Help with ipad camera connection kit

Hello all can you please help me, I want to make a camera connection kit to my ipad but there is no single way, how can I do that, i found a lot of it on the net (called otg cables)

Topic by msaad11   |  last reply


soft serial communication on Arduino Micro.

Hello all, I have a few Arduino Micro units, and need to connect them together (in a mesh network) so that every unit in it is interchangeable, meaning that any unit may be in connection with more than one unit. As the Master/Slave form is out of question at this stage (because any given unit cannot be both Master and Slave at the same time, of course) I decided to go for a simple serial communication. However the Arduino Micro units (and frankly none of the Arduinos) do not have sufficient serial pins and I was advised to use Soft Serial instead. I was looking into the pin out of the Arduino Micro but cannot quite figure out which pins I can use for the serial comm.; I need 4 to 6 serial communications. Any help is much appreciated, as the nature of the problem may not be changed. So I need to solve it as it is. Karim.

Topic by karimskarim   |  last reply


RFID READER HELP

Hello, can anyone help me design an RFID reader which can tell me when something is missing. I would like to build a reader for my file cabinet. I know this is hard but the reader will have to keep reading the files by maybe pinging and when a file is missing from the cabinet an LED will light up and maybe a small readout telling me what file is gone. Cabinet is small only 300mm so if anything is more than 300mm away from the reader it will light up. Can anyone help?

Topic by BryceK2   |  last reply


Macbook Pro and Following Heartbreak

I have a problem and the people on Instructables are so smart I am hoping someone can advise me.   A year ago I used my Macbook Pro in my kitchen and happened to leave it on the kitchen table over night. I never did this before.  We had a huge storm that night and my roof leaked.  I had it repaired following Hurricane Ike and it had been fine but then something happened (I got it fixed - kind of like locking the gate after the cows get out)  and that one night was the only time I ever left my computer there or had a roof leak that was pretty bad and covered my entire table with water. When I saw my table and computer I thought I would fall out!  I picked up the computer and water ran out of it!  I didn't know then to take the battery out and let it dry out completely and I don't know if it would have worked anyway.  I whined for a day or two and then bought a new Macbook Pro.  Now I can get it to power up and it seems like it is working but there is no display. First I wonder is there a way to get that computer to work again.....Second - Is there a way to recover my videos and pictures even if that computer never works again so I can have the pictures of my best friend who recently passed away and have the pictures and videos of the wildlife I love to photograph? I am a principal so I take a lot of pictures and videos at school and make videos for students and staff.  Previously I was the assistant principal and my best friend was my principal and I have a lot of video and pictures of all the fun stuff we used to do just on off time or at school.  My best friend and principal ended up with a brain tumor and passed away a few months ago. She was young and vibrant and larger than life. The staff I inherited from her would love to see some of our videos and pictures from the days when she was healthy and our principal.  It really bothers me that I can't get my videos and pictures for both reasons, the loss of the videos that would remind me and my staff of fun times with my friend at school and because of the animal videos I feel I have lost that I would love to be able to see and use again.I spend my free time making videos and doing animal photography. I have 10 game cameras set up on my property in East Texas and I love to watch the animals.  All of my previous pictures, video, etc....is on that hard drive. I removed it and I can save to it but I can not open up the picture and videos on it. The new Macbook has updated software and I have not been able to open up iPhoto, IMovie, or IDVD and get my my pictures and videos from it.    I really wish I could get those images and videos back.   I now have that hard drive in a hard case to be used as an external hard drive.   If you read all of this, Thank you! If you have any helpful ideas I would love to hear them.  If you have any interest in the type of videos I make feel free to visit my Youtube channel at FoxysMyGirl@youtube.com  Foxy was my first great dane and I was crazy in love with that dog hence the username!   Thank you! Amy

Topic by FoxysMyGirl   |  last reply


Just picked up a strip of LEDs...need a power supply for them

I just bought these http://amzn.to/1HgdTOC by accident (One-Click buying...lol) and I figured instead of returning them and getting my money back, I could actually use them around my room. The only problem is, I'm not too sure how to actually power them. From what I understand, they require a 12V 5A power supply. Is there anything common I might have in my house that I could use to power these? If not, where can I pick one up cheap-ish and with fast shipping? Edit: forgot to mention I own a Dioder kit from IKEA, would it be possible to use the power supply from that? The label on it says 12V, but only .42A so I doubt it.

Topic by ZachI1   |  last reply


Please help me

Hello all  can you please help me, I want to make a camera connection kit to my ipad but there is no single way, how can I do that, i found a lot of it on the net (called otg cables) 

Topic by msaad11   |  last reply


DIY DS Lite breakout board

Does anyone think it would be possible to make a ds breakout board as the schematic is extremely simple as shown here: https://www.sparkfun.com/datasheets/BreakoutBoards/DS_Touch_connector_breakout.pdf I want to make something quite quickly and had a broken ds lying around as was wondering if this was possible... Also does anyone else have any ideas of what i could make? Thanks Make-O-Saurus

Topic by makeosaurus   |  last reply


can i talk to multiple arduinos at the same time with another arduino, in a serial format?

Hello all, I am trying to talk to multiple (say 4) microcontrollers (Arduinos) at the same time. I was wondering if i can setup a serial connection, with a selection line that can detect the neighbor Arduino and enable the corresponding pin to start the serial communication between the two. something like this:

Topic by karimskarim   |  last reply


Potentiometer not working after connected to wires

Hi, I'm fairly new to electronics and I'm trying to learn it with my Arduino. Recently I have been working on a project that involves 4 potentiometer(pot). I'm using one 1k pot and 3 10k pot. The pot is used to send signals to the analog inputs of the arduino. To test the pots I used a simple serial.println program that sends the value of the pot from 0 - 1023. When I connect the pot through its 3 pins directly to the breadboard, all of them work perfectly fine and gives me a stable value as I turn the pot. However, when I soldered three wires to them each, 2 of them work and 2 of them didnt. The 1k and one of the 10k pot didnt work. When I connected it through its wires, the values it gave kept jumping even when I'm not turning the knob and sometimes it will just stay one value when I'm turning it or not. Why is this happening? Did I overheat the pot when soldering? I took some new pots and tested them again through the pins directly and it worked perfectly fine. But when I soldered the wires to it, this time the 10k worked fine and the 1k didnt work. It gave the same problem as the ones before. Please help me with this problem. I have attached the pictures of the pots that didn't work. Please help me check if my soldering is anything wrong. I have checked online couldn't fine anyone experiencing the same problem. TQ! 

Topic by KhayhenS   |  last reply


Measuring the piezo transducer with oscilloscope

Hi, I am conecting a piezo disc as a microphone to pick up vibrations. .The problemm is when I measure the signal with osciloscope I am getting a messy and modified one with many noise  If I am measuring it with PC oscilloscope (threw the sound card mic input) I am gatting a clean desirable signal What is the true signal and what I am doing bad with the oscilloscope. Thanks! Anna

Topic by AnnaL3   |  last reply


How to get speed data from a car??

Hi! I try to get speed data from a vehicle(Hunday Accent) by using Arduino UNO and Seeed CAN-BUS Shield. I get some data but i dont know how to get speed information by using them. I have attached a pic showing what i get. Anybody tell me please what all those numbers mean and how can i convert them into speed information? Thanks in advance :) P.S. I have attached the library i used, as well.

Topic by Ninikoveliashvili   |  last reply


Temperature stabilizer system with peltier battery

Hello everyone! I have a thesis to design a temperature stabilizing(controlling) system for solar cells.I need to use 12V Peltier battery and a simple pc fan.Any further help is appreciated.

Topic by UgurO   |  last reply


Can you help me with my mini E.M.P. generator design?

Hello everyone! I am currently planning on bulding a handheld E.M.P. generator (it's dangerous, I know, sorry) that is capable of killing a small devices (e.g. a small camera) at close range (<10cm). I got to the capacitor bank and wondered if 180J is enough for my needs? I also have some other questions (in no particular order): - What is the bare minimum to kill such devices? - Does it normally take 90 secs to charge a 90uF bank to 2kV (using a DC boost converter)? I have never designed a high voltage charging circuit before so I don't really know if I'm doing things right. - Is my capacitor configuration good enough or does it need tweaking (e.g. more voltage)? - How do I protect my circuitry from getting blasted by the coil? - Is a single pulse sufficient? - What kind of switch should I use for high voltage? - Should I use lithium-ion batteries for supplying power? - Should I make the frame of the device out of metal? - Should I be using a DC boost converter for charging capacitors? If not, suggestion? - Should my coil have a little or a lot of inductance? Again, I am fully aware this has "Darwin Award" written all over, sorry about that, but I think this is safer than guessing around. Thank you for reading this! Looking forward to your responds!

Topic by mr.derpinton   |  last reply


Gears for Servos and Steppers

Hey guys (and gals), I've been researching this a lot, but I still haven't the solution.  When you are working on a project and you need a gear for your stepper or servo, where do you acquire it?  For example I work a lot with TowerPro 996 servos, but I haven't found any third parties selling gears for them.   Same thing for motors.  If you are using a stepper motor, like a NEMA or something where do you find a gear that attaches to it? 

Topic by Deft Punk   |  last reply


help creating a biosensor prototype

I will attempt to be as concise as possible. That said, please bare with me if things are explained as well as they need to be, I am very new to this. Determined, but still a novice. I am conducting research as part of an effort to create a wearable prototype. Essentially, I need to combine a ppg heart rate monitor with a infrared thermometer (to measure skin temperature) and to have both devices maintain bluetooth capability. Any input in regards to this would be amazing.  More specifically, I am wondering if there are any DIY ppg heart rate monitor and/or infrared thermometer starter kits? Or resources that will assist with building these elements, aside from tutorials. I ask because it is a challenge to uncover all of the nuance and intricacies with electrical engineering and design without having a sufficient background.  For instance, it is clearly possible to add a bluetooth component to a heart rate monitor, but I am unsure if the two components (ppg hrm and infrared therm) must "talk" to each other while maintaining a bluetooth connection to a website or some other device.  If this is all as "simple" as building these devices separately and adding a bluetooth component to each of them, it would be greatly appreciated if you can provide a specific link to easy sources to obtain the components. I think I can follow along the tutorials, though there are still questions there.  Salud

Topic by ChrisU2   |  last reply


Arduino magnetic card reader with tape head

How can i make a arduino magnetic card reader with only a bare tape head without external circuitry 

Topic by atharva12   |  last reply


Using Xbox wireless controller on pc

I am wanting to use my wireless xbox controller from my xbox on my pc, I do not have a wireless receiver for my pc, however I do have a data cable for the controller, would this work as a substitute for a wireless receiver.

Topic by shotgunshane   |  last reply


Arduino bluetooth control

So, I've been on a project where i am trying to use a generic bluetooth gamepad to control dc motors through a HC05 bluetooth module connected to an arduino. I have no idea on where to start. I did some research about it but there dosent seem to be much information thats appropriate for this project. here is what im using now: -ipega bluetooth controller -arduino mega 2560 -HC-05 bluetooth module

Topic by thomasmanman   |  last reply


Carbon Fibre Flywheel (for energy storage)

I'd like to build a flywheel but I'm not sure what I need to know before i start, Is it difficult to do? Is it possible to accomplish with off the shelf parts? Any help at all would be appreciated greatly.

Topic by nuncoop   |  last reply


Velleman Sound to Light module LEDs always on.

I  have made the velleman sound to light project: http://www.vellemanusa.com/downloads/0/minikits/manuals/manual_mk103_rev1.pdf the LEDs are supposed to turn off when there is no sound and go bright when there are loud sounds. Mine are bright all the time. I first tried the kit using my own blue LEDs instead of the red ones supplied, these worked for a time then they just stated to give a VERY small amount of light. I switched to the red ones and now they are on high all the time. I also accidentaly connected R3 with C4 (see PDF). C1 and R2 are also connected by solder, im not sure if it should be like that, I also kinda damaged the C1 connection hole as I partially burnt it with my soldering iron D:.  Could any of these issues be the reason why my kit inst working? I have attached pictures of my board Many thanks, Rushmoore :)

Topic by Rushmoore   |  last reply


[Arduino] Problem connection Bluetooth

Hi all, A while ago I got a HC06 bluetooth module. In the beginning everything worked OK, but now some problems have appeared. Pairing in Android works fine, as well as with my laptop. The problem arises when connecting my phone (Google Android 4.2 with Bluetooth 2.0 + EDR) to the device. BlueTooth Serial Controller 16 seems the only working app, but I would like to use my own application, based on the code described here https://www.instructables.com/id/Android-Bluetooth-Control-LED-Part-2/step8/Download/ Also other apps like BlueSerial Beta and Bluetooth ssp pro do not work. Does anyone have a clue how to solve this problem? Many thanks in advance. Regards, Zytro

Topic by zytro   |  last reply


Solar Cell Phone Chargers

Solar Cell Phone Chargers Since we all walk many hours in the sun each day, does anyone have knowledge of a functional solar charger for phones or cameras?

Topic by weijing3333   |  last reply


(Arduino) automated macro-photography rail

Hi everyone, I would like to build an Arduino automated macro-photography rail (let's call it AAMR). I'm a decent software engineer and I want to learn electronics, so I'm looking for someone telling me I'm going in the right direction... The idea sounds simple, I want to : 1/ place the subject on the AAMR 2/ input the # of pictures needed to perform a "focus stacking" (https://en.wikipedia.org/?title=Focus_stacking) 3/ push the start button and make the AAMR loop n times through the following steps : - trigger the camera to take a picture of the subject - move the subject 1 millimetre toward the camera After a couple weeks reading and day-dreaming, here are my thoughts. I need : - to read more :) - a steeper motor and its driver (I own bipolar steppers and L298 / L293 IC) - to trigger the camera (Canon EOS 70d : remote cable is quite easy to make) - a potentiometer and 2* 7segment displays (input and display the # of pictures) - a start button - a reset button to make the rail come back at position Zero - two "end of course" buttons (not sure about the English terminology), just in case the motor wants to jump over the board - power (5v for the arduino and the logic, 12v for the motors) I. Arduino ---------- First things first, I plan to use an Arduino Uno during prototyping and replace it by a home made board in the final product. Uno has 14 Digital I/O Pins and 6 Analog Input Pins : - stepper => 6 Digital pins (3 ?? if using http://www.bristolwatch.com/L298N/L298N_arduino.htm) - 7segment led => 3 Digital pins if using shift registers (https://www.instructables.com/id/Different-methods-of-driving-7-Segment-LED-display/step5/null/) - start button => 1 Digital pin - reset button => 1 Digital pin - "end of course" buttons => 2 Digital pins - camera trigger => 1 Digital pin (to drive an opto isolator / solid state relay) - potentiometer => 1 Analog pin 14 Digital pins ! Uno should do the job, am I right ? (I know I could use Analog pins as Digital ones, but it seems I don't need it...) II. PSU ------- Next interrogation is about power supply : I don't want a battery powered device and my options are scarce : - ATX PSU supplies both 5 and 12v, but Arduino seems to like >5v, so ATX doesn't seem a good choice - home made PSU from an existing wall wart -> voltage divider to get ~7v and ~14v -> 7805/7812 voltage regulator (may need heatsinks and/or little fan) If I do the math : - Arduino : 50ma - Stepper motor : 700mA max - L298 : 70mA (quiescent current) - 2* 7Segment LED (multiplexed) : 2 * 80mA (estimated) - Shift registers IC (SN74HC595N) : 1ma (optional : Hex inverter 74LS04 : ?? mA) Total : around 980mA... Am I doing right ? I have tons of questions left (Hex inverter, filter capacitors, motor noise reduction, solid state relays...), but it's a good start :) Sorry for the long post, and thanks in advance for your answers ! D

Topic by djezzz   |  last reply


Ball counter or weight sensor with relay to sound alarm or trigger 9v confetti cannon

Anyone interested in a bit of work...I could also run it as a competition. Apologies in advance if what I am doing in not allowed on instructables, but I couldn't find a place to offer this work. Peoplehour does not specialise in tech gadgets! I am a one man band training business in the UK. I am trying to find someone to make this gadget to work with my Gravity Ball Game. Gravity Ball is a two hour team building activity. Gravity Ball requires teams to design and build a construction capable of transporting a ball from one zone to another; the ball must roll freely along the construction using gravity only. There will be a shared zone that will require team collaboration, co­operation and coordination. Everyone needs to contribute to the overall team objective whilst ensuring their own structure functions to a specific brief and works correctly. All teams will release their designated ball (tennis ball, golf ball, cricket ball, squash ball. Etc.) at the same time. Each team ball will roll freely along the team structure, into the shared area and the fall into a collection container. When all the balls are in the container (and a specific weight achieved) then the Weight sensitive relay switch will detonate a electronic confetti cannon. Alternatively, an infra red or sensor can count the number of balls that pass at a particular point and when the designated number is reached, the confetti cannon will detonate The detonation will give a wow factor to the team activity. Considerations: I need a gadget, Arduino, raspberry pi or beaglebone that can measure or count the number of ball and then detonate a confetti cannon or sound an alarm • Programmable weight or ball counter setting • Maximum weight 300g-400g or Maximum number of passing balls is 10 • Work with standard electronic confetti cannon from Confetti Masters, alarm or Siren (http://www.confettimaster.com/streamer.electric.confetti.cannons.html) or Showtec electric cannons (http://www.sblite.co.uk/598-80cm-multicolour-electric-confetti-cannon.html) Message me if you are interested! Kind regards Canute

Topic by GreenflashUK 


charging

Hello sir,  Im intrested in solenoids feild and wanna have practical experince in that.can you please tell me how to generate electrical charge by using solenoids and storing that charge in mica capacitors with less voltage rating high storage capability..which also has slow discharge. The time of storing the charge should be high.Hope will guide me. Thankyou. Raghudeep,

Topic by RaghuC   |  last reply


Laser Engraver Circuit Help

Hello. I am making my own laser engraver out of 2 DVD burners just like Groovers version. I have some questions about the circuit that im going to use: I have seen the typical LM317 circuit for laser diodes (LINK HERE) I dont completely understand the circuit Groover made. He says that he uses the LM317 circuit over, but it does not look exactly the same. Can someone explain to me a bit why his values on the resistors/capacitors etc. is so damn different? (Though he also use relays and stuff for outputs for fans ) (LINK TO GROOVERS CIRCUIT) I made my own circuit that uses the typical LM317 circuit over, but will my circuit work fine? (Instead of the battery in the circuit, I will connect the Voltage In-ping on the LM317 to my arduino, but not exactly sure where to connect it on the arduino since i need about 7.5 V in, and not sure if the arduino got a pin that can output that much?) (LINK TO MY CIRCUIT) Thank you for your reply!

Topic by aborge   |  last reply


Wearable Technology

Which is the most innovative wearable technology till date?

Topic by v_s   |  last reply


Arduino uno &Gsm modem

Can any body tell me that is there any difference btwn. Arduino gsm-shild  and normal gsm modem .?Do i have to code Arduino differently to send data when i'm using normal gsm modem ..?? and how can i connect Arduino-Uno to normal gsm modem..???

Topic by MeetR   |  last reply


Bluetooth sensor

Hey guys, I like electronics but I want to learn about bluetooth interfacing. As a start I want to send a signal from a push button/sensor to another bluetooth receiver (phone for example). To be honest I have no idea where to start from. Can you help me out?

Topic by pjreijiri   |  last reply


How to add 2nd battery to circuit or increase voltage

I have a Normally Closed NPN inductive proximity sensor which operates at 10V. I use it to control a load (light bulb), which is normally on, and goes off when the proximity sensor detects metal. The problem is that I need to work with portable batteries, or something like an acid battery, and ideally not exceed 12V for safety reasons. Since the sensor needs 10V to operate, this only leaves me with 2V for the light bulb. I need to increase the voltage to the light bulb so that I can use a decent light source. Is there a way of adding a 2nd battery to the circuit so that the bulb has its own power source, yet that too is controlled by the sensor (otherwise the bulb would just stay on continuously). Any other solution would also be appreciated. Current circuit diagram attached. Thank you.

Topic by nathanimate   |  last reply


Webcam to Video Capture Card (s-video)

I have a webcam (usb) which I want to connect to video capture card (Osprey 100) having s-video input port. How could I do this? Is it possible? 

Topic by Zoliana   |  last reply


IMovie Help: how to change the speed of a clip

Hey everybody I was editing some video and found out that the option of changing the speed of the clip is greyed out. Anybody know how to solve this problem? Thank You Im using OS X Yosemite 

Topic by robo10302   |  last reply


Individually Addressable Speaker Array

Hey! I had an idea for an array of many small speakers, each capable of playing different sounds so I could dynamically re-arrange which speaker is playing what. This would be paired with some LEDs and some water to make (what I hope will be) a fantastic visual effect. But of course all this is a bit over my head, so I'd like some feedback on my idea! After a bit of research, here's how I think I'll do it: General Concept Essentially what I'm trying to do is make a waveform generator with lots and lots of separate channels. I would hook up my microcontroller to several, multi-channel Digital to Analog Converters (DACs). The microcontroller would feed these DACs signals to generate the wave forms that I want for each individual speaker. The waveforms that the DACs output would each go through an extremely simple amplifier. The amplified signal would go to my speakers. I've attached a diagram that should give you a better idea of what I'm doing. Specifics The microcontrollers I'm looking at are the ChipKIT series from Digilent because I have access to a bunch of these. I'm currently planning on using the uC32, but I actually have access to pretty much all their other boards. The uC32 runs at 80MHz. The DAC I'm looking at is the AD5628 from Analog Devices. That's used in Digilent's PmodDA4, which I also have access to. Alternatively I might just order a bunch. They have 8 analogue outputs, and the SPI communication can run at 50MHz clock speed. I'm planning to have eight of these (for 8^2 total outputs). I haven't figured out what amplifier I'm going to use yet. It'll need to be simple and cheap, as I'm expecting to have 8^2 of them, but I'd also like one that can operate over a large band of frequencies. I've also attached two pictures of the speakers I'm planning to use. I kinda randomly acquired a lot of these, so I'd rather not switch to a different speaker type. According to Wikipedia, the highest note on a piano keyboard is a little over 4kHz. If I split the sinusoidal wave into 16 segments, that means an update frequency of 76kHz. This is way below my max operating speed of 50MHz so I think I can get away with it. Questions What am I doing wrong? I'm hardly an expert on any of this, so I'm certain there's a much simpler way. Are there ICs that do what I want? Maybe something that takes in a digital signal and outputs waveforms? This would be similar to how a servo controller would output different PWM signals, only changing the frequency rather than the duty cycle. What sort of amplifiers should I be looking at? This is my first time on the forum so please let me know if I'm doing anything wrong (or could do anything better).

Topic by JayWeeks   |  last reply


Help with Canon Pixma Stepper

Hey all- Looking for some help with this little motor I pulled from a scrap Canon Pixma.  I want to use it to drive a very basic tumbler for 3d printed parts. I'm using it and the geared shaft to drive the drum.  Can I run this directly from a wall-wart, and if so, can you tell me what flavor to look for?  I'd like to just solder barrel connectors on and run with it. Thanks, Jeff

Topic by jeffw75   |  last reply


Uploading a single sketch to multiple arduino boards

Hi, I want to upload the same sketch to multiple arduino boards, say for eg 15 to 20 arduino uno boards. What could be the easiest way to do so? Thank You,

Topic by xshanky   |  last reply


Where to get microcontrollers in India?

Tonnes of instructables are based on microcontrollers, and i can't seem to find any. I can't get anything off of the internet, so that does no count. by the way, i live in india. And I will appreciate any help, just reply even if you think it would not be very helpful, it might just be.

Topic by DrCoolSanta   |  last reply


Android App Design with App Inventor Tutorial Paint App 1 of 3

Https://www.instructables.com/id/Android-Development-with-App-Inventor-Tutorial-1-o/ This is my first tutorial on instrucables~and will include 3 tutorials! Click on the link and enjoy, comment, and favorite!!

Topic by authorhaider 


DC toy motor as cooling fan

I used a dc toy motor to make a cooling fan. i made the connections to draw power using usb.but 3rd time when i plugged , the laptop didnt start. i called service centre and they said to replace motherboard. fortunately i had warranty. why this happens ?????

Topic by adonis ajith   |  last reply


Moving Three Servos at Once

Hey Guys, I'm working on a project and I'm trying to figure out what power supply to use.  I have power supply rated for 5V and .7A.  I was going to test this power supply out by making all servos sweep back and forth at once, and see how it performs.  This question is main for the coders out there.  Is the following code correct?  I've had a long work day and I'm about to pass out and I was hoping if someone could critique this real quick.  Thanks in advance! /* Sweep by BARRAGAN This example code is in the public domain. modified 8 Nov 2013 by Scott Fitzgerald http://arduino.cc/en/Tutorial/Sweep */ #include Servo myservo01;  // create servo object  Servo myservo02: Servo myservo03: int pos = 0;    // variable to store the servo position void setup() {   myservo1.attach(9);  // attaches the servo on pin 9   myservo2.attach(8);   myservo3.attach(7); } void loop() {   for(pos = 0; pos <= 180; pos += 1)     // goes from 0 degrees to 180 degrees   {                                                                 // in steps of 1 degree     myservo01.write(pos);                      // tell servo to go to position 'pos'     delay(15);                                             // waits 15ms for the servo     myservo02.write(pos);     delay(15);     myservo03.write(pos);     delay(15);           }   for(pos = 180; pos>=0; pos-=1)     // goes from 180 degrees to 0 degrees   {                                    myservo01.write(pos);            // tell servo to go to position 'pos'     delay(15);                              // waits 15ms for the servo     myservo02.write(pos);                  delay(15);     myservo03.write(pos);                   delay(15);   } }

Topic by Casual_Engi   |  last reply


Wind Generator

Hello Guys, I am working on a small project that involves wind energy, I am basically looking for a generator, preferably DC and as small as possible, my goal is to generate at least 17V and between 1.5 and 2A.  Does anyone know where I can find something like this? Thank you Alejandro Moncada

Topic by AlejandroM5   |  last reply


Reviews : Motherboard Clock- Night Dim Arc Light !

Hi, Please refer to https://www.instructables.com/id/Motherboard-Clock-Cum-Night-Dim-Arc-Light-/ These are created using old computer and mobile phone parts. Please do feel free to express any types tips  or suggestion you  would  like to give. Thanks, Richi

Topic by RichiV 


multiple arduinos in a network (mesh), with each possibly being both host and client.

Hello there, I am trying to put together a mesh topology of arduinos. I have never used them interconnected and now I am hoping to be able to put them together in a way that they may power up and communicate when plugged to one another. so I need them to receive both power and data connection from the one previously connected. for that, i think i need each one of them to be able to act as both host and client. am I correct? would anyone know more, and willing to help? I very much appreciate any feedback. Thank you, Karim.

Topic by karimskarim   |  last reply


Small Voltage Regulator

I am looking to buy or build a small voltage regulator that can fit in an O gauge electric train engine. It needs to have a 18-20 volt AC input and 10-12 Volt AC 1 amp output. I would like to buy one already built, buy a schematic or a schematic with the parts to build. Thank You

Topic by frankv6   |  last reply


BLE Transmitter+Receiver child locator?

Hi, I'm not sure where to start, my understanding of the components and tech are minimal at best. I know what I want to achieve and I believe it is a possible project. I'm looking for any advice even if it exists outside of my current knowledge. Essentially the idea is similar to this "lost child locator" product-  http://tinyurl.com/pd8goy7 or these t-shirts- http://tinyurl.com/mkm5b8k What I'm struggling with is how to carry out the concept without involving a smart phone. I'm looking for a larger range than 15M, multiple devices to respond to one-another, and for the watch to act as both transmitter and receiver. A simple LED indication is sufficient, no sound or vibration are necessary. I think BLE is the proper signal to work with but I don't want to involve smart phones at all. Compactness is a major plus, but ultimately I would settle for a mint tin or puck sized device. Everything would need to run on a small battery as well. The practical application of this project is for times when you're in a large crowd and you are looking for your group. If you had a watch tuned to your group, you could more easily track each other down if you knew someone was close. 

Topic by minion-chan   |  last reply


Charger circuit

Hey there, I'm planning to build a portable stereo speaker box thingy (you know what I mean). In order to power the 2x10W amplifier I want to use a 7.2V 1400mAh battery pack from an old RC car. As the housing of the box will be sealed I want to implement a mechanism to charge the pack. For this I wanted to achieve 3 things: -If the Power-Switch is turned on, the amp should be powered from the power line -If the Charge-Switch is turned on, the battery pack should be charged -If both of the switches are turned on, the amp should receive power from the power line while the battery pack is being charged. I have thought of the following cabling (see attached picture for a schematic) The blue box is the amplifier, the green box the battery pack and the orange connectors are tamiya connectors (the ones for RC cars) The first switch (marked in green) is a normal DPST switch which establishes the connection with the power line as well as the connection with the battery The second switch is a SPDT switch and activates either the connection between the battery and the amp or the connection between the power line and the battery. Will this work the way I think it will or does this configuration any faults? If the latter, what can I do I have to change? I'm actually really new to electronics, this if my first project so forgive me, if this setup is actually BS Cheers and sorry for the long post ^^'

Topic by Felixkeeg   |  last reply


How to make files for laser cutting?

I have some psd files of some animals I'd like to make some acrylic lasercut figures out of. One layer for just the outline, and another layer for engraving details. I have no idea what files a lasercutter needs to be able to make these. I brought my psd files to one of the workshops where I work, but was told to email my files to this guy who could make them into vector. Unfortunately he only did one of the files (out of five), so I figured I might be able to just figure out how to make the rest myself, but I'm really confused how this works. He sent me two files, a pdf and a ai. I really only know Photoshop, and my experience with Illustrator is very limited (next to none). And I know nothing about pdf's. Is there any easy way to make whatever files a lasercutter needs, for a simple shape and a few engravings?

Topic by Mikki G.W   |  last reply


Connect a cordless phone to a computer and use over Skype/Google, etc

Has anyone come across a way to connect a cordless phone to your computer and use to talk over Skype, Google Talk, or similar?

Topic by awascholl   |  last reply


problem with pot and usb gamepad

Hi, i try to attach a pot to a analog usb gamepad  in order to build a diy steering wheel for pc when i enter to joystick propriété i get an unstable value of axis like the curseur is floating  what should i do??

Topic by lamineovich   |  last reply


Instructable Filing System

Dear Fellow Forum Readers, A while ago, I posted an idea/request asking about the possibility of making the names of Instructable  PDF files conform to a certain standard for ease of filing. I found my own best solution. If anyone can use this idea, please do! What this project does is to add symbols to the titles of instructables which indicate awards and featured status for each downloaded Instructable. I am using a Mac and purchased the app "A Better Finder Rename 9". Within a parent folder entitled 'Instructables Downloads' I created a group of folders with the symbols corresponding to the featured/awards symbols of the given Instructables. For example, if there is one star for an Instructable, I designate that this way: (*). If there is a star and a goblet, it is designated like this: (*+). I make a folder for each of the combinations of stars and goblets and then as I download (I download many at a time) I just save them to these folders. Then afterwards, I use "A Better Finder Rename" to add the designations as a suffix to the Instructable titles. When I want to quickly pick out the most awarded Instructable out of several options for a given project, I can see right away which one is most recognized as excellent. Finally, I made a master Instructables folder with broad catagories within which to sort my downloads, e.g. Electronics & Computer Instructables, Maker & Prototyping Instructables, Gardening & Homesteading Instructables, etc. Now I have a nice library for portability and offline use! Will many people want this? I doubt it. But it makes my substantial collection easy to go through and saves time when I want to look for recognized excellence among many choices of projects. Besides, it's fun and 'therapeutic' for me to idly sort, rename and file these great projects on a lazy afternoon (not enough of those!). Helps me mull what I'll work on next, too. :-) TN

Topic by timnugent   |  last reply


Help making an LED lamp

Alright, I want to make an LED grow light for my plants because the window I want to put them in doesn't get enough sun. I need quite a bit of light for this application and it will have to be on for a significant part of every day so LED is a must. I've been looking at the prices and it seems like the most economical option is to buy some LEDs off ebay, buy a driver... maybe some resistors... then mock up some kind of heat sink to connect them to. I was considering about 10-20 ten watt on chip LEDs. This light is going to be in a room I'm in a lot so I don't want to go with any funky colors. I'd like to just use daylight spectrum LEDs. Something around 6500k. Anyway, I'm thinking it makes the most sense to get one big driver to run all the LEDs rather than one driver for each. That just seems cheaper and frankly more interesting. But I need help understanding how to wire the whole thing together and understanding whether I need resistors etc. So I'm looking for some general help figuring out what to buy and then how to wire it all together. Thanks :)

Topic by WillE2   |  last reply