I would be faster, if the tills didn’t have a bloody delay after placing the item in the bag, before it will scan the next one.
TWeaK
- 0 Posts
- 11 Comments
TWeaK@lemmy.todayto Dull Men's Club@lemmy.world•This is what remains of the industrial deli slicer I salvaged. It's neato and heavy1·14 days agoNot quite. A commutator kind of pulses the supply to the rotor, eg a brushed motor would have two brushes up against the commutator, the brushes deliver DC voltage which energises a coil, creating a magnetic field that pushes against a stator that’s made of a permanent magnet. This rotates the rotor and commutator, which then moves the brush around to the next contact on the commutator, engergising a different coil so that the next coil pushes the motor around. The brush maintains a constant DC voltage, but the commutator connects this to different coils as it rotates.
This is a DC brushed motor, with windings on the rotor and the stator is just magnets:
And this is a commutator on top of a universal motor (which can run on either AC or DC):
The stator you have has its own windings, so it would be the stator that pushes against the rotor in that motor, rather than the rotor pushing against the stator like the brushed motor. So you just need to supply an AC voltage to the stator windings and you’ll get a rotating magnetic field, which can then move things inside with their own magnetic fields, eg a magnet, or the rotor it came with.
I wouldn’t really suggest doing this though hah. For starters, messing with supply voltages and bare windings can be very dangerous, and second if the magnet isn’t balanced it could fly out. And I’m sure there are a bunch of other risks as well lol. There’s also no telling why the motor didn’t work anymore, and it definitely won’t work as well as with the rotor that was designed for it.
Here’s some fun with a mitre saw motor: https://www.youtube.com/watch?v=iTcjMKs5mek
TWeaK@lemmy.todayto Ask Lemmy@lemmy.world•What are things that are illegal today that could become legal in 50 years?101·18 days agoThere’s more money to be made keeping it illegal. More risk, more reward.
Most of the UK illegal weed is produced by a monopoly producer. There’s the odd hippy growing their own, but the stuff the most prolific dealers sell all comes from the same source, up and down the country.
TWeaK@lemmy.todayto Fuck Cars@lemmy.world•Good public transit > self driving carsEnglish2·18 days agoCopenhagen pretty much has this. So easy to get around everywhere.
TWeaK@lemmy.todayto Programming@programming.dev•AWS deleted my 10-year account and all data without warning2·19 days agoEh, the author definitely has more responsibility than he makes out. He’s fully aware that it wasn’t suitable as a backup for all of his stuff (like the book he was writing and all the tutorials), but acts like that shouldn’t matter because he wanted to use it that way to make his desktop workflow better.
TWeaK@lemmy.todayto Dull Men's Club@lemmy.world•This is what remains of the industrial deli slicer I salvaged. It's neato and heavy1·19 days agoThat’s the stator winding of the motor. If you put a magnet in there and hook it up to AC you could make it spin.
TWeaK@lemmy.todayto Dull Men's Club@lemmy.world•Bought a nice simple sprayer nozzle today1·19 days agoExquisite.
TWeaK@lemmy.todayto Mildly Infuriating@lemmy.world•The White House Rose Garden was replaced by pavement English20·19 days agoAlso the actual roses were in the bushes on the side.
I’m pretty sure they did actually get rid of a lot of the flowers anyway and got rid of things they shouldn’t have, but the layout of it isn’t so drastically changed and the lawn can easily be replaced.
TWeaK@lemmy.todayto Showerthoughts@lemmy.world•Age verification and the enshitification of streaming will help reduce the decline in computer literacy in under 18s95·27 days agoIt isn’t about protecting children. It’s about exploiting adults.
A majority of people, both children and adults, will successfully be exploited by this. Even if it is eventually repealed (which is unlikely, there are businesses set up dependent on this - we can’t deny investors their profits!), it’s already happening now.
TWeaK@lemmy.todayto Technology@lemmy.world•Chinese Scientists Create Cyborg Bees That Can Be Controlled Like Drones for Undercover Military MissionsEnglish202·1 month agoThe researchers are hoping that the tiny cyborg could allow the military to infiltrate hard-to-access space or be used in search and rescue missions to find survivors in natural disasters, according to a research paper.
In other words the researchers are clawing at reasons to justify their research. The Chinese military aren’t looking into this, following commands 9 out of 10 times isn’t reliable enough to even start development.
This is about as strategically useful as a bluetooh controlled robo-roach.
You get a discount depending on how you scan.