jet engines

Um yeah just like that guys picture but without the weird background or the guy on the board

Posted by toxin14 6 years ago


This is a place were people who know how to lift rocket and knows about them but it also is for explosive stuff

Posted by poop#1 11 years ago

Air pump

Does anybody know how to make a air pump for an aquarium?? I need it for a Humidifier.

Posted by kris142 10 years ago

Home Page

Is the ads on the side of the site going to be permamnent. I really hope not because it makes the site horrible no offense.

Posted by Newblit 10 years ago

computer question

Does any one know how to bypass administrative priveledges when you are not the administrator/

Posted by bizzy544 8 years ago

Li-ion 5 pin, pinout?

Good Day Fellow TinkerersI have a battery that came out of a Android Tablet that i want to use for another project.It has a cuircuit board attache to the top which i would assume is a over/under charge protector and it has 5 wires coming off of that. 2 x Red, 1 x White and 2 x Black.The two black wires are connected to the same pad on the "protection circuit" and the two red are connected to the same pad. The white wire is on a separate pad i.e. 3 pads, 1 with 2x red, 1 with 2 x black and 1 with 1 x white.I figure the Red would be positive and the Black negative and then i would assume that the white is the Thermistor connection.My Question :How do i connect this externally from the tablet to charge? I figure red and black are the usual, but how do i connect the white wire?Thanks in advance for any help :)

Posted by GhengisKhan1981 6 months ago

Instructables Booth at Maker Faire Day 1

Check out some pictures from the first day of Maker Faire. One day down, and we're already exhausted! We've been tattooing consumer electronics, trying to pop balloons with plasma arcs, and introducing people to the site. If you're in town, come say hello.

Posted by ewilhelm 10 years ago

Use for rulers

I have five wooden 12 inch ruler. I used them in a project and don't need them any more. Does anyone have any ideas on what I can do? I don't want to throw them away. That would be a waste of $2.00. L: 12" W:1" H:~1/4"

Posted by ry25920 10 years ago


Skunk Rifle Published: This is what I am currently working on. The KAR-1 did not meet my expectations as a magazine will always cause some friction. I have revisited an older design with what I learned working on the KAR-1.

Posted by MrRadicalEd 8 years ago


So this is what I came up with eagle for the lm3914 can someone please verify if this will work as intended.

Posted by dominick.j.pezza 3 years ago


I live in Panama and I was wondering if Instructables ships to Panama. If anyone knows please comment. Thanks!

Posted by TheUnknownVariable 2 years ago

I won the burning questions contest...

How do I get my bumper sticker?

Posted by iMac 10 years ago


This is not my website but this is where you can do really awesome things. The website is

Posted by Hobo Joe_ 9 years ago


If I'm viewing a slideshow and I hover over the See More, the slideshow is infront of the menu. Is it just me?

Posted by asasklfjklasfkljasklfjaklfsjkl 8 years ago

Miracle fruit

The miracle fruit page ( is incorrect, it is 3 years to first bear fruit, not 1 foot.

Posted by Anicho 10 years ago

Can someone make~

The "Hobbes" from calvin and hobbes comics? :D

Posted by WhyHello 8 years ago


What music do all of you people listen to? techno/trance/rap/pop/rock/metal/country?

Posted by ravebot 10 years ago

Coke or Pepsi

What pop do you like more coke or pepsi?      Coke      Pepsi          9              1

Posted by luke96 8 years ago

3 Month Pro

Klick here... good luck 2 b the 1st 1

Posted by Jorsz 5 years ago

We've Done It

The Kinno-1, by Kinetic and Innovanna. Enjoy!

Posted by Kinetic 6 years ago

The TwisterRoo Card Trick Tutorial


Posted by LearnMagicTricks101 10 years ago

Fake project

THERE IS A FAKE PROJECT called destilling hydrogen peroxide with salt. it's fake. why it still up?

Posted by eric m 9 years ago


Well here you can say 1 random word (or phrase) that pops into your head.

Posted by Millawi Legend 8 years ago

Assault rifle contest!

The assault rifle competition winner will get a 5 star rating on any 5 instructables/forum topics/groups. (in that order, can mix). the 3 runners up will recieve a 5 star rating to an instructable of their choice.There will be categories, and everyone can vote for one gun in each category. i am only accepting assault rifles - must have a working mag, be the size of a rifle and fire.A voter may only vote up to two of their guns into any of the categories, and must vote something for every category. You may only vote onceCategoriesBest looking assault rifle1.Banana inventors 10 shot auto loading rifle2.-3.-Most innovative assault rifle1.Storm 2232.-3.-Most powerful assault rifle1.Storm 2232.-3.-Most reliable assault rifle1.The Burrito Master's Scar 11.012.-3.-Highest power:pieces ratio (ie. the more power per piece = better)1.Crestind's AST rifle2.-3.-Best overall assault rifle(cannot enter in this category, the guns with the top 3 ammounts of votes in any category will earn a place here)1.Storm 2232.Banana inventors 10 shot auto loading rifle/Crestind's AST rifle/Burrito's Scar 11.013.

Posted by The Jamalam 10 years ago

Distant projects with the kids

Hey everyone. So I'm back on the road for work and hundreds of miles from my amazing wife and awesome minions. It's hard traveling for work and being the husband and father the family expects you to be. So my wife came down to visit for the weekend and I got to thinking. My daughter loves building things and doing electrical projects. So I took the wife to the local hardware store and sent her home with parts and pieces. This week my daughter and I will be building a lamp for her nightstand. I bought her a 1/2" NPT flange, a 10" 1/2" galvanized pipe, a 1/2" coupling, a 1/2" to 1/8" adapter, a 1/8" nipple, an 8' lamp cord, and a lamp socket with a turn key switch. She put it together tonight to get an idea of how it will go together. She's super excited and happy to be doing a project with dad albeit over facetime. It should turn out pretty good. Guess why I'm posting is I just need some community. The hotel room gets lonely and there isn't much to do unless I'm working. So I'd like to strike up some conversations and just learn some new stuff. Thanks for the support and the great uploads. You're all a huge inspiration. Thank you.

Posted by scott.t.wetter 3 years ago

Signed Copies of the Best of Instructables Volume 1

We're selling a limited number of signed Best of Instructables Volume 1! Signatures from Christy, Cloude, Ed, Eric N., Matthew, Noah, Rachel, Randy, Sarah, and me!Signed copies - $40 on our Instructables Store.Or, if you can get enough of our signatures in the picture, unsigned copies - $30 at the Maker Shed. Finally, if you want to save on shipping, copies should arrive in bookstores near the end of the month. See the latest news about The Best of Instructables Volume 1 here.

Posted by ewilhelm 10 years ago

peltier circuit board

Circuit board I need to make a circuit board for a project. It is all 12vdc, I have a 1a fan and a 6a thermoelectric device one setting 1, plus another 6a on setting 2, and a 3rd on setting 3 So 1 is 7a 2 is 13a 3 is 19a How to make the board. Also a second device has the 1a fan plus a 4watt element, plus another 4w on setting 2, plus another 4w on setting 3 So 1 is 1a and I think 0.4a= 1.4a 2 is 1.8a 3 is 2.2a. I think

Posted by Johnieahenderson 2 years ago

Can you make a super small waterproof prototype mp3 player?

I am looking for someone to build a prototype mp3 player that would have the following specifications.  - circular housing and no larger than a U.S. nickel in diameter. - top of the housing would have an insertion for a 1/8 headphone jack. - the height could about 1/4 inch to a 1/2 if need be.  (the smaller the better) - the housing must be waterproof. - the player will autoplay one song when headphone is inserted. Please feel free to contact me here: Thanks, Jimmy

Posted by jacobaa 6 years ago

Alternator use and output

Hail the reader and Bless the respondent. please can someone tell me the following 1. At what speed must a normal vehicle alternator turn to give max output... and what is this out put... I see my charge meter shows it charging at 10 amps... how long to fill the battery at 10 amps? 2. A pack of 6 12v truck batteries connected to make 1 big 12 volt battery... is it possible to charge this pack from more than 1 alternator and will it speed up the charge time to make the battery full to max?

Posted by carnut34 9 years ago

post your favourite k'nex kit!

In this topic you can post your favourite k'nex kit, consisting of: 1 main gun - no size limit 1 main pistol - up to 45 centimetres (17 7/10 inch) 1 extra pistol/gun - up to 20 centimetres (7 8/10 inch) mine is: Danny and mmzdaniels m4 killerk's magnum thanks quincy85wrestler and RazerM the zt465 assault pistol by bunduk i also made a ammo belt (haha, no realy) wich i use to store ammo, the m203 grenades, and the zt465. post yours too! alty

Posted by holeman666 11 years ago

Vivarium Wireing Help..

Hi im building a vivarium for my fat-tail geckos the standerd 1s boar me so i wont something diffrent so i need some help. The viv i have no problems with im already in the middle of the build its just the electrics i cant do. i have an idea it just seeing if it can be done or something neater or similer . At the minut im useing a plastic vivarium with items (3), (5), (6). But item (5) the manul timer is being use instead of item (2) The Microclimate day/night dimming Thermostat as the manual timer is a cheaper option and using it to turn the mat on and off to regulate the temp...... So what im trying to do is have Some thing like item (1) useing this as the main controller . This is what im after :Item (1),(2),(3)(4),(6) in 1 neat package well to run off 1 plug ... I was going to use a fan controller (pc) as this already has 3-5 small neat temp sencers and reads temps and the fan controller disply would looks cool and small and its 12v like the LCD lights ..and was going to use the the fan controller knobs to control White/Blue LCD Lights to turn then on and off ie:White for day and Blue for the night .and 1 of the other control knobs as my be a dimmer switch for the heat mat ...I think ive put that as id like it .. ( Sorry im dyslexics if spelling and dosent make sence in place's) Thanks hope some 1 can help . Oh im rubbish with electrics and forgot to mention that my viv is getting wall mounted as the need for 1 plug.

Posted by pioneer518 7 years ago

PIC18LF4680 microcontroller and usb ttl for usart / serial data

Hi everyone. I want to know if it's possible to connect a ttl device directly to my PIC18LF4680 for serial communication via USART . I can connect the ttl device directly to my Arduino Uno without issues. The ttl  device has 6 pins (dtr , rxd , txd , vcc(3.3v or 5v) , cts, gnd) . I have two different codes snippets below that perform USART communication. * Version one(I) utilizes the "usart.h" peripheral library. * Version two(II) uses "TXREG" and "RCREG" for sending and receiving data. Both versions run well in my virtual environment (Proteus 8 Professional), but not in the real world environment. Am I missing a step? Do I need a special library? Or is it not possible with this chip? VERSION (I)   ------------------------ #include "fuses.h" #include #include #include #include void main(void) {         TRISB = 0x00;     OSCCON = 0x76;          // 8mhz (0111 0110)          LATBbits.LATB4 = 0;      LATBbits.LATB1 = 0;      LATBbits.LATB0 = 0;          unsigned char txt1[] = "Hello World \r\n";     unsigned char txt2[] = "Enter a number.... \r\n";         CloseUSART();         OpenUSART(USART_TX_INT_OFF &             USART_RX_INT_OFF &             USART_ASYNCH_MODE &             USART_EIGHT_BIT &             USART_CONT_RX &             USART_BRGH_HIGH &             USART_ADDEN_OFF ,             52);             for(int x=0;x<=20;x++){__delay_ms(50);}         // write/send intro to PC         while(BusyUSART());     putsUSART((char *)txt1);         for(int x=0;x<20;x++){__delay_ms(50);}         while(BusyUSART());     putsUSART((char *)txt2);             for(int x=0;x<20;x++){__delay_ms(50);}             while(1){         sdata = ReadUSART();                 switch(sdata){             case '1':                 LATBbits.LATB4 = 1;                  LATBbits.LATB1 = 0;                  LATBbits.LATB0 = 0;              break;                         case '2':                 LATBbits.LATB4 = 0;                 LATBbits.LATB1 = 1;                  LATBbits.LATB0 = 0;                             break;                         case '3':                 LATBbits.LATB4 = 0;                  LATBbits.LATB1 = 0;                  LATBbits.LATB0 = 1;              break;                                     default:                 LATBbits.LATB4 = 0;                 LATBbits.LATB1 = 0;                 LATBbits.LATB0 = 0;              break;         }     }     } -------------------------------------------- VERSION (II) --------------------------- #include "fuses.h" #include #include #include #define STRLEN 12 volatile unsigned char t; volatile unsigned char rcindex; volatile unsigned char rcbuf[STRLEN]; void USART_init(void){         TXSTAbits.TXEN = 1;     // enable transmitter     TXSTAbits.BRGH = 1;     // high baud rate mode     RCSTAbits.CREN = 1;     // enable continous receiving     // configure I/O pins     TRISCbits.TRISC7 = 1;     // RX pin is input     TRISCbits.TRISC6 = 1;     // TX pin is input (automatically configured)     SPBRG = 52;                PIE1bits.RCIE = 1;      // enable USART receive interrupt     RCSTAbits.SPEN = 1;     // enable USART         } void USART_putc(unsigned char c) {     while (!TXSTAbits.TRMT); // wait until transmit shift register is empty     TXREG = c;               // write character to TXREG and start transmission } void USART_puts(unsigned char *s) {     while (*s)     {         USART_putc(*s);     // send character pointed to by s         s++;                // increase pointer location to the next character     } } void main(void) {         OSCCON = 0x76;          // 8mhz (0111 0110)         USART_init();         USART_puts("Init complete! \n");     INTCONbits.PEIE = 1;    // enable peripheral interrupts     INTCONbits.GIE = 1;     // enable interrupts     while(1)     {     }     } void interrupt ISR(void) {     if (PIR1bits.RCIF)  // check if receive interrupt has fired     {         t = RCREG;      // read received character to buffer         // check if received character is not new line character         // and that maximum string length has not been reached         if ( (t != '\n') && (rcindex < STRLEN) )         {             rcbuf[rcindex] = t; // append received character to string             rcindex++;          // increment string index         }         else         {             rcindex = 0;        // reset string index             USART_puts(rcbuf);  // echo received string         }         PIR1bits.RCIF = 0;      // reset receive interrupt flag     } } ------------------------------------------------------------ Any and all help is appreciated. Thanks!

Posted by newbie14 2 years ago

Honolulu MiniMakers Faire

The 3rd annual Mini Maker Faire in Honolulu from noon to 5 pm on Saturday, June 25th, 2016. Part science fair, part county fair, and part something entirely new, Maker Faire is an all-ages gathering of tech enthusiasts, crafters, educators, tinkerers, hobbyists, engineers, science clubs, authors, artists, students, and commercial exhibitors. All of these “makers” come to Maker Faire to show what they have made and to share what they have learned. Attendance is Free!  Free parking is available onsite. Scheduled events at the faire: Drone Racer-X Circuit Skills Course: This is a timed event where the operator must fly their drone through multiple obstacles.  The goal is to complete all challenges in the shortest time. 1 12:00 – 12:30 pm 2 12:30 –   1:00 pm 3   1:00 –    1:30 pm 4   1:30 –    2:00 pm Speed Course: The race will consist of three laps around the course.   At the completion of the last lap the pilot will land on a predetermined landing zone for additional seconds bonus. 1 2:30 – 3:00 pm 2 3:00 – 3:30 pm 3 3:30  - 4:00 pm 4 4:00 – 4:30 pm NOTE:  There will be an awards ceremony for the Racer-X Circuits at approx. 4:45 pm by the Baseball Field Soldering Workshop (1st Floor): This is a great introduction to soldering.  Each session will take approx. 30 minutes starting at noon with the last session starting at 4:30 pm. 1 12:00 – 12:30 pm 6 2:30 – 3:00 pm 2 12:30 –   1:00 pm 7 3:00 – 3:30 pm 3   1:00 –   1:30 pm 8 3:30 – 4:00 pm 4   1:30 –   2:00 pm 9 4:00 – 4:30 pm 5   2:00 –   2:30 pm 10 4:30 – 5:00 pm Internet of Things - Build a Raspberry Pi media server workshop (4th Floor) : Learn about the building blocks of the Internet of Things and how a tiny $35 single board computer called the Raspberry Pi has become one of the most popular starting points for automating everything from plant watering and hydroponics, to internet surveillance cameras to robots. 1 1:00 – 2:00 pm 2 2:00 – 3:00 pm 3 3:00 – 4:00 pm 4 4:00 – 5:00 pm Presentations (3rd Floor):  1 12:30 –  1:15 PM Noel Kawano: Recent advancements in 3D and high resolution displays has enabled a news means of creating immersive display environments at the commercial level, developing and prototyping a new class of CyberCANOE to study and challenge existing VR environments. 2   1:30 –   2:15 PM Jerry Isdale: Virtual Reality 2.0.16.  This talk will provide an overview of the multiple technologies, applications, challenges and opportunities for Virtual, Augmented and Mixed Reality systems. 3   2:30 –   3:15 PM Melissa May White: Moving Hawaii Fashion Forward.  Melissa will discuss current initiatives to revitalize Made in Hawaii fashion, and share her perspective on the past, present, and future of Hawaii fashion as a key part of Hawaii's maker community. 4   3:45 –   4:15 PM Ted Ralston: Flying your Drone Legally.  One of the first things you want to do after building your own drone is to fly it of course.  Learn about the latest rules and regulations. Sponsors High Technology Development Corporation (HTDC) ‘Iolani School; Maui Makers UH SOEST Advanced Network Computing Lab HICapacity Computational Thinkers Entrepreneurs Foundation of Hawaii Oahu Makerspace.

Posted by CrLz 2 years ago

lets trade kits

I will trade for your random parts i mostly very big LED's or LED displays or any electronics you dont need that are in OK or acceptable condition for upcoming school science fair (don't live near radio shack) i will trade my electronics kit to you it includes.2-POSITION ROTARY SWITCH condition=mint about the size=of the tip of your thumb to the middle joint.3 pin stereo jack 2 peices condition=mintsize= of a nickel.mono and disk capacitor condition=OK (sightly scratched leads)1 film capacitor condition=mint1 resistor 260 Ohms condition=good1 toroid with copper wire 1 without condition=mintsize= 2cm in circumferencesize=a dimeIR RECEIVER FOR REMOTE CONTROL condition=okand 5 other unknown peices (sensors and capacitors)

Posted by albylovesscience 9 years ago

Quantitative Measure of Attempts to Influence Vote in Ohio

A good friend, who lives in Ohio, sent me this about various attempts to influence his voting in the democratic primary: So despite being towards the end of the calendar, Ohio is once again at the forefront of presidential election silliness. I submit for your consideration the number of attempts to influence our household vote via various means: calls by volunteers(a): obama 2, hillary 0 robocalls: obama 1, hillary 4 door-to-door visits by volunteers: obama 2, hillary 0 negative attack mailings sent by candidate: obama 1, hillary 3 unprompted invocations of candidate's name by one's toddler(b): obama 1, hillary 0 (a) Possibly but unlikely paid operatives (b) "Barack! Obama! Barack! Obama! Barack! Obama! Barack! Obama!" counts as only 1 invocation.

Posted by ewilhelm 10 years ago

knexsayer review *UPDATE*

Ksayer! power:?/10 range:?/10 strengh:9/10 knex used:1/10(it uses a ton of knex) braking points:thanks to my mods it works theonly part that breaks now is the pump arm the pics dont show the mod parts list: rods green:336 white:162 blue:22 yellow:24 red:7 gray:6 black:7 yellow/orange:1 connectors dark gray:82 orange:22 lt gray:41 red:55 green:46 yellow:172 white:29 blue:6 tan clip:16 black/blue hinge:6 (toghther) blue clip:1 other y clip:13 small black tires:6 ball socket:8 ball joint:1 blue spacer:43 gray spacer:7 small gray tire:11

Posted by knexsuperbuilderfreak 9 years ago

Display buzzer

I am not good at designing electronics. Could someone point me in the direction of a suitable circuit to do this... I have a device with a backlight on an led display, the backlight is normally on but can be switched off sometimes the backlight flashes to alert the user. on for 1 sec, off for 1 sec approx. I want to add a circuit to it without changing the existing circuitry when the backlight comes on I want a buzzer to sound for 1/2 sec if the backlight is on then nothing happens, nor should it buzz when the light goes off. So: 1. switch on device, backlight comes on, Buzz 2. backlight is on for length of time but no buzzing 3. backlight starts flashing 4. goes off, No buzz 5. goes on, Buzz 6. repeat from 4 until the backlight stays on this circuit and buzzer is going to have to be very compact to fit in the device. I might substitute a phone vibrate for the buzzer. Any suggestions ?

Posted by scubascooby 9 years ago


I am wondering if you run a led at full voltage and amps then as you add more resistance light output goes down here is my question 1 led at 20ma or 2 led at 10ma do not 2 leds give more light than 1. Like is light output a linear taper to amount of current applied or is it more of an audio taper?

Posted by John1397 4 years ago

Pro membership gift

I just wanted to thank you guys at instructables for my 1 year membership for my instructable "Small-vival kit". It really meant a lot to me to feel important on this website since I love it here so much. Thank you all and have a nice year, you'll be seeing more of me!!!

Posted by trans4mation 6 years ago

Knex Contest Micro Guns

A knexing contest. Rules: 1 No more than 50 pieces. 2 1 handed 3 Right handed Guns will be judged for reliabillity,  power, sturdieness and looks. Entry dead line is 30 of April The prize is a patch, 5* ratings in all instructables and a Subscription.

Posted by knex gun builder freak 8 years ago

Knex Concept: 1

So just something quick. I got this idea for a more powerful semi-auto. Its basicly a slingshot, when you pull the trigger it pulls back the band and releases it in a smooth motion. Then you pull the trigger back and repeat.  Its nothing speicial, I can't even work on it now because of the railgun though.

Posted by didexo 6 years ago


Which guns do you like.i personaly like the assault rifle.i also like the brute plazma rifle.

Posted by nfk11 8 years ago

laser help

How do you take apart a conventional laserpointer like the ones that you get at pet stores?

Posted by kris142 10 years ago


Hi folks,   Anybody know the cheapest tool kit electronics work for mobile & circuit design kit making.

Posted by rampro 2 years ago

Age Not Displayed in Answers listing

.  Getting the following in Answers listings : Asked in Tech by Stickerdude [date] Answers: 1

Posted by NachoMahma 8 years ago


Hey, lead ninja here! Please start adding instructables, we need them to promote our group!

Posted by gen.badger 10 years ago


Does any one know how to spy other computer remotely? I am so curious about it. thanks guys!!

Posted by diki83 8 years ago