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Silly hardware wishlist

Too simple for a project page & which may never happen.

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Replacing the TOSLINK on the ultimate amplifier with USB which can be captured.  It could finally be plugged into multiple computers instead of the 1 with the TOSLINK output.  There is an ancient STM32 discovery board which could be dropped in.

Something which can measure the duration of long delays down to the microsecond, but that might evolve into a super oscilloscope of some kind.  It would measure delays up to 1 second.  It would be USB controlled.  The mane problem with a super oscilloscope is the low I/O speed of a microcontroller & small memory buffer.  The best microcontroller would be limited to buffering maybe 1megbyte at 40Mhz.  Buffering over USB would be limited to 1.5Mhz.  It could capture long delays down to 1us.  

Capacitive multiplier for the preamp.

  • Smallest possible RC toy

    lion mclionhead01/06/2024 at 21:32 0 comments

    The lion kingdom discovered RC with a zip zap micro toy someone brought into the day job.  It could almost go the length of a hallway on a charge, some 350ft based on a goog earth photo of the building.  It was quite addictive to discover how far something that small could be made to go.  Then came the even more addictive picco Z in 2006.  The addiction to that was from achieving the most stable flight with the least controls.

    Something about the micro toys seemed addictive in ways none of the larger vehicles were.  It might have been trying to get the maximum ratio of range to size.  Lions just outgrew the toy problem & transitioned to using RC parts to solve bigger problems after 2006.  Then there was a home made toy that was self propelled but not RC.

    The whole thing got lions pondering what the smallest possible RC thing would be.  Below a certain size, wheels aren't practical & solenoid driven jumping becomes more practical.  Habayusa 2 used hopping rovers.  It takes lions back to the photovore craze.   The minimum system would be a big solenoid actuator & a weight shift mechanism. 

    The free flight craze came along & revealed the minimum solenoid actuator.  There was no practical linear actuator.  3D printing made these infinitely easier to make.  There could be 2 rotating actuators forming a linear motion but it would be big. 

    Suspect the material that it travels on is just going to be limited by the size & it's just going to be 2 big solenoid plungers for motion, a battery, & a brain. 

    It's a pretty tough problem, since you're trying to create the most reaction force in the smallest space.  Early biological machines used thousands of hairs. 

    https://www.newsdirectory3.com/japans-first-lunar-rover-to-be-sold-to-the-public/

    This might be the smallest moving thing currently made. 

    It's got the full phone app, camera, collapsing ability but something that just drives around could be a couple pager motors.  A good old commutator is still smaller than a solid state motor controller.

  • USB power delivery hack

    lion mclionhead12/17/2023 at 03:24 0 comments

    The lion kingdom has 2 USB  power supplies capable of arbitrary voltages.  For just 1 application, it's not economical to buy an off self power delivery chip when a dedicated power supply is the same price.  It would be economical to make the application circuit negotiate the voltage on its own.  So far, there are no open source implementations of the protocol. 

    The only search terms which work are "usb c power delivery breakout".  Anything else causes the goog to spit out garbage.

    https://community.element14.com/technologies/power-management/b/blog/posts/usb-pd---cc-decoding-adventures

    What little information there is has people trying to reverse engineer it instead of bothering to decipher the spec.  It seems to be a 1 megbaud RS232 signal on the CC wire.  The high voltage is 1.2V.  The 2 sides pull the wire low to communicate in both directions.  The application circuit would always depend on its own voltage regulator & the configured USB voltage would be for powering a load.  It wouldn't be capable of eliminating the voltage regulator.

    Another guy got a bit farther with a $1300 Lecroy. 

    https://www.reclaimerlabs.com/blog/2017/5/16/example-usb-power-delivery

    Lions noticed the crown of test equipment going from Tektronics to Rigol & now Lecroy.  The guy graduated in 2008, worked for Jeri Ellison at CastAR,  went on to all the top tier companies, started working with USB 3/C right when it 1st came out in 2016.  Every generation starts out at whatever the latest thing is & that becomes their ground zero.  There's no such thing as paying your dues with USB 1.

    https://www.adafruit.com/product/5807

    https://www.amazon.com/Dweii-Trigger-Module-Charger-Delivery/dp/B0BY8H5MS1

    The current best price of $10 for 5 chips would only be affordable if there were at least 2 applications.  Then the cost per power supply would be $5.  The mane applications now would be powering 12V LED tapes, a 12V audio amplifier & 12V audio recorder.  Those might be all that's needed to justify an off the shelf solution.

    The starting point for an implementation would be to sniff an existing circuit.  The general idea is no matter what, USB power delivery needs a high speed front end to access the 1.2V 1 megbaud serial signals.  There might be a way to use a complimentary BJT circuit to boost the 1.2V to 3.3 but no-one is doing it.

  • Cyber lawn mower

    lion mclionhead11/15/2023 at 22:09 0 comments

    When the lion kingdom runs out of money & has to go off grid, the tractor or lawn mower is going to be a key component.  The vision is to replace the panels on a stock tractor with cybertruck stealth panels.

    Always the one to miss the obvious, big industry had a cyber kid toy for years.  It might have been a licensed toy from a Chinese company or it might have been too complicated to make a lawn mower.  Lions figured if someone really had to make money, they would make a cyber lawn mower. 

    There's not much to cyber truck panels.  It's manely just a pyramid for a hood, a pyramid for a roof, a linear headlight.  The hardest parts are the fenders.  Those need segmented & sheered panels.

    It would have to be metal fabricated. 

  • Hot glue gun that works

    lion mclionhead11/04/2023 at 23:16 0 comments

    Unlike Ben Heck's famous project, this would not involve a motor.  The key innovation required is a way to back out the glue.  Instead of a trigger, it needs a grip wheel that rotates both ways.  Maybe it could be based on a steering wheel from an RC  transmitter.


    The 2nd innovation is a fine point tip.  There would be a fine point & a standard point but this would require 2 guns.  The wheel might be possible in PETG.  The fine point tip requires metal fabrication.  Theoretically, if the glue never heated above 200C, a standard glue tip could be drilled out & there could be a tube soldered on the inside.  Some minimal TIG welding seems to be inevitable.

    A stretch goal would be PID temperature control so it could heat up fast.  That could be done with a triac & an existing gun.

    Previous experience showed backing out glue causes the stick to stretch.  It would only be backed out slightly to keep it from running out.  Then, the very end of the stick would not be recoverable.  Lions have long dreamed of a way to fuse 2 glue sticks but there was no way to make it strong enough without creating a bulge or misalignment.

  • Cross country run truck

    lion mclionhead10/30/2023 at 23:04 0 comments

    Regained enough energy to watch Duze's Sweden bike packing ride.  It inspired lions to ponder a cross country version of heroine truck.  This version would be 3x longer than the existing truck, slightly taller & wider.  It might be a dogsled with wheels.  It would have 60W of solar generation on top.  It would have 2 scooter traction motors & 2 front steering wheels.  It would have a rear handle bar for manual pushing.  It would need some minimal off road capability.

    The motors could reconfigure for dynamo mode to recharge.  It could also recharge from manes. 

    It would have the existing leash mode & RC mode with heading hold.  It would have dual RC transmitters.  For dynamo recharging, it would have a manually pushed or pulled mode with heading hold.  It could have a variable resistance mode where the motors provide a configurable amount of power in addition to animal power.  This would go all the way down to full dynamo mode.  The variable resistance & manual traction modes would require a robust leash design capable of transferring loads.  The fully extended leash would transfer the load or there would be a second cable parallel with the leash.  Leash traction mode might provide the off road capability.

    In the worst case, it would have shopping cart mode with no electrical needs & no steering linkages.  Not sure if this would require reconfiguring the front into castor wheels or using handle bars.

    Then, there's no practical way to really use it.  Lions could remotely imagine driving it to Tracy & Yosemite on test runs.  Lions can't take many days off to do such a run.  The shortest destination justifying it would be Martinez.  

    The problem with Duze & Sweden having 5 weeks off every year is they're part of NATO.  Someone else on the other side of NATO has to work 52 weeks/year to pay for the military that allows Sweden to have 5 weeks off.

  • Automatic faucet that works

    lion mclionhead09/05/2023 at 02:07 0 comments

    Something no-one cares about enough to study, but the reason automatic faucets have never worked is because they have to detect a paw in the same place they spray water.  There's no way to know, once they get going, if the paw is still there or if it's just water.  They might have lowpass filters & try to detect a subtle decrease in reflectivity of a paw being removed, but this has never worked. 

    The easiest solution is to have water spray for a preset amount of time, turn off before the next sensor reading, & start up again.  This might be what some of them did, but still failed at because the instinctive reaction of an animal is to remove his paws & try again when the water stops.  Another idea is to have them spray like a machine gun, taking rapid sensor readings. 

    All proximity sensors are vulnerable to their threshold values rising over time & eventually shutting off when a paw is present. Decreasing the frequency of the sensor readings could require the ambient value to be more responsive to the fewer times it's sensing & be more prone to prematurely shutting off.

    They're supposed to oscillate at 38khz to cancel out ambient light, but the on threshold is going to constantly adjust to the expected reflection of a paw.

    The final solution may end up being a waterproof camera which just identifies a paw.  There's also adding more sensors elsewhere in the sink, but this gets expensive.

    Paper towel dispensers have an easier time.  If something is there, don't dispense.  If nothing is there, dispense.  Some of them are designed to only dispense when a paw is there & these always fail.  The idea is animals take less product if the product isn't in a default state of being dispensed.  The trick is they have to go from a state of nothing present to something present before dispensing, then wait for something present to go to nothing present to reset.  The nothing present state has to last long enough to reset it.  If the animal puts his paw back in too soon, it won't detect the nothing present state.

    This is a job for Technology Connections.

  • Folding kayak

    lion mclionhead08/18/2023 at 22:17 0 comments

    There have been attempts at folding kayaks but lions believe a game changer would be a rigid kayak that folded in 2 like a folding bike.  The watertight joint would be the hard part. There could be 2 rigid halves bolting together without a watertight joint.  A flexible rubber skin would wrap around the entire assembled kayak.  The rubber would be the thing which folds up, but it wouldn't need any structural rigidity. 

    The focus of this is just to make it fit in a vehicle rather than to be the most compact possible or the fastest to assemble.  The Oru kayaks are like a solution in search of a problem.  If the stiffness & the water tightness are provided by 2 different structures, the problem gets a lot easier.

    It turns out most of the folding kayaks are a skin on frame design.  The goog only hit Oru for some reason.  Accessing the ocean requires a heavier one.  The only one with a working link is https://longhaulfoldingkayaks.com/

    They're $5000.  All the ocean destinations have kayak rentals.  Only the small lakes don't.

  • Foot massaging robot

    lion mclionhead06/15/2023 at 21:29 0 comments

    A robot which gently brushes the underside of a paw with a feather or a brush.  It would be similar to a scalp massager but easier to construct & less prone to injury.  It would sit on the floor.  It might be a practical use of sonar.  The key to all brushing robots is the ability to apply a constant force for all distances.  It could be just an excuse to build a robot arm. 






    A lion would want to use a paw massager while standing. It makes it tricky to position the paw. It's almost easier to have the massager face forward & the paw to face back while sitting on the floor.

    The easiest way for a robot to access body parts higher up is to mount it on a telescoping pole from the floor to ceiling. Lions have used telescoping poles to store stuff near the ceiling without drilling.

  • Single paw controlled skateboard

    lion mclionhead06/12/2023 at 02:18 0 comments

    The 10 year long affair with single paw controllers got lions wondering why the concept was never applied to skateboards & scooters.  They still require a handlebar or the operator to balance & don't have any auto steering capability.  A skateboard by now should just be a fixed platform that the operator commands to turn & move with no physical coordination.  The single paw controller has always done this well.

    The key innovation is going to be a steering mechanism.  10 years ago, there were no good ideas but skid steering.  The big thing these days is the swerve drive.  They have 1 motor for traction & 1 motor for steering.

    https://wcproducts.com/products/swerve-x

    It would be unpowered & front wheels only.  The swerve drive is just tall.  A lot of the parts are just to power the wheel.  This one has the motors on the side.

    This one has the motors on top, like most of them.  The rear wheels would be conventional powered skateboard wheels.  Lions are nowhere close to building one.

    Because of the size of the swerve drive, it might be a triangle skateboard.  The traction wheels go in back & the steering wheels go in front with some kind of elevation.

  • Windowless house

    lion mclionhead06/07/2023 at 18:13 0 comments

    Reviewing that failed Disney hotel, lions noted from the auto recommender that windowless hotels simulating spaceships have become a thing. The only way to find out what the disney hotel was is of course the gootubes.  There's a vijeo of the top end room & the bottom end room.

     It seems depressing to live in a tiny room with no windows & TV's simulating windows, but maybe it's the future.  A key construction cost is the framing to make up for the giant holes created by windows.  For 3D printed houses, the windows require building supports out of stick frames.  TV's might be good enough to do the job.  The limiting factor still might be the cost of the TV.

    Not shown by any gootuber is that all the Disney parks are on a bunch of islands comprising the southwest of Orlando.

    The only exterior view is a warped satellite view showing a nondescript building with the artistic entrance.

    It's well hidden from the guest experience.  Maybe bland warehouse buildings which project virtual palaces of Versailles on TV windows are the future.

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Starhawk wrote 04/25/2020 at 05:37 point

Seems relevant --> https://i.imgur.com/aLKt7Of.jpg

;)

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Daniel Dunn wrote 03/15/2019 at 08:10 point

Have you heard of Yggdrasil? A network of solar powered mesh repeaters with commodity long range WiFi hotspots plus long range microwave links for the super long distances seems like it could be a great way to extend the range.

Organizations the size of ham clubs could probably set up 25km 100mbps links without too much difficulty if they had line of sight, and people who wanted to use them could do so via the public internet or via directional WiFi, all transparently, keeping the same IP no matter how you connect.

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