legs for keyboard

Hello all, i just purchasec a new logitech illuminated keyboard, which has the shortest "legs" i've ever seen. i loved the steampunk-keyboard idea, but, until i can afford one, does anyone have an idrea on how to raise the back of the keyboard (not books or batteries - i've tried them...) ? thank you.

Topic by myming   |  last reply

how to make legs? Answered

Hey guys i need human like legs for my robot sugjestense i looked at wowwee robots ideas any one

Question by tinker234   |  last reply

robotics : legs and wheels

Hi !Generally, wheeled robots sound limited, and legged robots too much complicated.So, wheels or legs ? Well, seems it's possible to take the best of the two worlds : Look at this robot !http://www.dailymotion.com/cluster/tech/featured/video/x3g2y3_rhex

Topic by chooseausername   |  last reply

hey I am trying to make a projector cart that has folding legs.

This is what I need http://common.csnstores.com/common/categories/large/18732.jpg. But i would like for the sections to fold in so that it could be transported in a car vary easy. Any suggestions for the legs would be help full.?

Question by equinox55   |  last reply

RGB-LED with 6 legs? Answered

As far as I know, RGB-LEDs have 4 legs: 1 common cathode and 3 seperate anodes (or vice versa). Santa Claus has left me a RGB LED with 6 pins. Now I'm confused and he has left the country! Can anyone help and explain this to me?

Question by bertus52x11   |  last reply

LED wiring - Does it matter? Answered

I've got some LEDs that I'm going to be wiring in parallel with separate resistors. Does it matter which leg of the LED the resistor is on? Is there a standard practice? I'm going to be soldering all of the legs on one side together so that I only need to have one 'ground', does it matter which leg? Thanks.

Question by jonrb   |  last reply

code for servo based robot using atmega8 with turnigty tgy-S3101S servo motor.?

I'm making servo based robot using atmega8 but your code given for servo motor TS -53, but i have turnigty tgy-S3101S servo motor and don't specification of this motor like FRONT_CENTER, REAR CENTER AND SLEW SCALE values for coding. pls reply as soon as possible......

Question by vis_genius   |  last reply

Would it be possible to make a walking 8 legged... thing?

I'd like to make a walking spider, about 30 cm tall, preferably out of metal. It wouldn't even have to go in a perfectly straight line. Ideas?

Question by Kryptonite   |  last reply

how to build a four legged robo for climbing a ladder??

I want to build a 4 legged manually controlled robot for a college competition which can climb a ladder which is placed at an angle of 90 degrees from the ground.and the robot must be of size 400mm X 400mm X 350mm .... please help me......

Question by pravy   |  last reply

can anyone help in the creation of a robot prosthetic leg?

My crew coach got into a horrible motorcycle accident and he had to be amputated above the knee. i had an idea using accelerometers and electronic gyroscopes to make the leg balance itself but i have no idea how to script or program. i also need to figure out how to make the leg move when it needs to and stop when it needs to. i have not started this project yet, but who knows i might be done by the time someone reads this.

Question by katman101   |  last reply

LED / Resistor Question - This should be easy for you to answer. Answered

I noticed that on LED wiring diagrams the resistor is on the incoming current leg.  Is there any reason why the resistor could not be on the out going current leg? If a resistor was installed on the out going leg then multiple LED could be tied in through one resistor rather than having an individual resistor for each LED.

Question by baudeagle   |  last reply

Triac Answered

In the circuit shown are we actually only switching one side of the 220 Vac? From L to L is only one leg of the 220?

Question by WWC   |  last reply

What can I use to shield cellphone radio waves/ frequencies? Answered

I always put my cellphone in my right pocket, only the right pocket, keys and wallet go on the left. I noticed awhile back that my leg sometimes twitches. So now I was wondering if I can line my pocket with something that will shield the radio waves from my leg. What would work?

Question by Koosie   |  last reply

what is this electronical component i have found?

I've found a blue thing in an old electric piano it has two legs written on it 10nJ+   -100V

Question by top.boy   |  last reply

Pelt curing: how to preserve the ears and feet of a hare or rabbit? Answered

Yesterday got a hare from roadkill. (It is stewing right now). I want to try to do an attempt at taxidermy. I got the pelt off intact, except the lower part of the legs, and I still have to do the head. I was thinking of just letting the legs dry: Quite tedious to take the skin off, and hardly any meat on it. Can I do this, and can I just let the ears dry?

Question by BobS   |  last reply

What is the best placement for a go-kart engine?

We CANNOT put the engine behind the seat, only under the seat or between the driver's legs. Please help.

Question by DarkVolt   |  last reply

Why do my feet sometimes smell like malt vinegar? Answered

It's not every day or with all shoes, or only after eating cod at the pub...

Question by    |  last reply

Controlling a DC motor (12v) using a SN754410 Motor Driver Ic and 2 snap-action switches?

I am using a Arduino Uno with a SN754410 ic to control my 12v motor (exactly like diagram from http://itp.nyu.edu/physcomp/Labs/DCMotorControl) Managed to use a SPDT switch to change direction (sheer miracle for me) I plan to put 1 snap-action switch in front of my bot and 1 at the back, so it will travel forward until it hits an obstacle, then reverse all the way until it hits another obstacle. Once the motor is activated, it will go maybe go for 5 minutes, then pause for 10mins, then on for 5 mins again, and so forth. First attempt with the arduino so any help with detailed instructions about how to go about wiring these two extra switches and the programming code would be greatly appreciated! Also, I need it to be mobile so I'm thinking of connecting a 12v2.2AH/20HR sealed rechargeable battery to the motor itself, and another 9v for the board cos I read it regulates it to 5v. Will this be ok? Will it be able to last my bot for a few hours? My current code: int switchPin = 2;    // switch input int motor1Pin = 3;    // H-bridge leg 1 (pin 2, 1A) int motor2Pin = 4;    // H-bridge leg 2 (pin 7, 2A) int enablePin = 9;    // H-bridge enable pin     void setup() {     // set the switch as an input:     pinMode(switchPin, INPUT);     // set all the other pins you're using as outputs:     pinMode(motor1Pin, OUTPUT);     pinMode(motor2Pin, OUTPUT);     pinMode(enablePin, OUTPUT);     // set enablePin high so that motor can turn on:     digitalWrite(enablePin, HIGH);   }     void loop() {     // if the switch is high, motor will turn on one direction:     if (digitalRead(switchPin) == HIGH) {       digitalWrite(motor1Pin, LOW);   // set leg 1 of the H-bridge low       digitalWrite(motor2Pin, HIGH);  // set leg 2 of the H-bridge high     }     // if the switch is low, motor will turn in the other direction:     else {       digitalWrite(motor1Pin, HIGH);  // set leg 1 of the H-bridge high       digitalWrite(motor2Pin, LOW);   // set leg 2 of the H-bridge low     }   }

Question by email.jodi.now   |  last reply

Your valuable information on robotics?

       sir,                        My name is krishna chaitanya ,i am studing B.TECH -3 YEAR                                                      I have intresting to build a two leg robot, so please give me your valuable ideas                 

Question by krishna chaitanya   |  last reply

Need Animatronic / Robotic Costume Help

Hello all. I'm working on a project that I hope someone here can help me with. It's very complex and going to take a few years for me to complete. The project is an animatronic / robotic (either or both) centaur costume. The idea is to make it a one-person costume where the back walks with me as I move. It will also have certain preset-up movements linked to trigger points on the body. Such as, were someone to touch the rear-end, the tail will flick at them. I also want to be able to lie the body down on the floor while I'm in costume so I don't kill my legs standing all day. I'm playing with either having individual motors at each of the joints in the hind legs or using a cable, pully and gear system attached to the front legs (my legs) to drive them. I already have some drawings of my ideas that I've been working on but, since I've never done something quite this complex before, I'm hitting a bit of a road block. To be more specific, I have no idea what size actuators, servos or motors I'm going to need to make this thing move as naturally as possible. The frame will be aluminum and the hooves will be pine with some light stuffing and fake fur over it. I have no idea how heavy it will be. I will add the drawings as soon as I have them finished. Any help would be greatly appreciated.

Topic by Graceria   |  last reply

I need help on how to connect the components together on an ic board

I need to know how to solder the leads of one components to the legs of another one(the Perf Board doesn't have pre-connected copper tracks)

Topic by wesie42   |  last reply

Where do you buy you're servo motors?

I'm looking to run a few servo motors with my arduino to make an arm and eventually a a 4 legged base.

Question by the_doctor   |  last reply

What is the power consumption of an LED with bi color t1? Answered

Dear Gang, I have a bi-color t1 red/green LED that has 3 legs in it, I was wondering what is the voltage requirement and wattage that it can work with.Does anyone knows the answer? Thanks

Question by mitchiko   |  last reply

Where can I buy the CDT3460-02 IC?

I need it for my TeaLeds. It's an IC chip with 3 legs (like a transistor), and it's function is to give a flicker light effect to a LED (to simulate a candle) and don't need programing.

Question by becava   |  last reply

Does anyone know the best way to unlock my HTC Legend in Canada?

I'm looking for a cheap, efficient solution. If anyone knows any really good unlocking service websites, let me know as well.

Question by ANDY!   |  last reply

Is there a way to calculate how much weight a servo can lift? Answered

I'm working on a 6 legged, 3DOF, spider-like robot, and I was wondering if its possible to find out how much weight the servos I have can lift... It says they are rated 3.9kg - cm so for 1 cm pole, its 3.9kg, and how can I convert that to see how much weight it can hold? the servo's that move the legs I'm not worried about but the ones that lift the chassis, make me have second thoughts.. The chassis is less than 1 pound, so at the point of the servo is about an inch and a half away, will it be able to lift.. Also, 6 servos will be lifting, so does this add all the torque together for a total product?

Question by Mudbud   |  last reply

Throwie concept

Would it be a good idea to solder one led leg to a battery, and the other to a magnet, the put a tab between the two? Has this been tried before? I want to make a few as "flares" for airsoft. Thank you for your help.

Topic by Trace II   |  last reply


Hey all! I am a paraplegic and have no use of my legs, I am also an artist and would very much love to be able to tattoo. Is there a way that I could use a tattoo gun without the use of the foot pedal or my foot? 

Question by thebabers131   |  last reply

What design features could be considered to make the laptop sit better on your legs, or that increases airflow when on a desk?

Asus, a sponsor of Instructables, has put together WePC where they are asking for input on their next generation laptops. As part of their sponsorship, they've asked my opinion on various aspects of laptops. Most recently What design features could be considered to make the laptop sit better on your legs (curved bottom), or that increases airflow when on a desk? In the next couple of weeks, I will be asking for your input on the final set of features for their community designed netbook. This is pretty exciting because feedback from users on Instructables will be directly incorporated in a consumer product that is scheduled to hit the shelves at the end of this year. For now, laptop stands:Instructables is full of laptop stands, and so I thought that the best way to answer this question would be to check out what lead users are already doing.A PVC laptop stand is one of the basic types, and it only requires cutting the PVC. The parts are held together with friction, and easily disassembled if necessary.PVC Laptop Standhttps://www.instructables.com/id/PVC-Laptop-Stand/An even more minimalist laptop stand can be fashioned from a metal coat hanger. Perhaps the Netbook should have flip-out legs to let users do this without an additional accessory?Ergonomic Laptop Stand Made From a Coat Hangerhttps://www.instructables.com/id/Ergonomic_Laptop_Stand_Made_From_a_Coat_Hanger/If you want to use your laptop in bed, the stand's legs needs to straddle you, like this laptop stand for bed.A better laptop stand for bedhttps://www.instructables.com/id/A-better-laptop-stand-for-bed/Since a laptop is essentially a monitor with a computer attached to it, an adjustable monitor arm can act as a laptop stand.Adjustable Vesa Arm Laptop Standhttps://www.instructables.com/id/Adjustable_Vesa_Arm_Laptop_Stand/Construction materials aren't only for insulating houses!Insulating Laptop Padhttps://www.instructables.com/id/Insulating-Laptop-Pad/Need to use your laptop outside? Try a tripod.Laptop Desk From Old Camera Tripodhttps://www.instructables.com/id/LAPTOP_DESK_FROM_OLD_CAMERA_TRIPOD/With the exception of the stands that are simple shelves, all of these stands have some sort of positive attachment point to the laptop in common. Like cameras, laptops should get a standardized bolt pattern allowing users to easily mount them in a variety of different ways. For more laptop stand ideas, see our Laptop Stands Guidehttps://www.instructables.com/id/Laptop_Stands/

Topic by ewilhelm   |  last reply

theo jansen

Does anybody know the exact dimensions of theo jansen kinetic sculpture's legs? On a video theo jansen said that 11 different dimensions would work, but 1 was the best. Does anybody know the dimensions? I'm going to build a solar version just to impress people in this solar contest.

Topic by guyfrom7up   |  last reply

LED Mouse Mod?

Ive been trying to do a mouse mod where an LED lights up everytime I click. Can someone please post an instructable? or else i will when i get it figured out. what i figured was that i would have an led with a resister hooked up to the 5v part of the circuit board on one of the legs.. then i would have the other leg soldered to a wire and to make the LED light up, the circuit would have to be completed by clicking the mouse down. But the problem is i cant do that without messin up the clicking function. when i tested it the mouse click would be stuck. So i will post an instructable when i figure this out if noone else does. please leave a comment if you figure something out.

Question by squirrelMLM   |  last reply

Connecting a USB?

How would you connect the wires from a USB (female) with wires that are red, black, green, and white, to a 5V boost regulator that only had three legs - Vin, Ground, Vout?  It's not for a computer so I don't think we need the green and white wires, but I could be wrong.  Which wire goes where?  Thanks!

Question by mckywer   |  last reply

Does anyone know of a tutorial for using a single RGB LED with an Arduino Duemilanove?

 I want to run a 4 legged RGB LED off of my Arduino, and do color mixing, but I cannot find a tutorial for this small project. All I really need is the sketch and maybe a schematic.

Question by jbyrns1993   |  last reply

I need to buy or fabricate a strong crankshaft for a strandbeest-like glass robot.

I'm making a walking robot out of glass based on Theo Jansen's strandbeest leg design. Fabricating the crankshaft has proven an odious challenge. I'm looking for a source where I can buy either a complete crankshaft to my specs or parts from which to fabricate my own. It needs to be about 30" long, with 6 crank arms (offset 120°, therefore 2 at each angle), throw on the crank to be 1". My original design was for a 1/2" diameter shaft, which is necessary if it's going to be glass, but if metal the shaft diameter could probably be smaller. The video here shows the crankshaft I made, but I don't  really trust it.http://instagram.com/p/x8xcPeyn-1/?modal=true  The prototype leg:  http://instagram.com/p/wewqr1yn6a/?modal=true

Question by bandhudunham   |  last reply

Problem with 8x8x8 led cube ?

I made a 8x8x8 led cube , i had finished all soldering  all leds works properly   but now i have a problem some of the glows(lightly) when ground is given to the +ve leg of the leds  or when 2 when +ve and -ve is given to -ve  of different layers Is this problem negligible ?? will the cube works ?? 

Question by Mayoogh_Girish   |  last reply

advice on what these are

I have 6 of the silver ones and 1 of the gold but i cant work out what they are anyone have any advice as google is not helping gold  -  Ancom 741 silver -  rc 743 d ray 7231 also i have found little black ones with 4 legs on each side with 7244  sn72741p thanks for any advice you can offer 

Topic by aafit   |  last reply

Mouse wheel. How do I replace optical encoder with rotary encoder?

Hi, I have a Belkin Nostromo N52 controller. It has a mousewheel that can be custom programmed independently from the wheel in your regular mouse. I want to use it as a jog dial so I want to remove it from the original place and replace the rubber wheel with a jog dial. Basically it is to rotate the wheel 90 degrees as they did here with a mouse: https://www.instructables.com/id/Desktop-Scroll-Wheel-and-Volume-Control/?ALLSTEPS The problem is the Nostromo wheel uses an optical encoder instead of a rotary encoder (the typical used by half of the mouse wheels in the world). The mod I want to do would be a little complicated using the optical encoder (I would have to use a piece of PCB perpendiculary soldered to the main PCB and the height of the resulting device would be very tall for what I want) but it would be very easy if I could replace the optical encoder with a rotary encoder I salvaged from a mouse since it can be laid down on the PCB pretty well. The problem is the signals of the optical encoder and the signals of the rotary encoder are different. The middle leg of the receiver in the optical encoder is connected to +5vcc while the outputs are connected to ground using 10KΩ resistors. In the rotary encoder, the first leg is connected to ground and the other two go directly to the mouse IC. I tried to remove the optical encoder of the Nostromo and connect the two outputs of the rotary encoder to where the outputs of the IR detector go and the third leg to ground but all I get is a permanently actived scroll down (as if the wheel was scrolling down all the time). I didn't dare to connect the third leg to Vcc just in case I blow the thing. I think there must be a way to replace the optical encoder with a rotary encoder and get the same signals and I think this involves using the Vcc line and resistors but since I'm not very good at the electronic side of things, I don't know how to do it. I'm enclosing a diagram of the optical encoder circuit. The diagram on the right enclosed in question marks is what I guess would be the equivalent circuit for the rotary encoder but I'm not sure. Can anybody confirm it or point out the appropriate corrections? Thank you.

Topic by jedikalimero   |  last reply

is there a possible way to repair this external battery? Answered

Its apacer B120 li-ion 6600mah @3.7v    (3x18650) a friend of mine test one of those 3 leg diodes  (not the burned ones) he said it gives strange number cant find you a replacement :( i dont know how to measure just solder so if anyone can provide any help its welcome non of the usb works

Question by turbiny   |  last reply

pinout help for my salvaged ir sensor/photo diode from mouse.?

I have salvaged ir emitter sensor pair from an old optical mouse. ir led glows fine on testing with mutimeter but the sensor part has 3 legs and i have always worked with 2 leged photodiodes . what is this specifically called? how can i know its pinout by testing with multimeter?

Question by Atul009   |  last reply

which generator circuit is better/costs less to charge an SLA?? Answered

Which generator circuit is better/costs less to charge an SLA?? please see the three circuits below and vote but if you think you can improve one of them please email me , I will post it and do the leg work.  I am about to retire and my purpose is to at least not pay for the reading lights.. cherrs Thanks for your input Al

Question by celalboz   |  last reply

RGB LED strip quiestion :)

Hi everybody, I saw a tutorial on how to make led light-bulb , https://www.instructables.com/id/21-W-Led-Bulb-1450-Lumens/ , this one. I have a led strip which i can use, the only problem , the strip is RGB , and i want it to give of white light. i don't have a controller for them, and i don't really want to use one. So my question is : can i wire them in some way to give of white light ? Thanks.

Topic by maniak.loop   |  last reply

making a Club

My father and I make model trains. In one of our buildings i want to make it like a club, with colour changing lights(hoping to use a 2 leg RGB. Im still new to designing circuits and wondering if there is some-one out there who could help me make a circuit that would allow me to control the speed in which the LED will change colours and also have a on/off switch. If there anyone out there who can help me feel free to e-mail me on here or at parker66@nzmail.net. Cheers Daniel

Topic by parker6611   |  last reply

How to connect LED to switch?

Well i bought a 7 color 5mm led.It blinks many colors for 30 seconds till it goes to sleep(turns off) i need help with this.The middle on is + the other one is - and the other leg is to controll the led.I recently found out that i can use a switch to control the led but how? i need help finding the right switch and how to connect this led to the switch.plz any help will be thankfull. Dont bother looking for info on the net for this LED cuz i searched the entire web for information about switches for this LED and nothing.

Question by zerosk8ter83   |  last reply

I have an old jigsaw motor, anyone know of anything not to complicated to use it for?

Recently got a jigsaw motor from a jigsaw where the blades wouldn't stay in, I feel no need to fix it as it has had some hard use and is on its last legs. I was just wondering if anyone had any handy or cool uses for it, even if they're useless uses. Edit: It also has variable speed although at this point in time im not sure what the range is, I post this just incase it makes it any more useful.

Question by ads100   |  last reply

Would this LED idea work?

Hello, I was thinking about this concept all day today, in which two potentiometers could vary the voltages to 2 of the 3 legs on a biocolored LED, thus being able to produce many different colors. I figure that I could hook up 3 volts, then (in parallel) hook up the two potentiometers to two of the leeds off the LED, the third being the ground. I'm not exactly an electronics guru, (and I hope that I had my vocabulary right in my explanation), but would this work? Also, where can I get some bicolor LED and potentiometers with knobs?

Topic by Jackhole   |  last reply

Ultrasonic distance measure

Hi eveyone, I'm an assistant cameraman in film and tv and sometimes I've hired in a  professional distance measure device to help with really tricky shots. Trouble is, to buy one costs an arm and a leg, I was just wondering if anyone here had come up with an affordable version. The device sits on top of the camera and sends out ultrasonic pulses to where ever it's pointing and displays the distance in feet and inches on a LED display, that constantly updates. That's all it needs to do. Should have a range of 2' to 15' and be +/- 1" accuracy. Any help would be greatly appreciated.

Topic by Fat Sparrow   |  last reply

RGB Led doesn't mix colors

Hey all I am working with common anode RGB LED. I hooked each leg (red, green, blue) to pins 2-4 of my Arduino UNO. I then hooked the anode to 5v via a 22 ohm resistor. The code I wrote was very simple; turn pins 2 through 4 low, delay 500, turn pins 2-4 high. The problem I found was that instead of the color turning white it stayed red. I tried mixing red with green and red with blue, each time same thing it stayed red. Does this sound right?

Topic by Mpc1055   |  last reply

Wiring stripboard tracks to common ground

I'm planning a stripboard POV kit to solder with learners over about 3 hours or so, and I have a problem designing the wiring for the LEDs. It's straightforward to use the required series resistors to wire the output pins of an ATMEGA like http://www.arduino.cc/en/Hacking/PinMapping to the anodes of 8 5mmx2mm rectangular leds like http://www.rapidonline.com/Electronic-Components/Kingbright-L-383IDT-5x2-5mm-H-i-Red-LED-Rectangular-56-0398 packed side by side onto 0.1 inch stripboard. However, I'm facing a puzzle when trying to wire the LEDs' cathodes together to ground. It's fairly easy for me myself to do this, just by free-soldering a couple of spare legs directly over the cathode tracks, or chaining loads of wires. However, I can't see myself guiding 45 people through this in a workshop without hassle and errors. Does anyone have a simple way to wire 8 'odd' stripboard tracks together to a ground track (the 'even' tracks have the anodes in them). To give a flavour of the solutions I'm considering, I'm looking into 0Ohm bussed resistor networks like http://www.interfacebus.com/resistor-network-schematic-bused-resistors-sip.html to wire theparallel tracks into a single ground track using a standard through-hole component with legs clipped off. However I'm having trouble sourcing anything like this, and I'm sure others have better ideas.

Topic by cefn