Woodworking angles and edges

Hello, I'm working with some plywood to create the Swords used by the Character Kirito in the Anime Sword Art Online. I've done some woodwork before but my main trouble is that i don't know how to create edges on the wood so that it actually has a blade-edge of sorts. so does anyone have tips to go from having you wood like this: _________  <---top of wood ................| ................| <---side of wood ................| _________|                   ^-------bottom of wood to this? ___ <---top ........\ ..........\ <----edge on side ........../ ____/      ^--------bot all comments appriciated

Topic by CryoFireProductions   |  last reply


How can you tell what an LED's angle is?

Is there a way to tell what the angles of an LED is by looking at it or by looking at the light it gives off?

Topic by mrshow555   |  last reply



shelf brackets for angled wall

I have no doubt this is simple for someone who knows, but... I was to put shelves on a wall that is slanted out from the floor.  I see Ikea has a locking bracket for shelves but I want to put in bigger shelves than that bracket supports.  How do I make a bracket for this situation?  I am also open to other suggestions.  I want the top shelves to be deeper, say 24", and taper down to narrower depths so I can utilize most of the wall. Thank you for any assistance.

Topic by HappyMe35   |  last reply


Axis value to angle conversion

Hello all,So I have been trying to convert the values obtained from pygame joystick value (ranges from -1 to 1) and convert it to angles between 0 to 180 to drive servo motors. Can someone help me with this cuz I have no idea how to do it. Thanks in advanceCheers.

Question by Bhabeshr   |  last reply


Right angle camera lens?

Has anyone made a camera lens that works like a periscope? Something that shoots around corners? They are available commercially (x-tremegeek.com) but it seems like it would be more fun to make one.

Question by brandegor   |  last reply


Why are some resistors soldered on an angle? Answered

Lately I've noticed that some resistors on certain PCBs are soldered not flat, but pointing upwards on an angle. Is there any particular reason for this? EDIT: Sorry for being unclear. I added a photo, which should clear things up a bit.

Question by awang8   |  last reply


Near Wall Wide Angle Projector

Sony will be releasing a 4k projector called the 4K Ultra Short Throw Projector, later this year or sometime in the future. It's a very nice looking setup of having the projector built into a cabinet that sits right along the wall it's projecting on, freeing up walking space. The only problem is it will be $30,000-40,000. I'm curious to see if it's possible to build something that accomplishes the same setup with current projectors, being able to project a decent quality image at a large scale from only a foot away from the wall. 

Topic by chello2k9   |  last reply


acceptable angle of deflection for temporary support

Hi, I am in no way an engineer.  I'm trying to figure out what is an acceptable angle of deflection for a combination frame and hammock support.  I'm thinking of using the the 80/20 t-slot beams.  I want something that is portable, easily assembled/disassembled for moving, and lightweight.  I'm go to make a box in our garden to protect our plants and when the corn is big enough, move the box around to make a hammock support(chicken wire around the bottom part to keep the critters out).  It's basically a box 6 feet wide, 8 feet long and about 6 1/2 feet high. 4 beams to make a rectangle on the bottom, 4 uprights(1 in each corner), and another 4 beams on the top to make it more rigid.  Chicken wire will keep the pests out but let me in to relax until the corn is too high and I move the frame.  :)  I'll put the hammock diagonally from pole to pole; total weight with me and the hammock is about 250 pounds.  It will be anchored to the 2 uprights with 300lb chain at each end. Using the angle of deflection calculator from 8020.net, I found some beams that had 5mm deflection with 150lbs of dead weight in the center of the 6 foot span.  I thought that even if I anchored the hammock to the center of the 6 foot span, that would be 300 pounds, more than the 250 max the hammock and I will be.  And anchored in the center of the beam is the worst case scenario since I'll be anchored to the corners. But is that an acceptable amount of give in the beam?  It's not meant to be permanent.  I won't be in it more than 2 or 3 hours tops. Thanks!

Topic by BobR90   |  last reply


Deriving the maximum range and angle of a projectile

In a thread in the Green group, AnarchistAsian and I were discussing his coil guns. I posed the question of what range he could get, and he asked me to go through the physics derivation. Here it is, simplified to require just algebra and trig.The kinetic energy of the projectile E = ½mv2, gives v = sqrt(2E/m) as the speed at launch. Let θ be the angle at which you launch (θ=0° is horizontal, θ=90° is straight up). Then you can decompose the speed into two components: vh = v cos(θ) is the horizontal speed,vv = v sin(θ) is the vertical speed.Gravity only pulls vertically, so the projectile's vertical speed will be slowed down until it reaches its maximum altitude, then it will fall back until it hits the ground. The horizontal speed will remain constant until it hits the ground and stops. To figure out the range, you need to know the time t that the projectile flies before it hits the ground; then the range is just R = vhtEnergy conservation guarantees that it's downward speed at the end is equal to its original upward speed, just with a change of sign. That also means that the total flight time of the projectile will be half going up and half going down. Once you determine how long it takes to reach the top of its flight, you're done; just double that answer :-)In the vertical direction, the maximum heightH = vvt - ½gt2(you need calculus to derive this result). From energy conservation, the initial kinetic energy in the vertical direction, Ev = ½mvv2 must equal the potential energy at the top of the flight, Pv = mgH:mgH = ½mvv2H = ½vv2/gSubstitute this on the left hand side of the trajectory expression,½vv2/g = vvt - ½gt2vv2 = 2gvvt - g2t2vv2 - 2gvvt + g2t2 = 0(vv - gt)2 = 0vv = gtSo, t = vv/g = v sin(θ)/g is the time to reach maximum height. Double that as discussed above, and you get the range R = 2 sin(θ) cos(θ) v/g.Work out the angle that gets you maximum range by just plugging in different angle values and finding the one that is biggest.

Topic by kelseymh   |  last reply


improvised WIDE ANGLE lens for camera phone

I've seen -ibles on macro lens added to cam phone. I've done this myself. Simple. Is there a way to do a wide angle?

Topic by Toga_Dan   |  last reply


Looking for the smallest wide angle lens I can find

Premise: I have a droid incredible and I love taking pictures with its awesome 8MP camera.  I don't like its depth of field however.  I'm sitting here right now, looking at the camera enclosure, and I'm wondering if I might be able to pop open the red dome of the camera and slide in a tiny wide angle lens.  I've seen the cellphone wide angle lens kits you can buy for things like your iphone, and I actually did buy one for my Zi6.  Worked amazingly well, but even in that small form factor, it sticks out too far for me if i were to use this on my droid inc. Objective: I'm looking for an elegant solution that keeps the wide angle in the enclosure, and can't be knocked off or removed while in the pocket. How feasible would this be?  Would it be possible to find a small enough piece of glass that would give a wide angle view in such a small form factor?  I'm just guessing here, but I'd say the diameter would be 8mm and probably 2 or 3 mm in depth.  Thats pretty tiny... Anyway, I just wanted to get some suggestions from the DIY crowd.  I'll include some pictures of the camera's enclosure to take a look at. Thanks.

Topic by Dotcommer   |  last reply


How to add a right angle gear to a bicycle

Hi, Sorry for the obscure title -- I want to add onto the stardard chain cog on a bike that drives the wheel, but it has to be converted with some sort of right angle bevel gear or similar, so the new cog/gear is facing left/right as opposed to front/back. I need to have a gear spinning left/right to power a linkage that has to in turn power a  setup similar to a wiper motor in a car - this has to sweep from side to side, left to right behind the bike. Any ideas? :( Thanks

Question by rev0lt   |  last reply


could 12 strips of pvc angle trim be used to make a light but fairly rigid box frame?

I need to make a prop, the base of which is essentially an open upside down box of around 75cm x 75cm x 75cm. i was going to use a large cardboard box but it needs to be able to pack down as flat as possible for transportation and needs to be able to survive potential rain. i'm thinking i could drill a hole in both faces of each end of 12 strips of pvc angle trim (the stuff used around windows and doors), bolt it all together as a frame and attach corrugated plastic panels as the box faces. do you think the resulting box would be rigid enough to survive a few accidental knocks and kicks without collapsing? i'm not intending to add any load to the box other than a few blocks of carved foam for panel decoration.

Topic by ambientvoid   |  last reply


How to calculate trajectory of projectile? Answered

How would I calculate the trajectory of a projectile with only the weight of the projectile, the velocity of the projectile at barrel, and angle of the barrel?  How did the artillery operators during WWII know how much powder to put or the angle of the barrel? Thanks for any help

Question by electronicz   |  last reply


Chalk Drawings

Here are some amazing chalk drawings done by Julian Beever. When seen from just the right angle, these drawings have an amazingly 3D appearance.http://hubpages.com/hub/Incredible_Beever

Topic by 1up   |  last reply


Two rotating discs, synced and remote controlled.

I realized that I change the angle of my speakers many times a day and it gets really cumbersome. To use my time better, I thought that I'd be nice to have motorized rotating discs under each speaker, wired so that I could adjust their angle from a simple remote controller on my desktop. This would be because if there's a program, the speaker angles would always remain in sync in relation to one another, and because sometimes the speakers are actually located a bit inconveniently in terms of getting near them to adjust the angle manually.  Take a look at the attached image. I can't get that stupid image uploader to work, it uploads but doesn't keep the file, so here goes:  https://dl.dropboxusercontent.com/u/31684214/Speakers.jpg Before you start criticizing it, don't: The point of the image is to demonstrate a principle. It doesn't tell anything about the room that the furniture is in. It isn't in scale. The sound fields of the speakers aren't trying to portray reality accurately, they're just there to make a point. Everything in the image is a rough sketch and its purpose is to make explaining easier.  As you see, the situation is that sometimes I sit at the desk, sometimes at the back of the room. If I keep the speakers pointing almost straight (like image 2) while sitting at the desk, I feel like most of the sound really "opens up" behind my back only, going past me. If I keep the speakers in 45-degree angle (image 1) but decide to watch videos from the sofa, again I feel like the sound isn't quite pointed at me and it's especially difficult to listen to dialogue. Before you start talking about the room - yes, I know about acoustic treatment and I'm taking it onto account already, but my auditory processing isn't normal so the acoustic treatment alone isn't enough, speaker angles make a huge difference for me. I'm saying this because the internet is full of people who get too caught up on the actual principle and start explaining why they think that I don't need something or don't have a problem with something. From having manually adjusted the angle thus far, I already have the experience of how this makes my life easier. I'm looking for advice/help or someone to make this for me as a service. Due to shipping costs, makers should be in Europe only. Advisors who could guide me through, doesn't matter where you are. I'm guessing that besides the disc parts, the remote control would require knowledge on electronics and coding of microcontrollers. The controller could either have a wheel or simply two buttons, one closing the speaker angle, other spreading it wider. The angle range only needs to change within 90 degrees so that suffices, but the program doesn't need a specific angle limiter made if it happens to be able to turn, say, 360 degrees. Taking ideas of methods, estimates, part choices and possible compensation fees!

Topic by rikuzenith   |  last reply


Can any tiny spy cam emulate the basic human visual range/angle?

I ask because i made a large almost featureless spherical mascot head which i dont want to ruin by cutting a gaping view hole through the front, iv tried the stretched mesh fabric approach but it doesnt look right at all. The current version has a wide slit so my horizontal vision is great but iv got almost no vertical vision, im taller than average and need to see where people around me are around me so i need an improved ability to look downwards. So iv been thinking about one of those tiny spycams linked to a screen mounted inside (perhaps vr goggles), is there a camera with the kind of wide viewing angle you naturally get out of your eyeballs, so i can angle my head down and actually see the ground reasonably close to my feet?

Question by ambientvoid   |  last reply


Superheros are real!

Yes, you read that right, superheros are for real!Everyone said you were nuts, but you always knew it!The official superheros index. Another website bringing superheros together.Here is a look at a few of the estimated 150-200 real life superheros known to exist:Mr. Silent: Probably my personal favorite, he reminds me of batman. A practicer of martial arts, he is considered to be a true masked vigilante. He actually goes around at night, looking for people who are getting mugged, and intervenes.Angle grinder man: He may not be able to single-handedly and totally cast off the repressive shackles of a corrupt government -but he can cut off your wheel-clamps for you.By day an odd-job man, this superhero goes around by night in a blue suit and red cape, wandering around Kent and London cutting the wheel-clamps, or "boots", as they're known in the US, off imprisoned cars. He even has a website you can visit, and a number to call to request boot removal.

Topic by Lithium Rain   |  last reply


LED glow tubing question?

I am thinking of putting some glow tubing on the inside of my 14 foot jon boat, mainly for night fishing. It would also make it look really cool at night. The concept is simple, some of you may know - clear tubing from the hardware store, filled with water, with an LED in either end. This should light it up even if it is curved, right? I want to put long tubes running the length of the boat, on the inside groove of the side runners. That would mean 13+ feet of slightly curved glow tubing. I may have to end up splitting the glow sticks into smaller sections, but would like to see if I can do long single tubes. I'm concerned that the light will fade out in the middle considerably. I'm OK with it fading a little, but I don't want it to be noticeably bad. Will a narrower light beam help solve the problem? (found some 12 degree online) I will go for the narrowest beam and highest candlepower possible.  Am I on the right track? Got any advice?  Thanks a bunch

Question by catman529   |  last reply


Would different angles on blades of propeller reduce Speed? Answered

The goal is to reduce speed of my Egg drop contraption but still spinning to keep it accurate.? Basicly its this. 8 blades on a octagon frame then String and then my shock absorbing egg carrier. What way would I want to set my Blades so that it doesn't speed through the air?

Question by noobiefied   |  last reply



Slicing a hockey puck into discs (vulcanized rubber)

I need to slice a hockey puck (1” thick by 3” diameter) into very thin discs (1/16” to 1/32” thick). This can be done... the NHL sells 1/4” puck coasters (see photo). Thinking about a mandolin design where the puck is mounted and the blade moves with my hand in a sled device. Puck rubber is very hard to slice. Thinking of Japanese angled blades (‘7’ shape rather than the American ‘V’ shape). Looked into ice auger blades (for blade thickness and stability). Just about de-gloved my hand with large box-cutter blades (bent as well when cutting the rubber). Any ideas? Raincock@ualberta.ca

Question by Marfeetus   |  last reply


How much angle or curve needed for bike trailer tow-bar?

I want to make a trailer for my bike, but am confused about all the various types/styles of D.I.Y. tow-bars I see being made/used...how does the curve/bend of the tow-bar affect whether the trailer will track correctly behind the bike? If the trailer does not track correctly behind the bike then the tires will be ruined over time, and it will cause more 'drag' (harder to pull). I understand that the tow-bar needs to be able to clear the bike's back tire when turning, but if I put the wrong angle or curve in the tow-bar will it cause issues with keeping the trailer straight behind the bike and tracking properly?So how does someone determine the correct angle/curve of the tow-bar, besides trial and error and possibly wasted materials? Thank you for your time and assistance.

Topic by Bsrlin   |  last reply


Bending 3/4" plywood into right angles with a 4" bend radius

I have an idea for a stylized plywood coffee table that is all made from a single board of 3/4" Baltic Birch plywood. I've attached a .jpg of a coffee table base-design to this email.  The bends on either side are 4 inch radius bends. Although I have basically no experience bending plywood, I sincerely doubt 3/4 inch plywood is going to bend into right angles at a 4 inch radius. I may be wrong, but if it is possible, I do not know how to do it, and certainly do not have the equipment. I've seen on the internet very flexible sheets of plywood, but wouldn't that just get glued into position and then just collapse once un-molded? I can't believe that I am the only person who wants to do something like this. Any input?

Topic by Dolmetscher007   |  last reply



reliable way to set and maintain the angle between my belt sander and the piece i'm working on

Effectively i need a angleable and lockable table with an adjustable stop to help me maintain the angle between the face of my belt sander and the peice (knife) i'm working on can anyone help?

Question by madenairy   |  last reply



How do I measure the angle of the hall in the hub motor of a electric bike.?

I bought a electric bike kit and is not working I connect all the cables on each color and nothing happen, the power don;t come out from the controller so I think is the controller defect so I ask for other controller to different store and they ask me to measure the angle of the wall, and if the angle is 120 there controller will work whit my kit, so please need help.

Question by Erick barreda   |  last reply


My angle grinder gets very hot. How do I fix it?

Hello there, I have a 2 years old Bosch GWS 8-115 angle grinder. It gets very hot quickly, a few seconds after powering it. If you wait a bit more even smoke comes out from the grinding wheel area. The rotor doesn't sound very consistent too. Any advice on how to fix it? Thanks, Shamir

Question by workingyooleking   |  last reply


Can you drill dowels on an angle into 2x4's to use as shoe rack?

I have a 30" wide wall area  in my closet. I've been searching for weeks to find the right racks/shelves to use as heels/shoe/cowgirl boot storage. I'd Like to nail finished wood (2x4's?) tho the whole wall after drilling/gluing different diameter/length dowels into them but not sure the (less than) 2" will be deep enough to hold some weight and how do determine which degree angles will work best. I'm an amateur but have every tool needed, so I'm game for all suggestions! Thanks

Question by DELETED_coco_baby   |  last reply


How can I get a filter whose color depends on the polarization angle?

Suppose you have a filter through which light linearly polarized at a 60` angle looks red, 120` looks green, and 180` looks blue. A mixture of 60` and 180` looks purple (red+blue). Unpolarized looks white (red+green+blue).Does someone make such a filter? Or one that only polarizes light in a narrow band of wavelengths and transmits other wavelengths unpolarized? Or can you think of a way to capture this information in a photo without specialized equipment or taking multiple pictures?

Question by NobodyInParticular   |  last reply


How to develop electronic differential for articulated rear drive e-trike using the steering angle in Matlab/Simulink?

One wheel at the front and two wheels at the rear,steering mechanism

Question by SachinK114   |  last reply


magnet motor or not ?

Is an angle grinder motor a permanent magnet motor or not ?,

Question by nicobotha12345   |  last reply


Does anyone know a proper build or adaptation for a wide-angle and/or fish-eye for a Panasonic DMC-TZ4

The camera already has a wide angle, i just want to give it a fish eye ability.hehe, fish eye ability, sounds like a super power.camera - http://www.google.com/products/catalog?q=tz4&oe;=utf-8&cid;=7499637240250354983&sa;=image#p

Question by ho_   |  last reply



How do I join 2 neoprene sheets in a sharp 90 degree angle?

I'm creating a neoprene casing to a small product and I'd like it to have a rather straight and stiff appearance, almost like a molded detail. For that reason I don't want to use normal seams (flatlock, overlock) to join the sides of the casing as it would cause bulgy surfaces or a too wide radius. How is this done in the industry? Could it be done either like alternative 1 or 2 in the picture? Which one is to prefer and which joining method is preferable (sewing, glueing, tapeing)? All ideas are welcome!

Question by karolina81   |  last reply


What's the best design for a water rocket?

There's two parts I'm wondering about: - fin design - recovery system design I'm planning to use angled fins. What angle is best? Does the shape of the fins matter, or can I just make triangles out of cardboard? For the recovery system, which is better: airspeed flap or "nose separates at apogee"? The second one is definitely easier to build, though.

Question by MePerson   |  last reply


Can a dremel cut through and shape an allen wrench, or should I use an angle grinder?

I've been wanting to get a dremel for a while now as I could use it for so many projects; however I don't know if it could handle a task like this.  Does anyone here know if it could, or should I just get the angle grinder.  I really don't want to get the grinder because I'm not too sure if i'd ever use it for anything else. I've attached an image of what I'm making for a reference.

Question by Spaceman Spiff   |  last reply


Anyone can tell me what's the smallest acutator/(stepper-)motor for angle of about ~45° ?

Was just a fixed idea and i'm not really into electronics yet, but i wondered, if it was possible to make bigger panels with tiny motors that move metal stripes/chips to form shifting shapes. Maybe just think of iron man's self-mounting armor or fish swarms for example, but in a smaller way, say as tiny as possible, but affordable (hehe).

Question by Luziviech   |  last reply


Knex double shot prototype

Here we have a slightly angled pin knex gun. The pin is slightly angled down, making the pin come in the magazine well angled, hitting two bullets instead of one. It uses an internal flexy bullet pusher instead of the external ones. It shoots two bullets 30 feet using two bands. It has a yellow rod magazine that isn't removable. It also uses a unique trigger system. Its comfortable, light weight and is very fun to use. No sights, its just a prototype.

Topic by DELETED_Blue Mullet 2   |  last reply


Could Any good drawers (drawing artists?) please help me a bit here?

Um....Could somebody with good drawing skills please help me real quick?I would like to use this drawing -or character- (Not mine), but I would like to have more angles of it. I personally don't think I can make good angles of it, so:Could anybody draw this from a few diffrent angles like front or back?ANY type of help would be greatly appreciated. Also, please forgive me if I put this in the wrong place, still not used to the new forum.

Topic by Keith-Kid   |  last reply


How would i make a lens for a projector so that when i shot i at a wall at an angle?

It is as wide up and down.  I dont know how ells to describe it.?

Question by Qsam   |  last reply


Electric knife sharpeners.....

Back in the day we already had these tiny grinding wheel like tools in the kitchen.Plug it in, press a button and slide the knife through.The blade was supposed to come out razor sharp if you trusted the ads....For obvious reasons a grinding wheel moving along the edge is not a good thing, especially not if both te up and the down movement work on the edge.As soon as they appeared they disappeared only to emerge years later in a "modern" form.The latest incarnation now comes with ceramic wheels to give an even sharper finnish LOLThe problem however is still the same, first the action of the whells then the fact that it is next to impossible to get different angles.They are really only good for some knifes you use in the shed if nothing else is available.A now much hyped electric sharpener is basically just a tiny belt sander with guides attached to it.And don't get me wrong, they come in handy for certain works.But if you ever used a belt sander on a flat piece of steel you realise that it is quite impossible to get a flat surface finnish.The belt curves around the edge and this results in a curved or beveled edge.Obviously the claim to sell these is that a beveled edge has superior strength and sharpness compared to a straight angled edge.And then there is the ability to adjust not just the sharpening angle but als the grid of the sandpaper.The finer you go, the better the result and sharpness...Now if we trust those who create swords from raw iron ore then something is wrong with the belt approch.These guys would tell you that you should always use a flat stone and to slice a piece of the stone.But also that a beveled edge is a sign of wear, something a good butcher will confirm.The angle of the edge party affects how sharp and durable the edge will be.Usually there is a compromise between blade thickness, meterial and edge angle.Just go from razor blade to an axe and include severel types of knifes between them.So a beveled edge in my opinion is only good for brute force tools but not that good for fine slicing and dicing.I tried to sharpen a wood chisel on one of the belt sander toys...It turned out to be far less precise and the edge was not fully straight.Could be down to lack of experience but if you ever try it let me know your results.The produced edge was also quite unusal and often bad when used as intendet.Far more chipping than cutting.Difference between straight angle and beveled angle when using a knife.You might want to do some lonely woodworks while fishing.A good knife now just eats into the wood and lets you cut and slice pieces of at almost any angle of the blade.With a beveled edge however you face the problem that your working angle is drastically reduced.Tilt the knife a bit too much and you suddenly just slide off the wood and into your flesh.If you grind and hone a knife to a 20° angle on a flat stone than from all angles above 20° you can cut.If you belt sand a knife to a 20° angle you end up with a bow over this angle.The actual usable working angle can be as low as 40° on a thicker blade.In theory it is possible to overcome this bevel problem.Sanders with a backing plate for example or by using just enough pressure to take material off.The first will destroy your belts quickly, the second takes forever.Some people just sand the knife at an angle to the belt, so instead of having the belt running at 90° to the edge it runs at 60 or 40°.Reduces the buckle but also the sharpness as the actual edge is now rounded.The only real way to sharpen a knife would be with a cutting or slicing motion, something that usually cuts your belts once the edge becomes sharp enough.So should you use them after all?As with all tools it comes down to quality and how you use the tool.If you know what you do and what the limitations are an electric sharpener can save you a lot of time.Someone with a desire for razor sharp knifes and tools might only use them on the lawn mower...You can however very well use sandpaper for sharpening a knife, which I will explain in another post....

Topic by Downunder35m 


Annoying Popups

Does becoming a premium member stop the annoying popups on this site?  The current trend of being BLASTED from every angle by ANNOYING advertisements is over the top.

Topic by christopher.kytle   |  last reply


Please help! knife sharpening jig for belt sander

I have a small belt sander that I use for sharpening knives but sharpening angle consistency is always a problem.  I've been trying to comue up with a jig to maintain a constant angle against the belt sander (see photo) Ideas?  I can't seem to figure out a viable solution to what should be a simple solution....right??!!!

Topic by adaniele   |  last reply


(SOLVED) Attaching Hardboard Together

Okay, so I want to make a box of hardboard. Problem is: how do I connect the pieces of hardboard together at right angles? I was planning to use a hammer and nails. I haven't worked with hardboard before. Please help! To clarify, my question is this: How do I connect pieces of hardboard at right angles to make a box? Thanks in advance, ~H4ZZ

Topic by __DELETED__   |  last reply


Reciprocating motion? Answered

Dear All I would like to imitate for to build a bar go up and down in angle 90 degrees  at website:   - http://www.alivola.it/00-CLOHE-EN-oscillating-lever-1.htm   ( oscillating lever 1 : animation ) So please help me to know  how  calculator  to find point C  ( CRANK 15mm) for the rod go up and down in angle 90 degrees .Many thank you                                                      Best regards                                                            lam

Question by lam   |  last reply


LED advice

I'm trying to source some LEDs, preferably from a supplier in the UK I'm going to mount them on a power kite, so they need to be bright as possible, ideally with a wide viewing angle and low forward voltage - to keep the weight of power supply down. Also, I'm considering options of mounting LEDs in clusters or using a small diffuser (like a ping pong ball, but smaller) to achieve a 360deg viewing angle. Any suggested products or ingenious solutions would be welcome

Question by davidhw 


baseball pitching machine auto feeder how to?

I made a very simple pitching machine...actually a soft toss machine. It is a pvc pipe assembly that when set up, dad simply "loads" a ball in the downward angled pipe and it "drops" in front of the batter. My question is: the downward angled pipe can be long enough to hold a dozen balls - what can I use to create a mechanism that allows one ball to drop every 5 seconds automatically?

Topic by nickhunterlandon   |  last reply