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stevebattle · 1 year

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FETAL I by William H.T. La (1984). La, pictured above with his wife, was a Vietnamese exchange student when, playing with an erector set one day, he found that by adding wheels within wheels, they could move in any direction. This led him, in 1980, to patent the idea of mounting these omni-wheels on a triangular base. La also managed software development for Topo 1 at Androbot. FETAL I is a three-wheeled robot with each of its wheels arranged at the corners of an equilateral triangle (sometimes described as a "Kiwi drive", though this was developed later). Each wheel is independently driven, rotating about a fixed axis. The wheels have passive wooden rollers around their periphery, arranged in two rows providing an unbroken ring of rolling surface. This enables omnidirectional travel, without need of mechanical steering. FETAL I, in its attractive wooden housing, made its first major public appearance at the International Personal Robots Congress (IPRC) held in Albuquerque, New Mexico in 1984.

#cybernetics #mobile robot #robot #1984 #omnidirectional #IPRC 84

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seshaudio · 1 month

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Omnidirectional build Mk0

I got hold of a cheap little driver in London for £15. It's rated for 200W peak power, 40Hz-10kHz (so sadly not much high frequency once the lamellae are attached!) I removed the rubber sleever and the dust-cap

Next I used some grocery-store plastic sheeting (what they put up promotion signs/prices with) that can be moulded using hot water. I used a metal grille bent into a curve to make curves out of the plastic, then cut them into roughly the right shape. I made the paper shape guide by just rotation a ruler held at one end - this was totally eyeballed and could've been done much better, more precisely etc.

Then I attached some sticky-backed weather stripping to each of the lamellae (aka petals), and used double-sided tape to stick them onto the speaker cone. I used a log with a notch cut into it, attached through the speaker magnet's central hole with a long screw, to hold the tops of the lamellae.

Then with a bit of wiggling and more double-sidede tape I attached all the lamellae together at the top. I used some washing up gloves cut into strips as (very makeshift) gaskets to mostly seal the gaps between the lamellae. Again, I used double sided tape to do this. To be honest that was the most fiddly part. Washing up gloves cut with scissors are not an ideal Radialstrahler gasket material!

And there it is! It doesn't sound terrible on its own, but as the driver is only rated up to 10kHz (and who knows what impact the radialstrahler build has on the theoretical frequency response!) I had to wire it in to an old bookshelf speaker's tweeter to get a bit more high-end.

I'll make another post with a few more videos of it playing, along with some discussion of what I've learned so far to take forward to the next prototype!

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cherry-vennom · 7 months

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All I do is see

#it never stops #all i do is know #sword of truth #perspective #awareness #multidimensional #higher consciousness #the onslaught #claircognizance #reverie #epiphanies #she speaks #omnipresence #omnidirectional

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morgan-ingland-limited · 4 months

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yourfreesounds · 2 years

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My lil pet 🐶 #soundequipment #audioforedit #soundrecording #fieldrecording #audiopostproduction #capturing #yourfreesounds #handyrecorder #audiolife #makesoundnotwar #deadcat #omnidirectional #videocreators #zoomh5 #zoomcreators #zoomsoundlab (at World Wide) https://www.instagram.com/p/Ch9PYgaKWZP/?igshid=NGJjMDIxMWI=

#soundequipment #audioforedit #soundrecording #fieldrecording #audiopostproduction #capturing #yourfreesounds #handyrecorder #audiolife #makesoundnotwar #deadcat #omnidirectional #videocreators #zoomh5 #zoomcreators #zoomsoundlab

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khanuindia · 2 years

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TVS Usb Barcode Scanner ( BS-i302G )

https://www.kidindia.in @khanuindia

SPECIFICATIONS ‣ Image Sensor - 752*480 CMOS ‣ 1 D - EAN13, EAN8, UPCA, UPCE, ISSN, ISBN, Codabar Code 128,Code 93, ITF6, ITF14, Interleaved 2 of 5 Industrial 2 of 5, Standard 2 of 5, Matrix 2 of 5, Gs1 Databar, Code 39, Code 11, MSIPlessy, Plessy, etc. ‣ 2 D - PDF417, QR Code, Data Matrix,Chinese Sensible Code ‣ Resolution - 6.67 mil (PDF 417), 5 mil (Code 39) ADVANTAGES ‣ Best Motion capture. ‣ Best in class Frames / Sec rating. ‣ Easy to switch Auto Trigger and Manual mode.

#Barcodescanner #TVS #BSi302g #Omnidirectional #Barcode #Scanner

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johnhooperphotographer · 2 years

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@louise.beer and I are looking forward to trying out our new @lom.label Ucho Pro during our very exciting project next month. . . . . . #australia #bluemountains #soundrecording #sound #soundscape #fieldrecording #lomuchopro #uchopro #omnidirectional (at Bratislava, Slovakia) https://www.instagram.com/p/CdfvoeVsQ1L/?igshid=NGJjMDIxMWI=

#australia #bluemountains #soundrecording #sound #soundscape #fieldrecording #lomuchopro #uchopro #omnidirectional

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yourperfectadvisor · 2 years

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12dBi Wideband Omni-Directional Cylindrical Antenna with 12mtr. LMR 400 Cable N-Male to SMA-Male Connector 698-2700MHz for Wireless WI-FI Router GSM Landline OEM Applications

Price: (as of – Details) Frequency Range (MHz): 698, 850, 960, 1710, 1800, 2100, 2300, 2500, 2600, 2700 MHz, VSWR: 21, Gain: 12dBi, Connector Type of Antenna: N Female, Cable Conductor: Copper, Cable type: LMR 400 Coaxial Cable, Cable connector: N Male to SMA Male, Cable length: 12meters (39 feet), Rated Wind Velocity (km/h): 100, Max power (W): 50, Operating Temperature(C): -40~+60. The…

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#12dBi #12mtr #6982700MHz #Antenna #Applications #Cable #Connector #Cylindrical #GSM #Landline #LMR #NMale #OEM #OmniDirectional #Router #SMAMale #Wideband #WiFi #Wireless

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the-halfling-prince · 2 months

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Shrimp heaven only has one fast food joint and it's the omnidirectional scampi blast

#Omnidirectional scampi blast #shrimp heaven now #mbmbam #The Scamper and Scampi. You get it and go!#Once again thinking about omnidirectional scampi blast #my posts

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durn3h · 2 months

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I've always wondered why so many governments keep investing tons of money into those stupid solar roadways projects when it makes 0 sense to anyone with a brain, but I just realized that it makes sense why this happens.

More and more funding is going into green energy and more and more people are wanting to see their government taking direct action to do something about green energy. There's money to be spent, but facilities require land that the government in most locations doesn't have, but they do have shittons of roads, so the most hassle free way of producing green electricity is to throw down solar panels in the one place they have complete control of the land, and then they get to claim that they are on the cutting edge of the science to appease their voters

#i guess they choose making the roads solar instead of covering the roads because that would be too mundane or something #even though it would be infinitely cheaper more productive and require barely any maintenance #if you did that though youd have boomers complaining that they like the sun in their eyes or rain obscuring their vision or snow on the roa #just put a cover at normal road sign height with solar panels on top put lights on the bottom and heaters in the panels to melt snow #then you keep the roads much more dry and snow free so they will be way safer and will degrade slower #once every so often send out crews to clean the panels so they stay productive #and you get like 20 years of life out of them #it will really cut down on light pollution near roads too #you wont have headlights or street lights that light up the whole sky #noise pollution too by reflecting the sound back down to the road #and you can more effectively light the roads instead of shitty streetlights that are a mile in the sky and are essentially omnidirectional #there arent too many downsides to covering the roads and putting solar panels on them #other than it not being high tech enough and kinda ugly #but roads are already ugly as fuck #so might as well get use out of them

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stevebattle · 1 year

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FETAL II by William H.T. La (1984). FETAL II has a three-wheeled omnidirectional base, similar to FETAL I, on which La (pictured) has mounted a MICROBOT TeachMover robot arm. The wheels are narrower, with a single row of small rollers arranged around their circumference. It won a Golden Droid award at the First International Personal Robot Congress & Exposition (IPRC), Albuquerque in 1984. “Sunday was the day everyone had been waiting for, the awards brunch, Nelson Winkless, the official historian for IPRC, acted as master of ceremonies. After his opening remarks and thanks to the many behind-the-scenes personnel, Nels got down to the most important part of the program, the presentation of the Golden Droid awards. The Golden Droid awards were presented in three categories: the most entertaining going to Bruce Taylor for his robot Henry; the most useful being presented to Reza Falamak and his EZ Mower Robot; and the open award going to Bill H. T. La for his Fetal II. After the picture-taking and congratulations were over, it was back to the exhibition hall for the final afternoon of the show, Although Sunday's attendance was somewhat less than the two previous days, the enthusiasm was still evident.” – IPRC, Robotics Age, Aug 1984.

#cybernetics #mobile robot #robot #omnidirectional #1984 #IPRC 84

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seshaudio · 2 months

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Reviving this tumblr page 10 years down the line, to post some updates on my upcoming Omnidirectional speaker project

In brief: I want to design and build a set of speakers that play high-fidelity, omnidirectional sound, for the primary purpose of running UK/Jah Shaka style dub and reggae sessions.

I'm currently most set on Awassa Sound System, but really like the relevance and cheekiness of Omniscience Sound/Hifi. I think Awassa has a better ring to it, and an air of mystique, even.

Here's a breakdown of the plan so far:

As for order of operations: Step 1:

Make a cheap and cheerful prototype of the MBL drivers. I just want to cut my teeth on the hardest part, to start building familiarity with the materials, principles, and manufacturing processes that will be involved in the build of the larger, final version.

If my friend who's into CAD and CNCing is willing, have him whip up some test lenses.

Use recycled drivers from old, cheap speakers as much as I can to keep initial exploratory costs down.

Find an active cossover unit that I can use to test different crossover frequencies with the different driver designs

Step 1 will be considered finished when I either have a working, not-awful-sounding radialstrahler, or have decided to abandon that aspect and am comfortable focusing on other methods for making omnidirectional sound.

Step 2:

Work on the other parts of the tower, namely the horn-loaded lens tweeter, the mid-bass lens, and the lower cabinet (lots of flexibility for internal design with the cabinet).

The cabinet (and maybe the horn lenses) will require learning to use a speaker simulation software

The bass scoops can come later, as there's not a lot of point building small/low-power scoops

As soon as I have a sense of what the appropriate crossover frequencies will be, order a custom dub preamp such as the RasFX Mini Pre

Get a set of relatively affordable power amps to drive the whole thing. 4 channels for a single tower to start with

Step 2 will be considered complete when I can gift (for cost of materials) a MK1 pair of these speakers to a friend of mine who's into sound system too - and of course build a set for myself!

Step 3:

Assuming everything goes smoothly in Step 2, work on scaling everything up. Size, power levels, etc. The rough goal is to be able to power a party with around 100-200 people. Maybe more, eventually

Try to figure out a way to be able to retain the functionality of a dub preamp for playing reggae, but also run the system in stereo for when I want to play

Build a set of scoop style subwoofers. The more, the bigger, the better!

Step 3, and thus the main body of the project will be considered complete when I have a fully functional, high-power sound system able to at least impress, though maybe not directly 'compete with', the current generation of younger sound systems like Indica Dubs, Ital Power, Creation Rebel, King Majesty, Sinai, and other such outfits.

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Step 4:

If everything up until this point has gone very well, and I feel confident with the various technologies, try to develop the designs to a point where it can stand as a single 'totem pole' style tower that can play to a decently-sized crowd of people.

I picture taking something like that to e.g. Boomtown Festival, and decorating it in all sorts of wacky space-age or mystical art. I think the fung shui of a single, central sound source would be really unique in a festival setting.

The big barrier is that omnis, when places inside, rely on walls and surfaces to create the feeling of 'omnipresence'. Outside, I'm not sure that'd work at all, let alone

Step 4 being complete would inherently require my sound to be powerful enough, high-enough-fidelity, and well-known enough to be included when people talk about "well-established" sound systems. The totem pole thing is a bit of a gimmick, let's be honest.

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Imaginary step 5: If my work on this project can inspire more people to think outside the proverbial speakerbox when it comes to building reggae sound systems, I'd be a happy camper!

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cherry-vennom · 7 months

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Angel

A light in the darkness and darkness itself

😈❤️‍🔥🪬🪽

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morgan-ingland-limited · 6 months

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Access Point Q9H62A

👇👇👇 📌Access Point Q9H62A

🔰HPE Aruba AP-515 (RW) 5375 Mbit/s White Power over Ethernet (PoE)

👇👇👇 Contact Us: 👇👇👇 📧 [email protected] 🔗 https://miatlantic.com/q9h62a

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alliswyattonthewesternfront · 10 months

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you guys ever just think about how camels can kick in all directions. why would god let them do that

#no beast should have that much omnidirectional power

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dictee · 1 year

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For Nicki to have the same background as the books it would be difficult to make him look similar to Louis ofc but they could also just change his family history like they did to Louis I guess. There were black Frenchmen during that time who specifically were prominent in the arts (Chevalier was a violinist!). Or they could make him look vaguely Mediterranean also since Gabrielle is from Naples and that's probably how she looks.

They obviously could not do the Antoine/Louis twinsies thing cause that would've been VERY creepy on Lestat's part.

oh yeah i dont mean to say that there werent Black people in france in the 1700s but i dont think specifically that they'll cast nicki as Black just to draw a visual comparison w louis like that doesnt make sense for a show that has already demonstrated color consciousness. also they definitely could have done the antoine character as a replacement louis like in the book i do NOT think theyre shying away from lestat being a creep. but i think it adds a lot that she's a white woman it juxtaposes them in a different way where louis SHOULD be in the privileged public position at lestats side but isn't because of society and antoinette COULD occupy that position and be accepted but instead is the one hidden away out of town. grounds for crazy levels of resentment

#Also i think to an extent they r sort of doing the proxy thing for a second with miss lily #like she doesn't look identical to louis obviously but they have the same coloring #which makes this really interesting dynamic where louis and lily understand their class positions to be totally opposite #louis is a pimp and in his interactions w lily he's a customer. he's a wealthy man. he's an 'exception' and a holdover from a time where #there were more clearly stratified positions for people of color in society #but lestat completely bulldozes over that with this kind of omnidirectional consuming gaze #where louis is as much a pretty thing to be acquired as lily. see: 'miss lily proved a poor replacement.' and the emphasis on 'cinnamon'#(🤢) as a flirtation that applies to both of them #iwtv

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