Follow the bouncing ball!

An article in PhysicsWorld reports on a novel technique for measuring the acceleration due to gravity. The researches used a cloud of ultra-cold atoms and bounced them off a series of upward laser pulses. By measuring the timing of the bounces they could measure g with better than 1 per mil precision.

Topic by kelseymh 10 years ago  |  last reply 10 years ago


Knex ball machine: Bounce

Dysprosium is almost finished and will be posted within 2 weeks. I am currently planning another ball machine named Bounce. It will be around 3 feet tall with 2 paths. The lift system going to be a chain lift. The first path will go onto a trampoline, bounce onto another, and another, than land in a basket. I don't know what the second path will be so please leave a comment with ideas. There aren't any pictures yet.

Topic by coolknexcreations 9 years ago  |  last reply 9 years ago


Repair handle on bounce horse

I am needing to repair the handle of this children's bouncing horse.  I don't know if the handle is original but it is the one that came with it.  I need advice on how to attach the handle.  

Topic by carolb4 3 years ago  |  last reply 3 years ago


Bouncing eggs!! What do you think?

Did you know that if you leave an egg in vinegar for a few days the vinegar will dissolve the shell of the egg and the egg can bounce!! Post your views on bouncing eggs!  Refer the video to see how to make it! http://www.youtube.com/watch?v=GrVuag3YCtQ  

Topic by sidgupta 6 years ago  |  last reply 6 years ago


Debounce arduino push button sketch

Hi, I have done the following sketch and wiring, i have tried all sorts of Debounce code in the sketch but can't get it to stop. Most of the sketches i have read and tried switch the led on with one push and off with the second. i just want it to stay on while being pushed and go off while not being pushed, i am working towards RF or Bluetooth but not until i stop this bounce!

Topic by Senken 4 years ago  |  last reply 4 years ago


Science Fair idea: Bouncing Liquids

Here's an idea for the science fair: Bouncing liquids. Explain how it works and do something cool with it!http://www.nature.com/news/2007/070716/full/070716-17.htmlLiquids bounce againJumping jets move from the bathroom to the kitchen.After bouncing shampoo, physicists now bring you bouncing cooking oil. A team in Texas has found that the trampolining of a liquid jet falling onto a bath of the same liquid is more common than expected.Last year, a group in the Netherlands studied this bouncing effect for a jet of shampoo (see 'Puzzle of leaping liquid solved'). The bounce, which was first reported more than 40 years ago, happens because of the peculiar nature of shampoo, which gets thinner (less viscous) as it flows. A jet of it hitting a liquid surface is therefore lubricated by a thin layer at the interface, enabling it to bounce off rather than merge.But the liquids now studied by Matthew Thrasher and his colleagues at the University of Texas in Austin don't have this property. The silicone oils in their experiment are viscous but have 'normal' flow behaviour, like water.The researchers directed a jet of oil vertically onto the surface of a tank of the same oil. They found that the jet could undergo both a 'leaping' rebound and a bizarre 'flat' bounce in which it sprang horizontally across the liquid surface.The bounce here is due to a thin layer of air that separates the two liquid surfaces, the researchers say in an article submitted to Physical Review E.They point out that the effect can easily be recreated in a kitchen experiment with cooking oil. Just fill a glass pie dish with about 4 centimetres of oil and pour onto it a thin stream from a cup about 3 to 6 centimetres above the surface. While pouring, move the stream in a circle about once every 2 seconds (or perhaps less messily rotate the dish on a Lazy Susan). The bounce can be encouraged by passing a chopstick or some other small rod through the stream every now and then.

Topic by ewilhelm 11 years ago


BOUNCE: original game (download here)

BOUNCEBOUNCEBOUNCE [download] BOUNCE is an original 2D platform style game built in Java. The game incorporates game elements like destructible terrain, 3rd person shooting, and puzzles, to provide an experience similar to such games as Mario and Minecraft. You, a lone circle in a world of squares, must make your way through 50 levels to save the galaxy from destruction. Along the way, you'll face laser shooting robots, parkour puzzles, and fire-breathing dragons. More information available at http://www.java-gaming.org/topics/iconified/27023/view.html.

Topic by supercapacitor 4 years ago  |  last reply 4 years ago


Knex Bouncing Betty: Anyone Interested?

How do you feel about using tactical items like mines?  I'm just looking for an opinion from people, since recently I made one for fun. It resembles a 'Bouncing Betty' and it works by tripping a switch. By the way it's built, it's usable outside and inside. Tell me what you think of it, and I will post it up soon. Update 4/28/11: Posted Photo Instructable. Please see the first model and subscribe for future variations.

Topic by username252 8 years ago  |  last reply 8 years ago


how do i get a hold of noahw his email keeps bouncing back? ?

Question by jrutkowski67 7 years ago  |  last reply 7 years ago


Bouncing PC! How to secure PCI/PCIe cards and keep cables in place?

I have a desktop PC with a lot of components including a large number of PCI/PCIe cards. The problem I have is that the machine is regularly transported long distances by a variety of means, including rail, road and sea. What happens is that the (often quite generous) jars and jolts of the journey cause cables to fall out and cards to rise out of their slots at the unsecured end. Each time I have to open everything up and reseat everything. If the machine arrives somewhere where I'm not, it can't be used until I arrive. I've gotten around the problem of SATA cables falling out by purchasing cables that clip into place rather than just flap about in the usual fashion. What I don't know how to do is secure ribbon cables, audio cables, cards and the like.  Because of various constraints: - I can't use plastic zip ties (there's nowhere to secure them) - I can't use brackets (the cards are half height) - I can't swap out or modify the chassis The only option appears to be glue. Old fashioned sticky stuff. Thing is, I've read an awful lot of things on the web and while this question gets asked a fair amount there is no consensus. Some people say to use a conducting type (which seems plain idiotic, given that if applied to a PCI interface it'll short out), and others say to use a glue gun (which might introduce problems with regard to the heat and chemicals). The only suggestion that made sense was a silicon sealant from Loctite designed specifically for circuit boards - Tempflex - but there's almost no information about it and the word 'Temp' makes me concerned it's just a makeshift solution (no pun intended). It's also really too expensive to buy a tube and only then discover it won't work. Does anyone have any thoughts?

Topic by 10,000 Angry Vegans 9 years ago  |  last reply 9 years ago


How can I decrease the bounce rate on my blog?

Recently I created a free online magazine called Meta Haven Magazine http://metahavenmagazine.comand my intention is to create a community of viewers/readers in which everyone is actively contributing additional magazine content, items, reviews, etc. which is undoubtedly being missed by myself but most importantly being missed by the audience. In return as an incentive if the submitted material is voted upon by the community as being good enough to add to the magazine then in return that person will get the chance to have a free post to promote themselves, their blog or whatever of their choosing. I've noticed since I've launched the contest bounce rates have gone up. Would you change the value of the contest or the contest itself? Thanks – Meta Haven Magazine.

Question by 10 years ago  |  last reply 10 years ago


I want to model rays of light bouncing off a parabolic dish with technical drawing, How do I do it?

Basically I want to model the sunlight as it bounces from both a parabolic and a compound parabolic dish. I want just to use technical drawing. It is no problem to model if the dish is pointed straight at the sun but I want to model the rays if the dish is NOT pointed at the sun. On a curve, I will gestimate a tangent to an arc and light bouncing off goes off it at the same angle as it hits it. NO problem it the light arrives parallel to the plane of the dish but most of it will not arrive like this. How do I do it? Just with elevation plan and sideviews and sections through the dish.Thanks Brian It is in relation tohttps://www.instructables.com/id/Compound_parabolic_dish_making_a_template_with_te/

Topic by gaiatechnician 10 years ago  |  last reply 9 years ago


Powerisers/Jumping Stilts

Powerisers or Jumping Stilts.....They are a specially designed pair of shoes that you wear that have spring-kind-of-things on them. You can jump six feet high with them and run up to 20 mph! Pretty amazing! But my question is if anybody would know how to build them, or where to get them cheap, or what are the spring parts made of? Because the springs have to be under enormous pressure to withstand the bouncing. So if you know any material that would to the same trick please let me know.Here is a link: here

Topic by TeacherOfTheWays 11 years ago  |  last reply 3 years ago


Analog and Digital Inputs for Teensy 3.2 MIDI Programming within Arduino

Been having some trouble with programming my custom potentiometers for my midi controller. I have 12 buttons and 6 knobs. I have it wired correctly and have the sanwa arcade buttons working fine. I'm just having a huge problem adding analog code to my digital code. I'm not sure where to go from here, I have tried over 20 different types of analog code and I'm not sure what I'm doing wrong. Just need a basic potentiometer for reading MIDI. I have the first 1-12 digital inputs on my teensy soldered in for my arcade buttons. For the analog potentiometers I have them soldered on inputs 18-23 or (A4 thru A9) on the Teensy 3.2. I am using Arduino software along with the Teensy loader. Any help would be greatly appreciated, thank you. Here is the code I have thus far. I only have the 19 and 23 analog inputs written in this one at the very end, because I removed the others.  ******** /* Buttons to USB MIDI Example    You must select MIDI from the "Tools > USB Type" menu    To view the raw MIDI data on Linux: aseqdump -p "Teensy MIDI"    This example code is in the public domain. */ #include // the MIDI channel number to send messages const int channel = 1; // Create Bounce objects for each button.  The Bounce object // automatically deals with contact chatter or "bounce", and // it makes detecting changes very simple. Bounce button1 = Bounce(1, 5);  // 5 = 5 ms debounce time Bounce button2 = Bounce(2, 5);  // which is appropriate for good Bounce button3 = Bounce(3, 5);  // quality mechanical pushbuttons Bounce button4 = Bounce(4, 5); Bounce button5 = Bounce(5, 5);  // if a button is too "sensitive" Bounce button6 = Bounce(6, 5);  // to rapid touch, you can Bounce button7 = Bounce(7, 5);  // increase this time. Bounce button8 = Bounce(8, 5); Bounce button9 = Bounce(9, 5); Bounce button10 = Bounce(10, 5); Bounce button11 = Bounce(11, 5); Bounce button12 = Bounce(12, 5); void setup() {   // Configure the pins for input mode with pullup resistors.   // The pushbuttons connect from each pin to ground.  When   // the button is pressed, the pin reads LOW because the button   // shorts it to ground.  When released, the pin reads HIGH   // because the pullup resistor connects to +5 volts inside   // the chip.  LOW for "on", and HIGH for "off" may seem   // backwards, but using the on-chip pullup resistors is very   // convenient.  The scheme is called "active low", and it's   // very commonly used in electronics... so much that the chip   // has built-in pullup resistors!   pinMode(1, INPUT_PULLUP);   pinMode(2, INPUT_PULLUP);   pinMode(3, INPUT_PULLUP);   pinMode(4, INPUT_PULLUP);   pinMode(5, INPUT_PULLUP);   pinMode(6, INPUT_PULLUP);  // Teensy++ 2.0 LED, may need 1k resistor pullup   pinMode(7, INPUT_PULLUP);   pinMode(8, INPUT_PULLUP);   pinMode(9, INPUT_PULLUP);   pinMode(10, INPUT_PULLUP);   pinMode(11, INPUT_PULLUP);   pinMode(12, INPUT_PULLUP);// Teensy 2.0 LED, may need 1k resistor pullup } void loop() {   // Update all the buttons.  There should not be any long   // delays in loop(), so this runs repetitively at a rate   // faster than the buttons could be pressed and released.   button1.update();   button2.update();   button3.update();   button4.update();   button5.update();   button6.update();   button7.update();   button8.update();   button9.update();   button10.update();   button11.update();   button12.update();   // Check each button for "falling" edge.   // Send a MIDI Note On message when each button presses   // Update the Joystick buttons only upon changes.   // falling = high (not pressed - voltage from pullup resistor)   //           to low (pressed - button connects pin to ground)   if (button1.fallingEdge()) {     usbMIDI.sendNoteOn(61, 99, channel);  // 61 = C#4   }   if (button2.fallingEdge()) {     usbMIDI.sendNoteOn(62, 99, channel);  // 62 = D4   }   if (button3.fallingEdge()) {     usbMIDI.sendNoteOn(63, 99, channel);  // 63 = D#4   }   if (button4.fallingEdge()) {     usbMIDI.sendNoteOn(64, 99, channel);  // 64 = E4   }   if (button5.fallingEdge()) {     usbMIDI.sendNoteOn(65, 99, channel);  // 65 = F4   }   if (button6.fallingEdge()) {     usbMIDI.sendNoteOn(66, 99, channel);  // 66 = F#4   }   if (button7.fallingEdge()) {     usbMIDI.sendNoteOn(67, 99, channel);  // 67 = G4   }   if (button8.fallingEdge()) {     usbMIDI.sendNoteOn(68, 99, channel);  // 68 = G#4   }   if (button9.fallingEdge()) {     usbMIDI.sendNoteOn(69, 99, channel);  // 69 = A5   }   if (button10.fallingEdge()) {     usbMIDI.sendNoteOn(70, 99, channel);  // 70 = A#5   }   if (button11.fallingEdge()) {     usbMIDI.sendNoteOn(71, 99, channel);  // 71 = B5   }   if (button12.fallingEdge()) {     usbMIDI.sendNoteOn(72, 99, channel);  // 72 = C4   // Check each button for "rising" edge   // Send a MIDI Note Off message when each button releases   // For many types of projects, you only care when the button   // is pressed and the release isn't needed.   // rising = low (pressed - button connects pin to ground)   //          to high (not pressed - voltage from pullup resistor)    }   if (button1.risingEdge()) {     usbMIDI.sendNoteOff(61, 0, channel);  // 61 = C#4   }   if (button2.risingEdge()) {     usbMIDI.sendNoteOff(62, 0, channel);  // 62 = D4   }   if (button3.risingEdge()) {     usbMIDI.sendNoteOff(63, 0, channel);  // 63 = D#4   }   if (button4.risingEdge()) {     usbMIDI.sendNoteOff(64, 0, channel);  // 64 = E4   }   if (button5.risingEdge()) {     usbMIDI.sendNoteOff(65, 0, channel);  // 65 = F4   }   if (button6.risingEdge()) {     usbMIDI.sendNoteOff(66, 0, channel);  // 66 = F#4   }   if (button7.risingEdge()) {     usbMIDI.sendNoteOff(67, 0, channel);  // 67 = G4   }   if (button8.risingEdge()) {     usbMIDI.sendNoteOff(68, 0, channel);  // 68 = G#4   }   if (button9.risingEdge()) {     usbMIDI.sendNoteOff(69, 0, channel);  // 69 = A5   }   if (button10.risingEdge()) {     usbMIDI.sendNoteOff(70, 0, channel);  // 70 = A#5   }   if (button11.risingEdge()) {     usbMIDI.sendNoteOff(71, 0, channel);  // 71 = B5   }   if (button12.risingEdge()) {     usbMIDI.sendNoteOff(72, 0, channel);  // 72 = C4   // MIDI Controllers should discard incoming MIDI messages.   // http://forum.pjrc.com/threads/24179-Teensy-3-Ableton-Analog-CC-causes-midi-crash   while (usbMIDI.read()) {     // ignore incoming messages   } } // read the input on analog pin 19:   int sensorValue = analogRead(A5);   // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):   float voltage = sensorValue * (5.0 / 1023.0);   // print out the value you read:   Serial.println(voltage); } // read the input on analog pin 23:   int sensorValue = analogRead(A9);   // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):   float voltage = sensorValue * (5.0 / 1023.0);   // print out the value you read:

Topic by abissmusic 1 year ago  |  last reply 1 year ago


There is lot of ic's that can produce ultrasonic Freq. plus. Is it possible to catch the bounce back and trigger relay?

Is it possible to triggering  a relay by freq. shift or tone? Some of those ant-barking curcuits that use 555's is it possible that they could they be modified for proximity detector use? Could  transmitter  catch the signal or tone on the return  the echo bounce and trigger the relay. Also can some of those Max Bot's run directly to a relay and work? 

Question by 9 years ago  |  last reply 3 years ago


halloween hand

Surfing around the internet today I stumbled upon this gem, looks like it would be well suited with some of the other ghoulish delights I've seen bouncing around Instructables. (it's meatloaf!) link

Topic by mikeasaurus 9 years ago  |  last reply 9 years ago


How do I eliminate flickering of 12v led strips driven by arduino PWM?

Hello, I've been working on a project which involves an arduino driving 4 12v led strips with PWM. each of the four strips is run through a TIP122 and can be turned on and off with a momentary switch and can be faded with a potentiometer. When I use the existing code (will post below) for one led strip, it works great. When I scale this up to all 4 strips, there is a flickering or twitching that occurs when I push the momentary switch in. I'm a bit stumped at this point as to how to eliminate this flickering and know that it probably has to do with my code. any suggestions/help would be greatly appreciated. code> #include const int buttonPin1  = 2; // the number of the button pin const int buttonPin2 = 3; const int buttonPin3 = 4; const int buttonPin4 = 7; const int buttonPin5 = 8; const int transistorPin1 = 5; // the number of digital transistor pin const int transistorPin2 = 6; const int transistorPin3 = 9; const int transistorPin4 = 10; const int transistorPin5 = 11; // variables will change: int buttonPushCounter = 0; int buttonState1 = 0; // variable for reading the pushbutton status int buttonState2 = 0; int buttonState3 = 0; int buttonState4 = 0; int buttonState5 = 0; int lastButtonState = 0; int potPin1 = A0; // select the input pin for the potentiometer int potPin2 = A1; int potPin3 = A2; int potPin4 = A3; int potPin5 = A4; int val = 0; // variable to store the value coming from the sensor Bounce bouncer1 = Bounce(buttonPin1, 20); Bounce bouncer2 = Bounce(buttonPin2, 20); // When bouncing another pin change initiator before = Bounce bouncer3 = Bounce(buttonPin3, 20); Bounce bouncer4 = Bounce(buttonPin4, 20); Bounce bouncer5 = Bounce(buttonPin5, 20); void setup() {   pinMode(transistorPin1, OUTPUT); // declare the ledPin as an OUTPUT   pinMode (potPin1, OUTPUT);   pinMode (buttonPin1, INPUT);   pinMode(transistorPin2, OUTPUT); // declare the ledPin as an OUTPUT   pinMode (potPin2, OUTPUT);   pinMode (buttonPin3, INPUT);   pinMode(transistorPin3, OUTPUT); // declare the ledPin as an OUTPUT   pinMode (potPin3, OUTPUT);   pinMode (buttonPin3, INPUT);   pinMode(transistorPin4, OUTPUT); // declare the ledPin as an OUTPUT   pinMode (potPin4, OUTPUT);   pinMode (buttonPin4, INPUT);      pinMode(transistorPin5, OUTPUT); // declare the ledPin as an OUTPUT   pinMode (potPin5, OUTPUT);   pinMode (buttonPin5, INPUT);   Serial.begin(9600); } void loop(){   bouncer1.update();   bouncer2.update();   bouncer3.update();   bouncer4.update();   bouncer5.update();   buttonState1 =  bouncer1.read(); //read the bouncing momentary switches- each associated with the separate switch conditions below.   buttonState2 =  bouncer2.read();   buttonState3 =  bouncer3.read();   buttonState4 =  bouncer4.read();   buttonState5 =  bouncer5.read();   if (buttonState1 != lastButtonState){     if (buttonState1 == HIGH){       buttonPushCounter++;       Serial.println ("on");       Serial.println ("number of button pushes: ");       Serial.println (buttonPushCounter);     }     else {       Serial.println ("off");     }   }   lastButtonState = buttonState1;   if (buttonPushCounter % 2 == 0) {     digitalWrite(transistorPin1, HIGH);       }   else   {     // read the potentiometer:     int sensorValue = analogRead(A0);     // map the sensor value to a range from 0 - 255:     int outputValue = map(sensorValue, 0, 1023, 0, 255);     // use that to control the transistor:     analogWrite(transistorPin1, outputValue);       }   if (buttonState2 != lastButtonState){     if (buttonState2 == HIGH){       buttonPushCounter++;       Serial.println ("on");       Serial.println ("number of button pushes: ");       Serial.println (buttonPushCounter);     }     else {       Serial.println ("off");     }   }   lastButtonState = buttonState2;   if (buttonPushCounter % 2 == 0) {     digitalWrite(transistorPin2, HIGH);       }   else   {     // read the potentiometer:     int sensorValue = analogRead(A1);     // map the sensor value to a range from 0 - 255:     int outputValue = map(sensorValue, 0, 1023, 0, 255);     // use that to control the transistor:     analogWrite(transistorPin2, outputValue);       }   if (buttonState3 != lastButtonState){     if (buttonState3 == HIGH){       buttonPushCounter++;       Serial.println ("on");       Serial.println ("number of button pushes: ");       Serial.println (buttonPushCounter);     }     else {       Serial.println ("off");     }   }   lastButtonState = buttonState3;   if (buttonPushCounter % 2 == 0) {     digitalWrite(transistorPin3, HIGH);       }   else   {     // read the potentiometer:     int sensorValue = analogRead(A2);     // map the sensor value to a range from 0 - 255:     int outputValue = map(sensorValue, 0, 1023, 0, 255);     // use that to control the transistor:     analogWrite(transistorPin3, outputValue);       }   if (buttonState4 != lastButtonState){     if (buttonState4 == HIGH){       buttonPushCounter++;       Serial.println ("on");       Serial.println ("number of button pushes: ");       Serial.println (buttonPushCounter);     }     else {       Serial.println ("off");     }   }   lastButtonState = buttonState4;   if (buttonPushCounter % 2 == 0) {     digitalWrite(transistorPin4, HIGH);       }   else   {     // read the potentiometer:     int sensorValue = analogRead(A3);     // map the sensor value to a range from 0 - 255:     int outputValue = map(sensorValue, 0, 1023, 0, 255);     // use that to control the transistor:     analogWrite(transistorPin4, outputValue);       }      } <code

Question by daleruisky 5 years ago  |  last reply 5 years ago


IR LED's, and the blood stream? Answered

Hey I am in the process of trying out a circuit that will act as a portable pluse checker. I was hoping on using the IR LED's to reflect light from the clot of blood and if it bounces off (which it should) it will be picked up by a IR Detector. The whole project rests on the question if the IR light will bounce off the blood in my veins, and if it will be picked up by the detector. So i ask you....will this work? Please keep in mind I am trying to keep the project simple, so no programming would be great!

Question by TXTCLA55 9 years ago  |  last reply 9 years ago


Football question(American)? Answered

Is a football still live if it bounces off the ground......my freinds say it is but my coach told me that as soon as the ball touches ground its a dead play also do you guys have any tips for a "rookie" cornerback thxs in advance

Question by DELETED_JAZ97 8 years ago  |  last reply 8 years ago


Arduino (uno r3) not in sync, help? Answered

So I'm pretty new to arduino. Got myself an Uno rev3, and all was well for a couple of weeks. Now however, whenever I try to upload a sketch I get an error message telling me this: avrdude: stk500_getsync(): not in sync: resp=0x00 Googling this has not solved anything. I don't think there's anything messed up with the IDE, as I get this in both arduino 1.0.1 and 1.0.2, as well as Visual micro. I tried everything I could think of. Resetting the board did nothing, neither did re-installing drivers or rebooting. The serial bounce test showed no errors, and the Rx LED blinks when I try to upload.  (If you are unaware, the bounce test means connecting Rx to Tx and opening a serial monitor. Everything you send should then be bounced back.) I'm currently thinking bootloader issues, since resetting the board does not make the pin 13 LED blink.  So, does anyone know what to do here? ------------------------------------------------------ UPDATE: I am an idiot. This whole time, I had the atmega328 plugged in backwards. It works now.

Question by Kirbsome! 6 years ago  |  last reply 2 years ago


Yo-yo

Hello, I have been trying to do the trick Boing-E-Boing for a while now, but I just can't get the split-bottom mount right. Whenever I swing it around my finger, it just bounces off the string instead of staying on it. Could someone help me?

Topic by PineapplebobTheGreat 11 years ago  |  last reply 10 years ago


Batch project

I need people that can script/batch to bounce some ides off of. through ideas out and let them get heard, talk about them, ask for help, I will ask some things along the way I'm sure :D!! Batchers Unite!!!!

Topic by spiker 10 years ago  |  last reply 6 years ago


Visible Laser Beam

Hello, Without going into too much detail, a friend and I need to build at least four visible laser beam systems. We were looking on Amazon for visible green lasers but the reviews were so so. We are looking for something that could last for at least an hour and a beam that can be bounced off of multiple mirrors. Thanks

Topic by RipDiesel22 8 years ago  |  last reply 8 years ago


3d printer not homing correctly

Hello, I uploaded marlin firmware to my arduino mega that uses ramps 1.4, and my printer will not home correctly. When I hit home in repetier host, the axis moves a centimeter. have to press the button repeatedly till it hits the endstop, where it bounces back as it should. Where do I fix this in the firmware? 

Question by jbaker22 1 year ago  |  last reply 1 year ago


Website for collaborative design

I'd like a site where people can bounce ideas off each other and work on them together, like a wiki for projects. I thought Instructables was like this, but I guess not. For instance, I posted this idea as a "collaboration":https://www.instructables.com/id/Litter-disposal-for-pigeons/?comments=all#CZLFYJ4FF8XAK65But I guess collaborations are more for writing collaboratively and not collaborative design. Anyone know of anything that does fit the bill?

Topic by endolith 10 years ago


is there any place where elementry wallball is a reconized sport? Answered

What i mean by elementry wallball is the game like dogeball that that bounce the ball of the wall but with 1 person teams, i just want to know so i can back it up so i might likely be able to back it up so its not just for kids

Question by 35Timmy 5 years ago  |  last reply 5 years ago


LED Scanner

Does anyone know how to make a Knight Rider style LED Scanner (the light bounces from one end to the other) ? I've searched the forums and didn't find anything like this.. I would really like to use 7 LED's BTW - This forum rocks! I've tried some of the projects(USB Charger, small LED stuff etc) and they've all turned out great! Thanks in advance!

Topic by milanorex 12 years ago  |  last reply 12 years ago


Making a measure device to fit on quadcopter

Hi i wish to make a measuring device and placing it on a quadcopter soi can measure at hights that are difficult to reach, but I don't wish to use a  bouncing signal, but use like a pen with sensor in it which can be brought down onto a flat surface to mark the start of a measurement and then moved to new location and do the same, what electrical equipment do I need to do such a thing. 

Question by DMTarmey 1 year ago  |  last reply 1 year ago


Phasma - biomimetics as art

On the face of it, Phasma is just another hexapod robot. Get a bit closer, though, and see an interesting difference: it has cable-actuated legs.  Driven the same way as bicycle brakes, they have rubber "knees" to redirect the basic pushing action into useful motion. Speaking of the motion... The whole thing is mechanical in the extreme, but the bouncing cable-drives and scurrying action are very "live".  If this thing ran across my floor, I'd swat it in no short order. Takram Engineering via Notcot.

Topic by Kiteman 8 years ago  |  last reply 8 years ago


ok i need some people to help my bad imagination

I have some projects bouncing around in my head and i want somthing kool and useful. Materials i have: metal tape, cd's, old joysticks, ipod nano i have to get a new batery for. spray paint. I wanted to paint my nano but i hate spending money and i have no money to spend lol. and some old pc parts and stuff Thanks

Topic by fretmelter 12 years ago


Hammerhead Urban X-699 coming out in December

The Hammerhead Urban X-699 is a paper airplane that are toughter than the Hammerhead Urban S-493. It's also a 2nd generation Hammerhead paper airplane and the changes bettwen the 1st generation, is the front is now wind and wall bounce tip and the back has a bit of change as well and that is the more tips! [If you don't know what it mean, wait till December.]

Topic by wat. 8 years ago  |  last reply 7 years ago


Crazy LEGO animation

This LEGO animation has been bouncing all over the Interwebs this weekend. It's pretty stunning stuff since it was all done with LEGO and by one person who clocked 1,500 hours on it. It goes to show how much you can do with a pile of LEGO and a regular digital camera.That all said, the video is still a little slow and can do with about a minute less footage. So I'm definitely curious to see the next video from these guys in another year or so.

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


Semi-Auto Knex Rifle.

I've been working on this gun a long time while bouncing ideas off Mepain. It's a TRUE semi-auto in the fact that all you need to fire a shot is to put the piece in the gun and pull the trigger. I was able to unload a full magazine in less than 10 seconds. I'm a lot more likely to post instructions on this gun than the last two, because this gun works so nicely.Holds 13 shots.Shoots up to 40 feet.Shoots grey connectors.

Topic by oodalumps 11 years ago  |  last reply 9 years ago


Instructables Screensavers!

I just created 3 Instructables screensavers. They feature the instructables robot bouncing around the screen with an instructables logo in the top-left hand corner. The screensavers are:White BGBlack BGTransparent BGIf you have any suggestions or modifications you would like to see in these screensavers, please comment below. If you would like me to make you a custom screensaver, please PM me.Update: I changed the download file to a zip archive. It should stop the download problems

Topic by munchman 10 years ago  |  last reply 10 years ago


Ancient History: Kite bombs

From the article:   We investigate the kite bömb - a never before built medieval siege weapön that dropped bómbs from a kite over cities. We build one and test it with startling new insights and success. We investigate ancient bouncing bõmbs that actually skip across water - ... Source of article.    I saw this on the Ancient Discoveries. Over the weekend I believe, on TV.   The key to stability was a long tail...... Here is a source of information given to me by Kiteman,  concerning the Ancient Kite Bómbs (arial attacks before the airplane or balloon).      

Topic by Goodhart 9 years ago  |  last reply 9 years ago


Instructables Holiday Trampolining Party

For our holiday party, Instructables and a few members of Potenco went trampolining at Sky High Sports. Sky High is essentially a couple of basketball-court-sized areas filled with trampolines. You bounce around like crazy, doing flips, playing dodge ball, and generally exhausting yourself. The potential for bodily injury is high, which for me, makes for an excellent holiday party. Afterward, we stuffed ourselves with Indian food.Today, the day after, everyone is nearly too sore to stand up straight.

Topic by ewilhelm 11 years ago  |  last reply 11 years ago


i wanna make a blood pressure signal generator using purely analog parts.

I found this link : http://www.designnotes.com/downloads/MK105_Assembly.pdf. i was wondering if i could modify this or other suggestions?Or could i just run two together and use a different frequency somehow needs to look similar to this: http://www.biopac.ca/images/img23.gif edit:sorry , i was at work and didnt realise that it would be so confusing, so heres a few details I have access to a 9 Vdc line. using that i need to create a blood pressure signal, where it peaks at 1.2v and lowest is .8V with a slight bounce after thepeak. You can see it in the image that i posted.  i was thinking of using a 555 timer and series of resistors/caps,which i could create a sine wave with it. But how would i go about creating the bounce?  So essentially simulating a perfect blood pressure of 120/80 mmHg , that i could input into my ECG machine or view on an scope. I am also limited to purely analog. So i can use microcontrollers and the likes. But i am allowed to use 555 timers, op-amps etc. BTW the ideas that i have seen are great, especially the one using valves and a sewing motor, i cannot use it unfortunately. I might make it during the summer

Question by doubleunderscore 7 years ago  |  last reply 7 years ago


AdblockPlus help- selective whitelisting?

I have a request that might sound a little strange. Does anyone know if it is possible (and if so, how) to set a blacklist within a whitelist on ABP? Context- I have whitelisted Instructables on adblock because the ad impressions I get help fund the site, but those bouncing flashing multi-coloured seizure inducing "You are the 999,999th visitor congratulations you WON!" adverts drive me to the brink of insanity. Can I, say, whitelist "all adverts on Instructables except GIFs"? Or have a blocking filter for "www.instructables.com/*.gif" that takes precedence over the whitelist?

Topic by PKM 10 years ago  |  last reply 10 years ago


If I wanted to build a small linear accelerator what how would I make the electrostatic generator? Answered

I am going to build a small linear accelerator like the one rutherford used to bounce alpha particles off of a sheet of gold foil. Actually that is exactly what I am going to make. The only thing is that I am not sure how I would generate the electrostatic field. Would a van de graaff generator work, or would I need something different? if I do need something different how would I make it?

Question by Higgs Boson 7 years ago  |  last reply 6 years ago


Massive Rubber Band Ball Destroys car

I was just surfing the interwebs and i found this video.Some guys drive to the top of a hill with a massive rubber band ball in the back of their van and then roll the ball down the hill hoping to hit the car, The ball bounces as it goes down the hill so the first time they roll it they only hit the back of the car, the second roll is a miss but the 3rd time they land it right in the side leading to a surprising amount of damage.Video is a bit bright to begin with but it gets better.Skip to 1:55 for the best hit.

Topic by =SMART= 9 years ago  |  last reply 8 years ago


Led 10 second light? Please help!

I need help building a 2 led light that when you press the button it only stays on for 5 to 10 seconds. i want to have a light sensor so it only works during the night. i guess the exact thing i want is like those childrens balls that when you bounce they flash for a few seconds. i tried buying one and wiring the two leds together to stop the fash but as you can notice my skills with circuits are non existant. please someone help!! 

Question by rebeltruck 7 years ago  |  last reply 7 years ago


Does anyone know a way to do a debounce (sketch) without a delay? Answered

I've been trying to mod an xbox 360 controller with an arduino. Unfortunately the switch I have bounces allot and has really been screwing with my sketch. Long story short I've tried allot of different debounces but as soon as i put a delay (); in anywhere in the sketch the controller just shuts down. I don't know why but i think the people who make the game may have some ant-hacking built into the game. Any help is appreciated. Thanks in advance.   

Question by Zaphod Beetlebrox 7 years ago  |  last reply 7 years ago


Little magical dancing toys... how do they work?? Answered

I was in Italy, and I saw a few street vendors selling these little paper figures in the form of Disney cartoon characters that would dance when music was played. They had little strings for legs, and they seemed to hover magically in the air and bounce around in time to the music. When the vendor turned down the volume, the little thing stopped dancing. I looked at the back of it, and all I saw was a little strip that looked magnetic. I am mystified. Does anyone what these things are called or how they work?

Question by jessejwk 8 years ago  |  last reply 5 years ago


Hilarious Jokes.... XD

Like many others, I am a person that loves to laugh, so if you got any good jokes or hard riddles, let everyone know.  Here are a few of my favorite jokes- Bungee-Jumping in Mexico Two guys are bungee-jumping one day. The first guy says to the second. "You know, we could make a lot of money running our own bungee-jumping service in Mexico." The second guy thinks this is a great idea, so the two pool their money and buy everything they'll need - a tower, an elastic cord, insurance, etc. They travel to Mexico and begin to set up on the square. As they are constructing the tower, a crowd begins to assemble. Slowly, more and more people gather to watch them at work. The first guy jumps. He bounces at the end of the cord, but when he comes back up, the second guy notices that he has a few cuts and scratches. Unfortunately, the second guy isn't able catch him, he falls again, bounces and comes back up again. This time, he is bruised and bleeding. Again, the second guy misses him. The first guy falls again and bounces back up. This time, he comes back pretty messed up - he's got a couple of broken bones and is almost unconscious. Luckily, the second guy finally catches him this time and says, "What happened? Was the cord too long?" The first guy says, "No, the cord was fine, but what the heck is a 'pinata'?" An American, a German, and a Mexican  There is an American, a German, and a Mexican. They are in all in a boat. The boat is about to sink. Each of them have to throw things out to make the boat lighter. The German throws out 4 cases of beer and says, "We have a lot of bear in Germany so we don't need these!" The Mexican throws out 5 cases of burritos and says, "We have a lot of burritos in Mexico so we don't need these!" The American grabs the Mexican and throws him out. The German asks why he threw the Mexican out. And the American replies, "We have a lot of Mexicans in America so we don't need him!."

Topic by Glad(to-meet-ya)ys 9 years ago  |  last reply 8 years ago


antique school bell

OK, i got this antique school bell, i think the date reads 1898 idk its got a little surface rust, i saw this thing sitting on a shelf, and i thought to my self  "how awesome would that be to be hooked up to a door bell" but no matter how hard i look i cant find clear instructions on how to, and what i need to make it work. Ive put some power on it and the hammer just stuck to the coil instead of bouncing back forth. are there any antique gurus who can help me with this issue?   thanks :P

Topic by golddigger1559 7 years ago  |  last reply 7 years ago


Would I be able to extend an amplified antenna's range with a satellite dish?

Hi all, I have a small portable T.V. that will only work when tethered to a converter box. I noticed that when I attached a rabbit ear antenna to the "TV OUT" port on the box, I was able to get signal from the box wirelessly from a few feet away. I had a crazy idea that if I bought an amplified antenna, replaced the LNB on a satellite dish with it, and aimed it at the satellite closest to Earth, I would be able to have the converter box signal bounce back to the T.V. Is this even possible?

Question by Joey5802 2 years ago  |  last reply 2 years ago


how do you program a psp? Answered

 I've been trying to program to psp to access the Ir port. i am trying to make a spy mike it works by making a laser bounce of a window and hit the Ir port of the psp the sound waves vibrate the window creating slight diffrences in the voltage generated by the phototransister now i need to convert that to sond on the psp except i have no idea how to program the psp i dont know anything about c++ but i've been programming in visual basic 2008 for a while now does anybody have any ideas on programs or codes i could use 

Question by lj123456 9 years ago  |  last reply 9 years ago


Need ideas for 2 month old daughter's bouncy seat project

OK...My daughter is 2 months old and is colicy(sp) and only is calm when in her bouncy seat....see image of the bouncy seat we have. here is the funny part, she is only calm when you rock the seat...fast and pretty hard. So I step in the lower corner of the frame and get into a cadance when the thing rocks and she is calm. I need ideas on getting this seat to bounce on its own...I've tried the swings, and she hates them. This and the car are the only thing she likes. THANKS!!!!

Topic by jcistaro 12 years ago  |  last reply 12 years ago


Eating Meat and Overpopulation

I'm not try to start a flame war just wanna bounce some Ideas around. If everyone stopped eating meat and animal products (total vegan). What would happen to the animal population. I think at first it would increase dramatically, then after humans started to consume more and more fruits and vegetables there would be a shortage of food ether for humans or animals (most likely animals). Which would cause a sharp decrees in animal population (possible extinction of species lower on the chain). Or if there is not enough fruits and vegies for humans, they will be forced to eat animals. What do you think?

Topic by TheCheese9921 10 years ago  |  last reply 10 years ago


What do I use to fix Bouncy pogo kids ball.

Karroo Kids were given bouncy pogo balls that they sit on with handles. On which they bounced endlessly. Both now have 1 puncture each (oddly enough, not underneath). Patching with motorcycle/car patches was a bust and did not adhere. I assume the balls are made of vinyl. Unfortunately I am more than familiar with fixing (to the sound of tears) a favourite R5 cheap Chinese import toy with an R80 tube of specialized glue. (while the expensive "cool" toy go ignored! )! Any suggestions?

Question by Karroo Oakey 9 years ago  |  last reply 9 years ago