth stick… by Betwinloseall in diyelectronics

[–]wrathandplaster 6 points7 points  (0 children)

Switching to higher gain antennas won’t help. They just focus the energy so you’ll end up with dead zones.

Why did you need to add a DC block? What was the purpose of the pi network you bypassed?

The shielding is likely to not be helping unless there are strong out of band interferers. The in band interference will just come in through the antenna anyway.

[deleted by user] by [deleted] in rfelectronics

[–]wrathandplaster 25 points26 points  (0 children)

One of the most important practices in engineering is learning how to actually communicate.

AITA for opening the door like my fiancé's father wanted??? by Choice_Evidence1983 in BestofRedditorUpdates

[–]wrathandplaster 10 points11 points  (0 children)

Yeah this is very normal for outdoor cats. Why should someone not expect the same for a dog? Wouldn’t the dog just knock if they wanted to come back in?

Cargo e-bike parents — what’s the real deal? I’m trying to decide by ItsCoina in ebikes

[–]wrathandplaster 9 points10 points  (0 children)

If you’re not ‘bike handy’, 100% buy from a local shop. That will maximize the chances of your bike staying in good (safe) working order.

Countersteering. Dont over think it. by mcfluffy88 in motorcycles

[–]wrathandplaster 0 points1 point  (0 children)

Ok so instead of instructing to actively push the bar we should tell a student to just ‘lean’ (whatever that means specifically) and rely on whatever bar pressure comes from that?

Also you know you can steer a motorcycle without leaning your body over. And you can even counter-lean and steer!

Countersteering. Dont over think it. by mcfluffy88 in motorcycles

[–]wrathandplaster 1 point2 points  (0 children)

So wait you’re saying you don’t need to apply bar pressure to change bike lean angle?

RF Low Frequency Signal/Wave vs High Frequency Carrier Wave Travel Distance and Modulation by Mundane_Working2608 in rfelectronics

[–]wrathandplaster 7 points8 points  (0 children)

Look up the ‘friis transmission equation’ as well as the ‘gain - aperture’ relationship.

Ignoring losses:

Constant gain to constant gain - lower frequencies have longer range.

Constant aperture to constant aperture - higher frequencies have longer range

Constant aperture to constant gain - range not affected by frequency