MP3 + Speak alternative power supply???

I have posted this this in 'Kids' forum also, I hope that is ok? MP3 Bedtime Stories ..... Battery  Hi, new here so please bare with me.....long story cut short. My Grandson is five years old and I thought it would be great, and get him to sleep quicker at night, if I could come up with some method of playing MP3 stories. I know, CD player, etc. nope, at five years old they want to take EVERYTHING apart. So no mains leads, CDs, etc. What I came up with was buy a simple and cheap (£2.99) MP3 player off ebay, pair it with a small battery powered speaker (£5.99) and away we go.....doh!   Both items are amazing and just right for the job BUT both are battery powered (will go flat after he falls asleep and they are left on) and two, they both have on-off switches underneath which stops me mounting them on a surface. Sorry this is going on so long....... What I thought of doing is getting a loooooooong lasting battery source (would 9v last a lot longer) and bringing ing it down to 1.5v (x2 one feed for each device). Then it wouldn't matter if they were left on overnight a few times -  or am I deluded.  Or better still, can anybody please advise? Both the speaker and MP3 player have internal rechargeable batteries but they rely on a VERY busy mum recharging them daily so I am looking for an alternative. thanks

Topic by TN1946   |  last reply

Can I use this battery at the same time when charging?

Hi, I couldn't find the answer anywhere so i'm gonna ask - is this battery usable while charging at the same time?;=top&ttype;=price&talgo;=undefined I'm thinking about using this battery on my portable speaker with Lepai 2020A+ amp ..

Topic by Wauchy   |  last reply

arduino Blimp

Hey guys. I'm building an RC Blimp right now and i want to add an autonom landing feature which means the blimb has to realise when there is no more serial communication through the xbee. right now the aircraft gets 3 char-type objects. ech of these 3, for example "1=#" represents the speed for one motor. the 3 ASCII symbols get send every 0.1 seconds. any ideas how the arduino can realise that the connection is interrupted?  heres my code, thanks for helping me out:) #include #include "Wire.h" #include "SRF02.h" /*Testprogramm zur Treiberprogrammierung Team Grün*/ SRF02 srf02[2] = {   SRF02(0x70, SRF02_CENTIMETERS), //Initialisierung der beiden Ultraschallsensoren   SRF02(0x71, SRF02_CENTIMETERS), }; unsigned long nextPrint = 0; //------------------------------------------+ Servo servoLeft; // create servo object     | Servo servoRight;//                         | Servo servoYaxis;//                         | //------------------------------------------+ int motorSpeed; int verticalSpeed; int pinGreen = 8; //rgb colors int pinRed = 4; int pinBlue = 7; int ledPin = 2; int signal = 0; void setup() {   //--------------------------+   Serial.begin(9600);//     | Serial   Wire.begin();//           | Ultraschallsensor   SRF02::setInterval(100);//| Pulsintervall   //-------------------------+   //Servo Liste   servoLeft.attach(6);   servoRight.attach(5);   servoYaxis.attach(9);   char str[4] = {     '\0'  };   char command[3];   int a;   pinMode(pinGreen, OUTPUT);   pinMode(pinRed, OUTPUT);   pinMode(pinBlue, OUTPUT);   pinMode(ledPin, OUTPUT); } void loop() {   char str[4] = {     '\0'  };   int a;   int j = 0;   int mL, mR, mY;   if (Serial.available()>=3){     for (byte i=0; i<3; i++){       a =;       if (j == 0){         mL = a;       }       if (j == 1){         mR = a;       }       if (j == 2){         mY = a;       }       j++;     }     if(mL == 181){       Serial.println("Recived Command:");     }     else{       Serial.println();       Serial.println("MotorValues:");       Serial.println(mL);       Serial.println(mR);       Serial.println(mY);       Serial.println("------------");       servoLeft.write(mL);       servoRight.write(mR);       servoYaxis.write(mY);       //---------------------------------_-:+*COLOR*+:-_-------------------------------       if(mL==90&&mR;==90&&mY;==90){         //show zeropoint         digitalWrite(pinBlue, LOW);         digitalWrite(pinRed, LOW);         digitalWrite(pinGreen, LOW);       }       if(mL         digitalWrite(pinBlue, LOW);         digitalWrite(pinRed, HIGH);         digitalWrite(pinGreen, HIGH);         }       if(mL>mR){         digitalWrite(pinGreen, LOW);         digitalWrite(pinRed, HIGH);         digitalWrite(pinBlue, HIGH);         }       if(mL==mR&&mL;!=90){         digitalWrite(pinBlue, HIGH);         digitalWrite(pinRed, LOW);         digitalWrite(pinGreen, LOW);       }       if(mY!=90){         digitalWrite(pinBlue, LOW);         digitalWrite(pinRed, LOW);         digitalWrite(pinGreen, HIGH);       }                 }   } }

Topic by willi1131   |  last reply

need help newbi

Ok guy's i need a little help, or to be pointed in the right direction, backround: i want to buildd a retrofit kit for a existing automatic sandblast curtain.. reason: basically every monument company in the country own's an older automatic blast curtain, that is controlled by limit switches only, and the new ones are cnc and cost 50,000 ish, and the existing machines are screeming for a retrofit kit... i own the "hirons model j" automatic curtain, it an x,y easy as pie thing, my problem is that i can get the parts machined and the rig built, however the g-code is my problem, and i think it will be very easy for someone whom can do it, to do it.. all i need is the machine to make strait passes left to right and back while slowly progressing top to bottom and back, the nozzle will also have a "spindle" motor, that will make it make a circular pattern constantly for the duration of the job, could anyone help with the g-code, ????    i can do all testing as i own the machine,

Topic by ryanH88 

Nexus 7 (2013, Gen2, FLO) - internal micro SD mod

With games getting bigger and bigger with every new release and limited storage capacity some of you might think the same: Why not add a SD card to my Nexus 7? The lates Lollipop update basically killed the normal USB OTG funstions, so if you do want to use a USB stick or external SD card in a reader you will need a powered USB OTG cable. I am not sure if this was intentionally or another bug but it is damn annoying. After openeing my tablet to check m options I realised my main problem is space. Even adding a micro SD with a similar small reader is a major pain as there simply is no empty space left inside. So I was hoping someone here might be interested in such a mod and contribute with good ideas during the build and maybe even copy the mod (if I manage it) to confirm it is in fact doable. My findings so far: A custom rom is a must have due to the OTG limits of the original. It might be enough to just find a suitable kernel but so far I settled for the Team UB Lollipop release. It offers some mods based on Cyanogen and claims full OTG support. Other roms also added support for external WiFi and TV dongles, so there is room to play. As said space is a problem I am working on ;) For an internal mod and due to the lack of physical support on the mainboard the only option is to use the standrad USB port for this mod. This means SD, reader and OTG mod must fit inside somehow. It also means some sort of physical switch is required for the times when you need full power during the recharge - although I have to test if this still works with an external SD while the tablet is switched off. In that case I could accept 500mA charge during normal use and 1A or more when the tablet is switched off. The rom should support fast USB charge but I am not sure if this olaso works in host mode. It is possible to use some extra app and scripts to make good use of such a mod. Not only can you use the SD for music, movies and other demanding files but with scripting you can also move the big data files from games to the external storage. Works similar to the apps you can get for devices with a real SD card, where you often find the "Move to SD" option in the app manager. This mod will not be for the faint hearted as it requires serious soldering skills on these tiny components, so if you only know how to solder copper pipes you might need some training on old electronics first ;) Let me know what you think and if you would be interested in such a mod as otherwise I won't bother taking pics during the progress. And without pics there will be no Instructable follwing ;)

Topic by Downunder35m   |  last reply

dgl-wh070l-12a lcd pin out

I have this lcd from a portable DVD player, I want to use it for my raspberry pi, I want know pin out, it has 2sets of pins, 1set has 4 pins out of which two are for backlight, 2nd set has 14 pins how ever last pin is nt used

Topic by Pranay ReddyK   |  last reply

trigger signal for video line

Hi, I'm having a project which need to send trigger signal to oscilloscope. i should make a circuit that will allow me to trigger oscilloscope on specific lines in a video signal. Please give me some idea so i can go ahead. thanks in advance

Topic by sofia14 

Circuit Scribe Educational Project: Prototyping Board

The Eureka Factory does a lot of hands on educational programming with youth and adults, often library staff training for makerspace development and creative programming.  We test drove the Circuit Scribe kits provided for the February Build Night, at the Land O'Lakes Branch Library in Pasco County, FL, and our Maker in Residence, Chuck Stephens shares one of our projects and a kit review here: We'd love to hear some of your educational projects with the kits.

Topic by EurekaFactory 

I want to make a sensor which can detect the dingo trap movement

Hi guys, I want to make a sensor which can detect the dingo trap movement as I want to know if any dingo is trapped or not. I want it connect it with a dragino MS14( in 14 positions screw terminal). I have many traps in my farm and my part is to make a sensor and find a way to connect it with dragino MS14 14 positions screw terminal. Else will be handled by my fellow participants in the project.  Does anyone have a any kind of knowledge about it?

Topic by ramn0004   |  last reply

how to build an inverter

I want to know how to build an inverter upto 5kva

Topic by segge   |  last reply

SCR latching circuits and LEDs

LEDs and I just can get along...In another project I had a solenoid blowing out LEDs. Now this: I have a number of switches hooked up so they trigger an SCR latching circuit to turn on (and keep on) some LEDs. The SCRs are wired in parallel to each other and have a 1K resistor on the gate. Power is applied to the whole circuit via a timer relay (not hooked to the SCRs). The power is a 12v, 200mA wall wart. And the SCRs I'm using are NTE 5465. The LEDs last a while but burn out or go to a weird blinking state (when the switch is depressed) after about 2-3 days. In my previous project I needed a diode to help with the solenoid voltage spike. But I don't think that it is the case for this project since the SCRs aren't inductive. Do LEDs connected to the switch part of a relay need a diode too? The LED package I'm using is purchased from Happ Controls (see hideous grainy picture). It's rated for 12V but they can't give me a mA rating on them. But they say that no inline resistor is required. Any thoughts? I think this is another case of my inexperience causing me to overlook the obvious.

Topic by robotninjasquid   |  last reply

Rotary switch w/ direction based contacts??

I'm looking for a specific type of switch... I believe that it must exist, but I have never seen it... I need a rotary switch, where each clockwise "click" (partial turn) makes one circuit momentarily, and each counter-clockwise turn makes a different momentary conection... example with two light bulbs ( L1 and L2 ) connected to each direction of travel, respectively: If you rotate the knob one "click" (say 15 degrees) clockwise, L1 flashes for a moment, as the knob is in motion. if you continue clockwise, L1 will flash at each "click". If you rotate the knob one "click" counter-clockwise, L2 flashes for a moment. if you continue counter-clockwise, L2 will flash at each "click". There is no center-point, so any clockwise travel corresponds to L1, and any counter-clockwise travel corresponds to L2. does anyone know where I could get a couple of these??

Topic by gschoppe   |  last reply

The Reactable - A collaborative electronic music instrument

I was watching current earlier on and found this pod:The reactable is a collaborative electronic music instrument with a tabletop tangible multi-touch interface. Several simultaneous performers share complete control over the instrument by moving and rotating physical objects on a luminous round table surface. By moving and relating these objects, representing components of a classic modular synthesizer, users can create complex and dynamic sonic topologies, with generators, filters and modulators, in a kind of tangible modular synthesizer or graspable flow-controlled programming language.The video won't embed, but it's pretty awesome: Current PodThe project's official website is here.The software is open source, although I can't see many details of the hardware.

Topic by whatsisface   |  last reply

Need Data Sheet for old diode laser. RCA SG2001

I have been digging though my assortment of electronic components, stuff that has gathered dust for years.  One item I came across still new in the original package is a laser diode.  RCA # SG 2001.  I have tried searching internet with out much luck other than a PDF about how to drive the diode.  ( short pulses high current ) I see the same part number referenced for other products.  I did find it listed but there is no data showing that I can find. is over 30 years old !  No reason not to know what it is or what it could be used for, perhaps for the pocket engraver? Would much appreciate any information anyone may have about this chip.  I believe it is fairly high power IR diode.   It is stud mount with a single lead exiting the center of the stud bolt.  A bit less than 1/4" dia case.

Topic by stuffdone   |  last reply

Type of diode

Hey everyone, I recently had an ASUS laptop to repair and after troubleshooting, found some damaged components among which is this surface mount diode (kindly see picture). I looked around for a datasheet but cannot find anything. Am also unable to find out exactly what type of diode it is from its code marking. I've had results varying from a 'leakage diode' to '3.3V zener diode'. However, I am suspecting it might be a schottky diode since it was in what looks like a boost circuit. Any help would be greatly appreciated. Code marking: 100 98FP1  j Thanking everyone in anticipation. Kind Regards, Nawaz

Topic by Nawaz   |  last reply

How can I turn pnuematic muscles into hydraulic muscles?

Hi everyone, thanks for taking the time to read this Recently I've become interested in these pnuematic muscles:!/ I wondered if it would be possible, and what sort of pump I'd have to use. I wanted to make the pump fill the muscles as fast as they can, and I wanted it to be fairly portable (running off 12 volts or something).  Thanks for your answers!

Topic by WarrenP2   |  last reply

Wanting to make a switchable IR night light

Every night I come home, I have to open my garage door manually and park my motorcycle. When the garage closes, its dark and I tend to bump into my cycles exhaust burning myself. Yeah pretty funny. Anyways I had an idea, since I already had an arduino uno board and an IR Sensor and emitter, I wanted to make a trigger-able light switch. But I wanted my IR reader to run on AC, like a night light. At the press of a button from my emitter, the IR would pick up the codes and my light would turn on. Is this possible? Some people say, just buy a motion sensor and plug it in, I say i'll just salvage it for parts and try to make my own. Whats the fun in buying it, when I could build it with parts I already have. I mean, I know AC is dangerous, if not viable, then I could resort to a 9v with a power capacitor so long as it doesn't drain my 9v instantly.

Topic by bprins   |  last reply

Android 4.4.2

Alrighty folks, its been a while since i've been in the instructables community.... I apologize for my absence. Anyways, on to my question. My mother and I both have Samsung Galaxy s3s with android 4.4.2, and I am able to set a new lock pin, change lock type, or even disable mine. She, however, cannot do so on her phone. I've looked myself, and it seems all other options for the lock screen are "grayed out" and unable to be selected. All we want to do is disable the lock screen on her phone. Anybody know why this is happening or what I can do to help her out?

Topic by dkop1   |  last reply

RFID tag ideas

I've got a handful of RI-TRP-DR2B 32-mm Glass Transponders...Don't really know what to do with them so I figured I'd ask around here.  I've attached a picture and the data sheet for this item.  Has anyone worked with these or similar devices before?  Also, any recommendations for a reader/writer (preferably something that'd work with a Raspberry Pi or Arduino)?  They operate on 134.2 kHz. Thank you.

Topic by XyzzyYYZ 

Positive affirmation box

I am trying to make a positive affirmation machine so that when my students turn in homework it will either give an audio message or display a message that says something good.  I know I need to build an optical sensor but I was wondering if there is a build that you can suggest that I can modify?  I have moderate skills with building electronics and access to plenty of materials but I am lost as to how to start.

Topic by Mr.E1   |  last reply

How to use a 3DS screen

Hi everyone! I have a spare  working 3DS screen (a friend of mine thought that her screen was broken, so she ordered a new one, and it turns out the problem wasn't solved so it didn't came from the screen, and she told me I could keep it if I wanted to). I'd like to know how I could use it in various projects, for debugging or for a more long term use. I don't need 3D (anyway I assume this wouldn't be possible unless I write a driver). Is it possible to add a VGA port? A HDMI or USB (I don't think that USB screens exists, but hey, we're on Instructables, everything is possible here ^^) Thanks for your help Please keep in mind that my knowledge in Electronics is not huge, as I study it for only two years in college, and now I only study Computer Technology. And also note that I'm French, I know my English speaking isn't perfect, so feel free to ask me to clarify any point that is not correct in your language

Topic by PepperBoy 

Barcode in Word after upgrading

I'm used to make 2D barcode in Word 2003, it was simple to use and worked very well. Now, I upgrade ma word to 2007, I'm wondering can I use the same add-in in Word 2007? Or should I get a new one? If I upgrade to 2010 later, is there any possibility that the same add-in will work well without any upgrading?

Topic by bessbutler376   |  last reply

Automated Delivery Gate Image Capture

Hi everyone, I wanted to see if you guys can give me some advice or point me in the right direction (preferably towards an instructable) to achive my goal.  I am trying to improve upon an access gate. Currently It just opens with a remote controller. The improvements I want to implement are the following: 1. Place cameras to automatically take pictures of the vehicle as soon as it arrives from all angels     I was thinking maybe with an IR sensor of some sort 2. send those images to an email or to a database. 3. have the driver be able to scan documents and upload them to the database or send to an email, and be alerted when they have done so.  I want something like they have at the border checkpoints with those cameras, and also with the document upload. Any feedback is welcome. thank you!    

Topic by glomb   |  last reply

Arduino code help

Hey guys first post.  I need some help with some code Im working on. What I want to do is have a pot controlled timer that moves a servo after a time dictated by the pot. The scale of delays I want is 0-3 minutes.  I eventually want to program an Attiny85 chip to do this. For now Im substituting a led in for the servo. Im a newbie with Arduino so any help with this simple project would be greatly appreciated. This is my code:  int sensorPin = 0;    // select the input pin for the potentiometer int ledPin = 13;      // select the pin for the LED int sensorValue = 0;  // variable to store the value coming from the sensor void setup() {     pinMode(ledPin, OUTPUT);    int val = analogRead(0);     val = map(val, 0, 1023, 0, 30000);       digitalWrite(ledPin, HIGH);       delay(val); delay(val); delay(val); delay(val); delay(val); delay(val);           digitalWrite(ledPin, LOW);                         } void loop() {                   }

Topic by Steven Wrigley   |  last reply

Ultimate Pi Home Server

I'm new to linux and following through the instructables  for Pi home server. Everything is fine until I try to login to Webmin via ssh from windows 7 PC with `putty` using IP:12321 This lets me login to root @core but can't get the Webmin login screen. Any help much appreciated

Topic by Crocker7   |  last reply

about button....

I have code on that will turn on led on my arduino but how can i turn it if i want to add button? how can i add button here in my code? #include int ledPin = 13; int buttonPin = 2;  // the number of the pushbutton pin      // the number of the LED pin int buttonState = 0;  // variables will change: LiquidCrystal lcd(12, 11, 5, 4, 3, 2); void setup() {   Serial.begin(9600); // set serial speed   pinMode(ledPin, OUTPUT); // set LED as output   digitalWrite(ledPin, LOW); //turn off LED      //   //         lcd.begin(16, 2);           lcd.setCursor(0,0);         lcd.print("     DaNeiL");          lcd.setCursor(0,1);         lcd.print("GASOLINE-STATION"); } void loop(){   while (Serial.available() == 0); // do nothing if nothing sent   int val = - '0'; // deduct ascii value of '0' to find numeric value of sent number     int buttonstate =;       buttonState = digitalRead(buttonPin);   if (buttonState == HIGH) {         digitalWrite(ledPin, HIGH);     Serial.println("PLEASE WAIT WHILE REFUELING"); Serial.print('\n');     delay(9000); digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW     Serial.println("price 40");     Serial.print('\n');     Serial.print('\n');     Serial.println("liters 1");     }   else     // turn LED off:   if (val == 1) { // test for command 1 then turn on LED     Serial.println("P20.00                    1/2");     delay(10);     digitalWrite(ledPin, HIGH);// turn on LED      lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P20.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=500");         }         {     Serial.println("P40.00                      1");     delay(10);     digitalWrite(ledPin, HIGH); // turn off LED      lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P40.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=1000");       }   if (val == 3) { // test for command 1 then turn on LED     Serial.println("P80.00                      2");     delay(1000);     digitalWrite(ledPin, HIGH);// turn on LED      lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P80.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=2000");       }   else if (val == 4) // test for command 0 then turn off LED   {     Serial.println("P120.00                      3");     delay(1000);     digitalWrite(ledPin, HIGH); // turn off LED      lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P120.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=3000");       }       if (val == 5) { // test for command 1 then turn on LED       Serial.println("P160.00                      4 ");       delay(10);       digitalWrite(ledPin, HIGH);// turn on LED        lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P160.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=4000");         }     else if (val == 6) // test for command 0 then turn off LED     {       Serial.println("P200.00                      5");       delay(10);       digitalWrite(ledPin, HIGH); // turn off LED        lcd.clear();      lcd.setCursor(0,0);      lcd.print("PRICE=  P200.00");      lcd.setCursor(0,1);      lcd.print("MILLILITERS=5000");         }       if (val == 8) { // test for command 1 then turn on LED     delay(10);     digitalWrite(ledPin, LOW);// turn on LED     lcd.clear();      lcd.print("     DaNeiL");          lcd.setCursor(0,1);         lcd.print("GASOLINE-STATION");       }           if (val == 9) { // test for command 1 then turn on LED     delay(10);     digitalWrite(ledPin, HIGH);// turn on LED     lcd.clear();      lcd.print("    FULL TANK");      lcd.setCursor(0,1);      lcd.print("PLEASE WAIT....");       }            if (val == 0) { // test for command 1 then turn on LED     delay(10);     digitalWrite(ledPin, LOW);// turn on LED                }   else if (val == 12) // test for command 0 then turn off LED   {     delay(10);     digitalWrite(ledPin, HIGH); // turn off LED           }   else {     }     }

Topic by NeilV2   |  last reply

DC Motor speed controler

Hi all Can anyone suggest the best way to replace the variable speed trigger of a 18v battery drill, with a remote from the drill adjustable speed control. I want to control the speed and have it stay at the setting until I turn it off or adjust the speed. The drill will be clamped to a board with no battery and powered by a power supply. Thanks for any advice Les

Topic by Les1951   |  last reply

Door's spy hole turn digital using an old camera

Hi, i have an obsolete digital camera 20 yo. and i was thinking to use it to replace my door's eye with a lcd display The old camera has all is needed: lens with cmos sensor to fit on the outside of the door and lcd display (a small one in my old camera) to fit on the inside; i haven't disassembled the camera yet and i am not sure about the diameter of the lens and cmos sensor; of course i do not want to drilll a bigger hole in my expensive door! do you have any exprerience? Regarding power supply, my camera use 4 AA batteries but i could replace them with a 18650 battery and a small step up converter

Topic by m_a_x   |  last reply

Laser or LED go go dancing Cage

Hi There, Im tryin to build a laser go go dancing cage for a big theatre production. Iv done basic wiring of LED's but never worked with lasers before. After  lot of scanning the net it seems it might be easiest to just buy a bulk load of laser pointers off aliexpress (or somewhere else?) and try to wire them into a circuit so i can turn them all on at the same time. I want the effect of the bars of light as seen in the pics below. I have been asking around with electricians and they don't seem to either want or know how to help me.... I would LOVE any help or direction anyone can give me!!! if anyone can help answer any of the following questions id GREATLY appreciate it! 1. from what iv read it seems 5mW might be best for this purpose as more powerful lasers may burn the skin (i definitely don't want to be responsible for burning the building down!) Does anyone have any thoughts on what mW i should be using for this? 2. Ideally i would like the laser cage to be able to be seen without the use of a fog machine (i will use this for effect in certain parts of the show- but would like it to still be visible when its not there) Is this possible, or would i need a stronger laser that would be too dangerous? 3. i don't really know anything about calculating the voltage or what power battery i would need once i had say 50 lasers together in a circuit. Does anyone have any links for working this out? I'm not sure if it is specific or different for lasers? 4. I read that i would need a driver, is that true? any links for that would be great! 5. are there insanely high powered LED's that could have a strong focussed beam that would be better/easier to use and i should forget about lasers all together? 6. do you have a totally different idea of how i should go about this that would be a lot easier?? Thanks!!! Andea Darling ****it won't seem to upload the reference pics so heres a couple of links to give you the idea -

Topic by dieselkannon   |  last reply

help, my brain hurts reading tech forums

I'm sure this isn't hard for ya all tech folk, and I'm hoping someone could point me to instructables that I could combine to make this....Any help would be appreciated when as clueless as I am, I'm not even sure the words to use to search. I would like a light box indicator with say 12 selections (colored led lights) to be able to randomize, but then to also have parameters of length for each different light.  So that some might have a range of 30-90 seconds and others length of 2-10 minutes before the next random selection.  Thank you.

Topic by genuineimpulse   |  last reply

Can you give me a project that use A29040-90pc

I find this IC when I'm finding a tact switch from a scarp. I get this from a old cd /vcd player. Can you give me the use of thing and a project. ☺☺☺☺ Thanks In Advance Have a nice ☺☺☺ God Bless Sorry for my bad English

Topic by RYM3U4JTJDFKZXHPLZTKAR   |  last reply

Electronics: increase trigger signal length for USB gamepad

This is related to my last Instructable. Sometimes when I install the track piece I am using on a fast straight I am missing laps. The problem could be USB polling rates in Windows 8. I found no way to increase polling rates to 500 or 1000Hz instead of the aprox. 180Hz. First I don't know if the car triggers at all when I go over the contact very fast or if the USB polling is the problem. i can try to wire a LED in and see if it is flashing up when the counter is not working. My thought is that I could increase the signal length when the car triggers the button. Any ideas how this could be done? My second problem is related. I also got a IR-gap-sensor. I understand that I need some kind of relais to make it trigger my USB gamepad buttons? Please help an electronically uneducated guy! I have the feeling that the answers to my questions are probably not that hard anyways.

Topic by heavyweather   |  last reply

Need help to select stepper motor and dedicated controller.

Hello, I'm a new member of this forum. I want to learn stepper motor controlling, so please help me to select a stepper motor and a dedicated controller for this motor. It'll be better to understand easily, if i get a sample project. Waiting for your prompt reply!

Topic by joy59   |  last reply

What can I do to rescue my deleted drive files?

Hey, guys! I need your help to rescue my deleted drive files. From last week, to prepare a job presentation, I had searched and made many related files and photos on my USB external hard drive. However, yesterday, this external hard drive was formatted and all my files seemed to be deleted completely. But, there was no time for me to make these files and stuffs again one by one. Do you have any idea for me to take them all back directly from this hard drive? In fact, from the internet, I know there is data recovery software that can help me out. But, I don’t know whether they can work on my drive and copy my stuffs back successfully. I don’t want to lose anyone of them. Can you help me?

Topic by Caylalon0er   |  last reply

Any ways to block the EM waves from my solid state Tesla coil?

Hi guys, I'm working on a small solid state Tesla coil (Slayer exciter) and every time I test it, the internet router stops working and peoples don't really appreciate it when it happens. The router is about 25-40 feet away but my brother's computer is in the same room about 10 feet away but is connected with an Ethernet cable that might act as an antenna? I know that all the touch lamps in the house goes crazy so I really need to find a way to stop the EM waves to interfere with the electronics in the house. I thought about putting the coil in a earth grounded metal cage but have no idea if it would work and if there is any other ways to do it. Any help?

Topic by Electrospark   |  last reply

30 minute DIY AM particle-acceleration

Last fall, I verified an initial relationship of resonance between two bifilar wound wires (of any length). The predictable sequence resonates at the following levels - 20 Hz, 30 Hz, 50 Hz (and all multiples of these 3 frequencies). I used a Parallax Propeller Board - with PGEN 2.0 software from Innovationshop in Germany.   This software allows for a waveform built of 32 stacked frequencies to be created and amplified.   I have used it to successfully break the bonds of distilled water - as one of my earlier videos shows 2 years ago. JL Naudin calls it a "GEGENE machine" - but it is a simple, tabletop, particle accelerator.  His results can be found here::: One of my earlier videos from May 2013 - can be found at YouTube - I just want to show people how this works.  It is a 4 minute explanation of open-sourced Patent 512,340.::: The materials:: 1 - 1800 watt induction cooktop (iron, copper, or 3-ply stainless cookware is required on these types of devices) 2.  50 feet of 14 AWG speaker wire 3.  2-10 count of 500-watt halogen lightbulbs. 4.  wire, solder & connectors for the wire-ends. 5.  1 stainless-steel HHO DC electrolyzer tank.  6.  Cooking Pan - or light fixture (to hold light bulbs). 7.  High Voltage diodes (500 Volts or higher)

Topic by jabel4   |  last reply

Need help with DS18B20 1-wire thermometer IC

So I recently bought a DS18B20 1-wire digital thermometer IC to use with an arduino.  But when I hooked it up, I couldn't get any reading at all out of it.  I have the VDD pin wired to 5v on the arduino, the gnd wired to gnd, and the data pin wired to analog pin 0.  Any help would be awesome.

Topic by dudes   |  last reply

Help finding lost transponders that transmit at 433.92 MHz and receive either at 307

Hello, I'd like to know if there is a tool finding a small tag transponders that transmit at 433.92 MHz and receive either at 307 kHz? We have a pocket tag reader but it is only good when the tag is within 12inch distance. We have an idea where the tag maybe but finding it is another thing. is there a tool to maybe triangulate the signal and locate that tag that is missing? Thank you for your help!

Topic by batman000   |  last reply

Help modify the maximum rotation for my steering wheel.

Hi everyone, i have a steering wheel from trust , i dont know the details. so, i attached a photo to understand better what i`m talking about. i play racing games, and i need a maximum rotation, i installed the drivers for it, so when i am in aprox 45 degree rotation it show and he behave like i`m in the maximum rotation. The maximum rotation is aprox 135 degree, so its a difference between them. i opened him, because i finished an tehnical university with a electromechanical profile, and try to modify the potentiometer that handle the rotation. i tried to put a smaller one, a bigger one, even try the fine course like its called, but nothing, i attached a photo of it two, maybe i forgot something. If anyone think or have an idea what to try , please help, because i have no other idea.

Topic by danyelo   |  last reply

Tiny 12v motor burns out a transformer. Why?

I connected a tiny little motor (12 volts, 60 milliamps) to a 12 volt, 1000 milliamp wall wart transformer.  The motor turned (no load), but when I disconnected it after not more than 10 seconds, I noticed a burnt smell and the transformer no longer has any output.  What happened?  Bad luck, or is there something about a motor's inductive load that would be incompatible with that kind of transformer?

Topic by walter.warren1   |  last reply

Making a Laser Cutter, but I need some help!

If there is one thing I do enjoy about making stuff, its when im making it out of cardboard. I wanna make better stuff out of this material, but my patience and skill with an Exact-o knife tend to lack or screw up when im trying to get dead on accurate cuts with large sections of cardboard. So if i'm gonna make some really good stuff i can be more than proud of, I figure i'll need a laser cutter. Ultimately I'm  wanting to build a laser cutter that can: -cut paper, cardstock, cardboard, and fabric without setting it on fire -about a 2 foot square or 2*3 foot rectangular cutting bed -parts that won't cost me more than $100 each i know its possible to build a laser cutter with DVD/CD parts, amongst other things. And i do have one Raspberry Pi Model B board, 1 Arduino Uno and Mega boards, along with 1 Seeeduino: Motor, Relay, Ethernet, TFT Touch, and SD Card Shields. I'm still waiting for my Arduberry to come in the mail, but that's all the major components I have. I do have the necessary tools, soldering and desoldering irons, and a multimeter. Now all i need are the parts and programming skills. I am more than willing to learn Arduino and/or Raspbian languages, and i have ways of getting the parts i'll need, but I have no idea where to begin on the CNC aspect. Can anyone recommend some good resources or parts for what i'm trying to build? I'm not asking for someone to build it for me, i'm just asking for some guidance on this project.

Topic by EngineerJakit   |  last reply

ECG circuit help

I have this circuit for recording 12-lead ecg in arduino. Whenever I record the augmented leads, especially aVR, its output graph is upright instead of the normal aVR which is downward. I also followed Wilson's Central Terminal but still the same. I am currently stuck with this and I need some help.

Topic by OppaC   |  last reply

HELP! I need an awnser for my project

Hello everybody, I would like to make a little divice that i could conect my telephone with true bleutooth and that at the other end of the divece there is a jackplug cable. If i plug that cable into a amplifier that it will play the music i send into the device. I tried to start this with my old bleutooth speaker. I took it apart and then conected the 2 cables that usally go to the speaker to a jack plug and plugged this one in my amplifier. And it workt only the music was really bad. so do i need to amplify this singnal or how could i solve this? the output to the speakers that go in to the jackplug are 3Watt. If i made it work im going to make a tutorial on it. Thank you, Mistercrazyboy21

Topic by Mistercrazyboy21.   |  last reply

80.000 nose dive autopiloted

Hi all, I'm planning to drop a glider from a weather balloon from about 80.000 feet. I want to let the airplane gain speed and then glide to the launching place or at least as close as possible to it. The idea is to do a nose dive (nose heavy) until enough speed is reached and slowly turn the airplane towards the launching site. Is this achievable with ardupilot software? I'm already sending a bunch of instruments like gyro, gps and magnetometer and I could use their readings on a Raspberry pi to run ardupilot , at least until video range is available to switch to manual. If possible I want to avoid buying the autopilot hardware 1. Any idea if this could be achievable the way I'm going about it? 2. Is this even legal? (I know it has been done already but I'm planning on doing this many times) Thank you in advance for any answer backed up by facts. 

Topic by Matienzo   |  last reply

Good Gauntlet Ideas

Hey guys! So, I've been going around, and trying to figure out exactly what my next project is going to be. I want to make a gauntlet. Whatever I make, it has to be a gauntlet of a sort. Preferably a cool tech idea, or a weapon, but any ideas help. I have an old strap made for an arm gauntlet. I didn't measure it, but it is roughly an inch and a half thick, possibly two. I have multiple altoids tins, a pair of busted headphones (everything but the auxiliary cord is there, but the wiring needs some tlc), a lot of small dc motors, rubber bands, some old cell phones, and some odds and ends. I prefer not to purchase anything if possible, just make it. As real as possible for any weapon ideas (like, if it is a launcher, it should penetrate a box, if not more). Thanks everyone!

Topic by awsomebrawler3   |  last reply

Battery charger IC

Looking for IC that charge Li ion batteries. can anyone point me in the right directions. Just wanting to know what kind of IC's by name

Topic by dominick.j.pezza   |  last reply

converting lighting fixture to portable battery operated

Ok I've done many searches but do to this being a bit unique I haven't found a solution thats spot on. So here's the story!  I found this cool bathroom, above the sink, multi bulb lighting fixture by the trash. (Oh like you don't shop the same places? He he) I really want steampunk looking lighting for a convention booth I am setting up in march. Tricky part is no power. So, I grabbed the fixture, blasted with a base coat of paint and am posting here for guidance on making this battery operated. Anything is possible I know but in this case I would like a few requirements to be met 1. I'm a maker, and a broke one at that, I don't want to spend $250 on a battery go anywhere plug in device ...its expensive plus if I can make my own I'm happier, mmo cheaper I'm even more happy, mmo with more "found" parts I'm even more happiest! ;-p  2. I'm a lil thing, 90lb soaking wet... I had to hump 120 pound packs w heavy radios back in my USMC days, however I'm not in the corps so I don't want to pack a 120 pound battery thru a convention center for my Lil display. Light as possible battery solution for my light please!;-p 3. I can't use solar at this location, I do have limited space and finally 4. If possible I'm trying to keep this looking nice. This is for my display table. The broke part...I need to make money and that means slick looking booth that people will be drawn towards, handing over their hard earned money for amazing well lit steampunk treasure. I love duct tape, even mentioned it on my dating profile...but it doesn't scream style. Just saying ;-p I'm not surrounded by fellow makers or tools so me chatting ideas out with friends and fine tools isn't I'm here i n hopes my fellow interweb maker family can help me out here. I have basic electrical knowledge, basic tools, color blind but I think were OK with these few colors here. I took photos to assist the visual and stir creative juices.  Mahalo for taking time to read and inspire! 

Topic by feeorin   |  last reply

How to make a pairing Device

Can anyone make a pairing device on radio or whatever signal which gets activated and initiate signal which can trigger an alarm when both already paired units lose mutual connection due to increase of distance? I want to use this with my car and put the alarm device in my room. If car is moved, say 10 feet away from the pairing device it should trigger an alarm.

Topic by malkandi   |  last reply

Survey for personal fabrication

I am doing a short survey on personal fabrication envisioning a future where things are made to order. Please participate in this survey and provide feedback to improve the survey. The survey link is shown below-

Topic by 3dgeek   |  last reply

Help! Did I buy the wrong FTDI cable?

So I just ordered this cable to use with this Arduino board and I think it may be the wrong cord because it says it's specifically for Raspberry Pi and something about resetting the Arduino won't work. So my question is, am I right for thinking that this is the wrong cable, or is there a way to make this work?

Topic by njaber   |  last reply