Combine 2 powerbanks for mobile

Hello, I have 2 old powerbanks that didn't have enough cappacity. So I want to combine the 2. But both have 5v 800ma output. So if I am afraid that the voltage or the ampere will be to high. How can I combine the 2 without damaging my phone? Sorry for my bad english. Greeting, Thijs

Topic by Thijsd4   |  last reply


what do you use to protect your rechargeable batteries while charging?

I got this off ebay (see attached image).  But it just flashes extremely fast between red and blue when charged (which is obnoxious since I can see it - you would not want this charging in your room at night, it's like a crazy strobe).  Another from a different seller just lights both red and blue at the same time.  Does anybody have other suggestions for what to use?  I don't need it to have lights.  Thanks.

Topic by aliasjanedoe   |  last reply


DC motor speed controling

HI!  I'm trying to mod my Tascam cassette recorder. I want to be able control speed of the motor. So I bought on ebay PWM controller and after installation thing don't run so smooth as I wish. the problem is ... when pot is all the way down at 7 clock motor is off, when I turn it to 8 a clock motor starts spinning and reaches its full speed at 9 a clock. and from 9 a clock to 4 there is no effect on speed. Please help me! .... my electronic skills are too weak to understand this. p.s  it is 12v dc motor and there is link for the pwm I use.  http://www.ebay.co.uk/itm/111817741979?_trksid=p2057872.m2749.l2648&ssPageName;=STRK%3AMEBIDX%3AIT Thanks    

Topic by AndrisT1   |  last reply


Car Alternator Battery Charging

Here is an alternator. 75 amp 12 volts. But i m not sure how to connect the 3 wires.. what i know is that screw in black plastic case is battery +ve and alternator body is battery -ve, Please guide me how to use other 3 wires ( green black and yellow). Thankx in advance ;)

Topic by SyedA58   |  last reply


Wireless charging of smartphones anywhere within a 30 foot radius, without-pad !

Just read there is a 10W transmitter IC that has been developed to power a receiver IC collecting 6W of that energy... Both are ASIC chips that can operate and power power mobile devices up to 30 feet apart. Even though the RF energy is deemed safe. I would plan on using a Faraday helmet and maybe lead under wear when next I visit a coffey house.

Topic by iceng   |  last reply


Help for realising a linefollower tankbot

Hello, I want to realize a linefollowing tank bot. I got this following parts: - Arduino Mega 2560 - Arduino MotorShield Rev03 - Pololu QTR-8RC Array - Pololu RP5 Tankchassis (6V DC Motors) Now all parts are together and the code must be completed. Therefore I found a really nice PID-based tutorial for linefollower: http://letsmakerobots.com/blog/enigmerald/pid-tutorials-line-following I create a program, but after calibrating the sensors, the bot doesn't drive on the line. It makes no sense were it drives. Most time it do 90° turns and so on. Do you find a better solution for my code? [code] #include #include   /////////////////////////// // define constants   // /////////////////////////// #define AUTO_CALIB  false      // Autokalibrierung aktivieren #define DEBUG_ENABLE   true               // false=keine Serial Ausgaben #define NUM_SENSORS    8                  // Anzahl der verwendeten Sensoren #define TIMEOUT        2500               // waits for 2500 microseconds for sensor outputs to go low #define EMITTER_PIN    QTR_NO_EMITTER_PIN         // Default: kein Emitterpin definiert #define MOTOR_SPEED    100               // PWM Signal 0-255 (Basismotorgeschwindigkeit) #define MOTOR_MAX_SPEED 255       // PWM Signal für Maximalgeschwindigkeit #define KP     0.2                    // KP-Wert für PID Regler #define KD     5                     // KD-Wert für PID Regler ( Beachte: Kp < Kd) #define SERVO_PIN1  11       // PWM Ausgang für Servo1 #define SERVO_PIN2  12       // PWM Ausgang für Servo2 #define CALIB_LED   13       // LED Ausgang für Kalibrierungsphase ////////////////////////// // define variables     // ////////////////////////// // Zuweisung der Sensoren 0-7 an die digitalen IO's 22-29 QTRSensorsRC qtrrc((unsigned char[]) {22, 23, 24, 25, 26, 27, 28, 29}, NUM_SENSORS, TIMEOUT, EMITTER_PIN); unsigned int sensorValues[NUM_SENSORS]; int MotorLeftSpeed=3;                  // PWM pin for speed control left int MotorRightSpeed=11;                // PWM pin for speed control right int MotorLeftDirection=12;            // digital pin for direction control left int MotorRightDirection=13;            // digital pin for direction control right int MotorLeftBrake=9;                  // digital pin for brake control left int MotorRightBrake=8;                 // digital pin for brake control right int lastError = 0; ///////////////////// // Initialisierung // ///////////////////// void setup() {     // Initialisierung verschiedner IOs   pinMode(CALIB_LED, OUTPUT);    // Definiert LED Ausgang für Kalibierungsphase       // Initialisierung linker Motor   pinMode(MotorLeftDirection, OUTPUT);      // Definiert Ausgang für den linken Motor   pinMode(MotorLeftBrake, OUTPUT);          // Definiert Bremse für den linken Motor   pinMode(MotorLeftSpeed, OUTPUT);   // Definiert Geschwindigkeitsausgang für linken Motor   // Initialisierung rechter Motor   pinMode(MotorRightDirection, OUTPUT);     // Definiert Ausgang für den rechten Motor   pinMode(MotorRightBrake, OUTPUT);         // Definiert Bremse für den rechten Motor     // Initialisierung Servo Motoren   servo1.attach(SERVO_PIN1);     // Zuweisung PWM PIN für Servo1   servo2.attach(SERVO_PIN2);     // Zuweisung PWM PIN für Servo2   if (DEBUG_ENABLE)   {    Serial.begin(9600);    Serial.print("Debug Modus aktiviert:\n");     }     delay(500);     digitalWrite(CALIB_LED, HIGH);    // turn on Arduino's LED to indicate we are in calibration mode   for (int i = 0; i < 400; i++)   // make the calibration take about 10 seconds   {     qtrrc.calibrate();           // reads all sensors 10 times at 2500 us per read (i.e. ~25 ms per call)   } delay(20);      // The 20 ms delay in the calibration code is intended to make the routine take a reasonable amount of time.     digitalWrite(CALIB_LED, LOW);     // turn off Arduino's LED to indicate we are through with calibration       if (DEBUG_ENABLE)    {    // print the calibration minimum values measured when emitters were on       for (int i = 0; i < NUM_SENSORS; i++)    {   Serial.print(qtrrc.calibratedMinimumOn[i]);   Serial.print(' ');    }    Serial.println();       // print the calibration maximum values measured when emitters were on    for (int i = 0; i < NUM_SENSORS; i++)    {   Serial.print(qtrrc.calibratedMaximumOn[i]);   Serial.print(' ');    }    Serial.println();    Serial.println();   }   delay(1000);   } /////////////////// // Main Program  // /////////////////// void loop() {   // read calibrated sensor values and obtain a measure of the line position from 0 to 5000 // To get raw sensor values, call: // qtrrc.read(sensorValues); instead of unsigned int position = qtrrc.readLine(sensorValues); // Variable positon zeigt die genaue Position (0-7000) an   unsigned int position = qtrrc.readLine(sensorValues); // get calibrated readings along with the line position, refer to the QTR Sensors Arduino Library for more details on line position. int error = position - 3500;  // 3500 is the desired position   if (DEBUG_ENABLE)   {    // print the sensor values as numbers from 0 to 1000, where 0 means maximum reflectance and    // 1000 means minimum reflectance, followed by the line position    for (unsigned char i = 0; i < NUM_SENSORS; i++)    {     Serial.print(sensorValues[i]);     Serial.print('\t');    }    Serial.print(position);    // comment this line out if you are using raw values   } int motorSpeed = KP * error + KD * (error - lastError); lastError = error; int rightMotorSpeed = MOTOR_SPEED + motorSpeed; int leftMotorSpeed  = MOTOR_SPEED - motorSpeed;     if (rightMotorSpeed > MOTOR_MAX_SPEED ) rightMotorSpeed = MOTOR_MAX_SPEED;    // Verhindert dass die Maximalgeschwindigkeit überschritten wird if (leftMotorSpeed > MOTOR_MAX_SPEED ) leftMotorSpeed  = MOTOR_MAX_SPEED;    // Verhindert dass die Maximalgeschwindigkeit überschritten wird if (rightMotorSpeed < 0) rightMotorSpeed  = 0;          // Verhindert einen negativen Geschwindigkeitswert if (leftMotorSpeed < 0) leftMotorSpeed   = 0;          // Verhindert einen negativen Geschwindigkeitswert   {   // Ansteuerung der Motoren durch PID Berechnung   digitalWrite(MotorRightBrake, LOW);     // Motorbremse rechts deaktivieren   digitalWrite(MotorLeftBrake, LOW);     // Motorbremse links deaktivieren   digitalWrite(MotorRightDirection, HIGH);   // Motor rechts im Uhrzeigersinn  --> fährt vorwärts   digitalWrite(MotorLeftDirection, LOW);    // Motor links gegen den Uhrzeigersinn  --> fährt vorwärts   analogWrite(MotorRightSpeed, rightMotorSpeed);  // Motorgeschwindigkeit rechts in Abhängigkeit des PID Reglers   analogWrite(MotorLeftSpeed, leftMotorSpeed);  // Motorgeschwindigkeit links in Abhängigkeit des PID Reglers }           } [/code]

Topic by julianpe   |  last reply


Coanda effect VTOL or "hovercraft" - making a working model

I am currently working on the design of an impeller driven lifting device utilising the Coanda effect. My 3D printer is of course a great help here but only useful to test the vacuum cleaner assembly that I salvaged for the motor and impeller part. So far it is just I am interesting to see myself instead of reading it on the net but I was wondering if any RC model makers out here would be interested too? I have no clue about the available brushless motors and controllers or how much extra weight for electronics, batteries and so on but could provide the 3D files and design tips if anyone would dare to create a working RC model. Unlike all the designs on Youtube no propeller is used for the lift! Those designs might still use the Coanda effect, or better adjust it's airflow, for the steering but the actual lift comes from a prop. An impeller as used in vacuum cleaner does not provide lift and is more the "real deal". The last real world project that I know of was the Avrocar that was tested during the cold war but never made it into production. Just though it might be an interesting project to build your own "flying saucer" :)

Topic by Downunder35m 


Arduino and esp8266

Hi, I am new to arduino and creating project where i connected arduino uno and esp8266 as follows: UNO --- ESP8266 RX ----- RX TX ----- TX GND --- GND 3.3V --- VCC 3.3V --- CH_PD I power arduino uno and it is working fine. i checked by uploading blink program. when i connect esp8266 to arduino uno and open serial monitor i am getting some garbage text which is shown in below screen shot. also when i connect esp8266 to uno the orange light is continuously blinking. no action on entering AT command in serial monitor. some one please let me know how to get it work.

Topic by sayedfar   |  last reply


Help DIY Wireless Video Transmitter

Hi !  I'm working on a Tech Project and I need a wireless video transmitter.  A webcam or any video camera provides a video stream, my computer receives it.  I've searched on the Internet but I've only found shopping solutions.  There are different way of transmitting which seem to be efficient :  - IP - Wifi  I want to make it by myself => build the transmitter and the receiver, connect the transmitter to the video camera, connect the receiver to the computer to collect the video stream. This is a project for my engineering school. Is it possible and affordable for 100€ ?  What do I need ?  Thanks 

Topic by CedricA2   |  last reply


heat_up room by soldering iron ?!

Hi everybody :D I have a soldering iron and a computer fan. and I was thinking if I can use them to heat up my room!  I asking If any body tried it beform or have an idea. 

Topic by abbadi   |  last reply


Embedded Systems Using Arduino

Hello! I am a Filipina, Computer Engineering Student. I would like to ask for your help and also to seek ideas about the possible projects I can make in my Embedded System Class using Arduino. I'm eyeing "Biometrics Attendace System" as my project but I decided to look for a simpler project. Thankyou very much. :)

Topic by Rosas25 


easy recharging method for child's toy

I want to use a rechargeable battery inside a toy, and I don't want to remove the battery for charging.  I'm looking for a simple and safe method for charging that a young child can do by themself.  Here are some thoughts I've had: wireless (such as with a qi pad) = Is there any way to actually keep this from getting hot?  I'm assuming the base would be always on, and the toy would be left on it all night or longer. solar = This requires a light or the sun to charge.  I'm considering putting the solar cell in the bottom of the toy and making a light base that it could be placed on, but I'd need some type of sensor or switch so it only lights when the toy is on it. metal contact pads = This would be easier than a plug since you'd only need to set the toy down, but can it be done safely?   Anybody have suggestions?  Thanks.

Topic by aliasjanedoe   |  last reply


Take a Photo, Get a patch! (my new monthly give away)

Some of you may have noticed that I stopped doing my famous 'Desktops of [current month]' Forum topics.  These few days of past, I may have bought myself three cameras, so it prompted me to think. Thus I bring you my new monthly forum topic, which I hope more people can get involved with than the Desktop wallpaper topics. Essentially, every month I am going to post a topic with a distinct theme. The task then is for you guys to go out and take a picture along that theme, and post it as a comment. This months theme is an introductory one -    Camera Self Portrait Go and take a picture of your camera using your camera. Make the most of reflective surfaces, and interesting techniques. If you own more than one camera I want you to use your favourite, because this is the first topic, think of it as a 'hello, meet my camera'. You do not have to be in the photo, so you can still take part if your conscious of putting your picture on the webz. Remember, the best camera is the one you have with you. I know that one of you could easily take an amazing picture with your phone, while someone with a nice Canon 7D could struggle to find a nice shot.  Every person who posts gets a patch!  Here is a picture of me with my Canon just after I had got my 50mm prime lens!

Topic by gmjhowe   |  last reply


UV Filter on a digital camera

I was told by a few people that UV filters are useless on a digital camera. I also listened to the sales guy when I bought a DSLR just recently and he said "No they serve no purpose for the pics with a digital camera, but it adds a layer of protection to the front lens. UV filters are cheap, I bought it based on the salesman's advice. Yesterday it paid for itself . I was getting ready to take some pics of the neighbors new sports car and he was showing off,  spinning the tires when it happened. The filter just all the sudden shattered. It had to be from a rock, but I could not find one anywhere.... anyway... The camera lens is fine and has a brand new UV filter on.

Topic by SlickSqueegie   |  last reply


pls help

Last day I bought a 3.5 inch touchscreen from amazon it was written in the description that it was compatible with arduino uno which I currently have but when the screen arrived it was only compatible with arduino mega and I couldnt return. Is there any thing I can do with the screen to work with uno or should I have to buy an arduino mega 

Topic by 2illickans   |  last reply


Lithium ion battery capacity calculations?

     I'm working on a project that uses lithium ion batteries as the power source and cannot figure out how to calculate how long it will run for.  I have four 2.6Ah batteries connected in parallel, giving me a total of 10.4Ah of capacity.  They're lithium ion so the nominal voltage is 4.2v and the minimum I want to bring them to is 3v.  My project draws a constant 2.85W of power, regardless of the voltage put into it.  What I want to know is, is there any way to calculate or even just approximate how long these batteries will power my project before they run out (the voltage drops below 3v)?  The batteries are high quality, so the 2.6Ah rating is pretty reliable.  Let me know if there are more specifications needed or something.   Thanks ~Dudes

Topic by dudes   |  last reply


Temperature sensor using LTC2984

Dear Sir, I am using following device to measure temperature accurately,http://www.linear.com/solutions/5500 According to datasheet, the eval board can show a virtual temperature output using built in thermocouple thermister, RTD etc in ADC mode . http://www.linear.com/product/LTC2983, I need to measure real temperature which they apply in Heat bath or temperature calibration set up. I dont have such set up now, could you kindly give me a way out that without those set up I could manage Thermistor ? Kindly go through the page 43-47 in this datasheet, http://cds.linear.com/docs/en/datasheet/2983fb.pdf. Thanks in advance.

Topic by Hasan2015 


war games simulation batch file

This is a batch file that mocks the movie war games i only used simple commands but it still took about a week to complet post where you think it can be improved i have already improved the impact display but havent posted it yet @echo off title thermonuclear war color 0a :top echo would you like to play a game ? set /p ans= if not defined ans  (goto please ) if %ans%==yes (goto yes ) if %ans% NEQ yes (goto exit ) :please cls echo please type a responce echo (no caps) pause goto top :exit exit :yes cls echo welcome what is your name? set /p name= if not defined name ( goto please ) if %name% EQU mythbatcher (goto russialoser ) cls echo welcome %name% echo. echo thermonuclear war simulator activated echo. echo %name% you have the first move echo. echo who would you like to fight for? echo 1=America   2=Russia set /p side= if not defined side (goto please ) if %side%==2 (goto america ) if %side%==1 (goto russia ) :america cls echo %name% you are fighting for Russia                    echo.                           America - defcon 5 echo you have the first move echo how many icmb's would you like to fire 1~5 set /p num= if %num%==1 (goto one ) if %num%==2 (goto two ) if %num%==3 (goto three ) if %num%==4 (goto four ) if %num%==5 (goto five ) :one cls echo icbm fired at New Yourk City                            America defcon 4 echo estimated time untill  impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto america 2 :two    cls                              echo two icbm's fired at New York City New York and Los angles Califorina                  echo time untill impact 30 seconds                                       America defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto america2 :three cls echo three icbm's fired at New York City New York and Losangles Califorina and Seatle Washington echo time untill impact 30 seconds                                        America defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto america2 :four cls echo four icbm's fired at New York City New York and Losangles Califorina and Seatle Washington and Pitsburg Penslevania echo time untill impact 30 seconds                                America defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto america2 :five cls echo five icbm's fired at New York City New York and Losangles Califorina and Seatle Washington and Pitsburg Penslevania and Boston Masetucetts echo time untill impact 30 seconds                             America defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto america2 :america2 cls echo %name% you have another move                      America - defcon 4 echo. echo how many icmb's would you like to fire 1~2 set /p num= if %num%==1 (goto one1 ) if %num%==2 (goto two1 ) :one1 cls echo one icbm fired at Washington D.C. echo time untill impact 30 seconds                       America - defcon 3 ping localhost -n 4 >Nul cls echo impact pause goto america3 :two1 cls echo two icbm's fired at Washington D.C. and Miami Florida      echo  time untill impact 30 seconds          America - defcon 3 ping localhost -n 4 > Nul echo impact pause goto america3 :america3 cls echo %name% you have another turn echo i can not fire untill i reach defcon1 echo. echo you may now fire a icbm or a nuclear war head echo 1-icbm  2-nuclear war head set /p wepon= if not defined wepon ( goto please ) if %wepon%==1 (goto icbm ) if %wepon%==2 ( goto nuc ) :icbm cls echo one icbm fired at  the Smithsonian archive bunker echo time untill impact 30 seconds                    America - defcon 2 cls ping localhost -n 4 > Nul echo impact pause goto defcon1 :nuc cls echo one nuclear war head fired at the US Capital          America - defcon 2 echo time untill impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto defcon1 :defcon1 cls echo. echo America totlaly devestated echo. echo America - defcon 1 echo. echo time untill impact 30 seconds echo. echo you may wait untill impact or fire your remaning war heads echo    wait               fire set /p desion= if not defined desion (goto please ) if %desion%==wait (goto Russiawait ) if %desion%==fire ( goto Russiafire ) :Russiawait cls echo time untill impact of american icbm's 10 seconds ping localhost -n 4 > Nul cls echo impact echo all remaning defences destroyed echo total devestation is imenent pause goto end :Russsiafire cls echo remaning misles fired echo time untill impact 30 seconds ping localhost -n 4 > Nul echo impact pause goto Russiawait :end cls echo. echo *--------------------------------------------------------------* echo      GAME OVER echo *--------------------------------------------------------------* echo. echo game results echo. echo AMERICA - LOSE echo. echo RUSSIA - LOSE echo. echo total result NO WINNER echo. echo an interisting game, echo the only way to win is not to play. echo. pause goto top2 :top2 cls echo would you like to play again? echo. set /p gameagain= if not defined gameagain (goto please ) if %gameagain% EQU yes (goto top ) if %gameagain% NEQ yes (goto exit ) :russia cls echo %name% you are fighting for america                    echo.                    Russia - defcon 5 echo you have the first move echo how many icmb's would you like to fire 1~5 set /p num= if %num%==1 (goto one1 ) if %num%==2 (goto two2 ) if %num%==3 (goto three3 ) if %num%==4 (goto four4 ) if %num%==5 (goto five5 ) :one1 cls echo icbm fired at Moscow                       Russia - defcon 4 echo estimated time untill  impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto russia 2 :two2    cls                              echo two icbm's fired at Minsk and Moscow          echo time untill impact 30 seconds                                    Russia - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2 :three3 cls echo three icbm's fired at Minsk and Moscow and Leningrad echo time untill impact 30 seconds                                        America - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2 :four4 cls echo four icbm's fired at Minsk and Moscow and Leningrad and Kiev echo time untill impact 30 seconds                                America - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2 :five5 cls echo five icbm's fired at Minsk and Moscow and Leningrad and Kiev and Tashkent echo time untill impact 30 seconds                            Russia -  defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2 :russia2 cls echo %name% you have another move                      Russia - defcon 4 echo. echo how many icmb's would you like to fire 1~2 set /p num= if %num%==1 (goto one11 ) if %num%==2 (goto two11 ) :one11 cls echo one icbm fired at Baku   echo time untill impact 30 seconds                       Russia - defcon 3 ping localhost -n 4 >Nul cls echo impact pause goto russia3 :two11 cls echo two icbm's fired at  Baku and Kharkov echo  time untill impact 30 seconds         Russia - defcon 3 ping localhost -n 4 > Nul echo impact pause goto russia3 :russia3 cls echo %name% you have another turn echo i can not fire untill i reach defcon1 echo. echo you may now fire a icbm or a nuclear war head echo 1-icbm  2-nuclear war head set /p wepon1= if not defined wepon1 ( goto please ) if %wepon1%==1 (goto icbm1 ) if %wepon1%==2 ( goto nuc1 ) :icbm1 cls echo one icbm fired at  Gorki echo time untill impact 30 seconds                    Russia - defcon 2 cls ping localhost -n 4 > Nul echo impact pause goto defcon1r :nuc1 cls echo one nuclear war head fired at Novosibrisk         Russia - defcon 2 echo time untill impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto defcon1r :defcon1r cls echo. echo Russia totlaly devestated echo. echo Russia - defcon 1 echo. echo time untill impact 30 seconds echo. echo you may wait untill impact or fire your remaning war heads echo    wait               fire set /p desion1= if not defined desion1(goto please ) if %desion1%==wait (goto Americawait ) if %desion1%==fire ( goto Americafire ) :Americawait cls echo 30 seconds untill Russian icbm impact ping localhost -n 4 > Nul echo impact pause goto end :Americafire cls echo all remanig icbm's fired at Russian states echo time untill impact 30 seconds ping localhost -n 4 > Nul cls goto Americawait exit :russialoser cls echo welcome mythbatcer you are fighting for america                    echo.                    Russia - defcon 5 echo you have the first move echo how many icmb's would you like to fire 1~5 set /p num= if %num%==1 (goto one11 ) if %num%==2 (goto two21 ) if %num%==3 (goto three31 ) if %num%==4 (goto four41 ) if %num%==5 (goto five51 ) :one11 cls echo icbm fired at Moscow                       Russia - defcon 4 echo estimated time untill  impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto russia 2m :two21   cls                              echo two icbm's fired at Minsk and Moscow          echo time untill impact 30 seconds                                    Russia - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2m :three31 cls echo three icbm's fired at Minsk and Moscow and Leningrad echo time untill impact 30 seconds                          America - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2m :four41 cls echo four icbm's fired at Minsk and Moscow and Leningrad and Kiev echo time untill impact 30 seconds                                America - defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2m :five51 cls echo five icbm's fired at Minsk and Moscow and Leningrad and Kiev and Tashkent echo time untill impact 30 seconds                            Russia -  defcon 4 ping localhost -n 4 > Nul cls echo impact pause goto russia2m :russia2m cls echo %name% you have another move                      Russia - defcon 4 echo. echo how many icmb's would you like to fire 1~2 set /p num= if %num%==1 (goto one111 ) if %num%==2 (goto two111 ) :one111 cls echo one icbm fired at Baku   echo time untill impact 30 seconds                       Russia - defcon 3 ping localhost -n 4 >Nul cls echo impact pause goto russia3m :two111 cls echo two icbm's fired at  Baku and Kharkov echo  time untill impact 30 seconds         Russia - defcon 3 ping localhost -n 4 > Nul echo impact pause goto russia3m :russia3m cls echo %name% you have another turn echo i can not fire untill i reach defcon1 echo. echo you may now fire a icbm or a nuclear war head echo 1-icbm  2-nuclear war head set /p wepon11= if not defined wepon11 (goto please ) if %wepon11%==1 (goto explosionboom ) if %wepon11%==2 (goto explosion ) :explosionboom cls echo one icbm fired at  Gorki echo time untill impact 30 seconds                    Russia - defcon 2 ping localhost -n 4 > Nul echo impact pause goto defcon1m :explosion cls echo one nuclear war head fired at Novosibrisk         Russia - defcon 2 echo time untill impact 30 seconds ping localhost -n 4 > Nul cls echo impact pause goto defcon1m :defcon1m cls echo. echo Russia totlaly devestated echo. echo Russia - defcon 1 echo. echo time untill impact 30 seconds echo. echo you may wait untill impact or fire your remaning war heads echo    wait               fire set /p desion11= if not defined desion11(goto please ) if %desion11%==wait (goto waitforboom ) if %desion11%==fire ( goto firethosebooms ) :waitforboom cls echo 30 seconds untill Russian icbm impact ping localhost -n 4 > Nul echo impact pause goto ENDM :firthosebooms cls echo all remanig icbm's fired at Russian states echo time untill impact 30 seconds ping localhost -n 4 > Nul cls goto wait22 :endm cls echo. echo American scientest have descoverd the [x-wav] lazar echo this lazar can fit into a small simple packege and emitts no radiation echo The [x-wav] lazar can burn an area of sixty thousand miles across echo in under an  hour echo We have assembled an army of U-2 Dragon ladies outfitted with this revolutionary technology echo We will strik on your command echo. echo type strik to fire the  [x-wav]. This is our finest hour, America lies in your hands now echo good luck %name% echo. set /p command= if not defined command (goto please ) if %command% EQU strik (goto imposoble ) if %command%==wait (goto end ) if %command%==fire (goto imposoble ) :please1 cls echo incorrect responce pause goto endm :imposoble cls echo [X-WAV] SUCCESFUL echo You have won!!!!!!!!!!!! echo. echo *--------------------------------------------------------------* echo      GAME OVER         CONGRADULATIONS echo *--------------------------------------------------------------* echo. echo game results echo. echo AMERICA - !!!!!WIN!!!!! echo. echo RUSSIA - LOSE echo. echo total result YOU ARE THE WINNER echo. echo an interisting game, echo the only way to win is not to play. echo. echo or is it echo. echo yu have unlocked a "secret" echo in TBMS V3.0 type secret in the main menu echo somthing interesting migh happen echo. pause goto top2  

Topic by Laserman595   |  last reply


Mitre saw comparison

Hi, I'm looking to either buy the Bosch GCM 12 GDL Professional or the Metabo KGS 315 Plus Crosscut mitre saw. Ive done a bit of homework and both saws appear fairly decent, however the Metabo doesn't appear to have many objective reviews. Can you please recommend one over the other giving reasons for your choice? Thank you very much in advance.

Topic by Jono12   |  last reply


Help with Arduino Coding

Hello. I have recently been interested in coding Arduino and the USAF lets me to launchpads to setup remote cameras that are sound activated for a rocket launch. I was working on designing an Arduino connected to one of the cheap sound detector modules on eBay. The camera would be triggered by a short circuit on the digital end, with the sound module on the analog end. The camera is activated by a short circuit on the shutter release, so I though I would have + going into the camera when sound is activated with the other cables on ground. I just needed someone to check over my coding, as I am debating whether or not to buy an Arduino. No errors appeared on the computer, so I don't know if it will work fine or not                                                                                                                                                                                                                void setup() {}   //Just there as placeholder: void loop()    //To repeat a function of detecting sound: {const int SoundDetectorPin = A2;  //Sound Detector Module located at Analog pin 2:   const int CameraTriggerOutput = 3;  //Dual Trigger Output is located at Digital pin 3: //Following is If functions: if (analogRead(SoundDetectorPin) == LOW) //When power is read, if it is LOW, the trigger detected sound:      digitalWrite(CameraTriggerOutput, HIGH); //Pin 3 is given positive voltage: else {  //If opposite happens:     digitalWrite(CameraTriggerOutput, LOW); //When power is read, if it is HIGH, the trigger is detected nothing and no command is excecuted:    } }                                                                                                                                

Topic by SpaceShuttleFan   |  last reply


Micro drone construction help

For a school project a partner and I are attempting to build a self controlling quadcopter. It should be able to use a specific input from a photo transistor and the be able to navigate on its own. The only problems that I can see running into at the moment are finding an atmega compatible rotor controller, and that not including the propellers it is going to be under two inches (5.08 cm). I would appreciate any assistance possible in finding a motor controller of this size, and will keep this post up to date with our project.

Topic by Kaptia Teramo 


V-22 osprey tilt rotor aircraft model

Hi i'm new to rc planes and drones so im making a model of v22 osprey tilt rotor aircraft i'm using the following components Arduino Mega 2x 2217/6 2300 kv brushless motor 6x micro servo for surface area control 2.4 ghz tx/rx fsct6b 6dof for stabilization i need help in controlling the bldc motors and servo by arduino mega using the 2.4 ghz tx/rx 

Topic by Daveluv1   |  last reply


Brainstorming - Teamspeak PTT Bluetooth Device

Gurus of the Tech World, First off, I'm browsed through a lot of great idea and I've got to say, you all are geniuses.  Hopefully, someone can help steer me in the right direction.  I have made a few Windows Phone apps, made a few HTML websites and some networking fundamentals, but I've never really made a device... much less soldered a board. With that said, I want my first project to be a Bluetooth Push-to-Talk (PTT) button for Teamspeak.  I have a Bluetooth headset with a microphone for Teamspeak (VOIP PC Application) so I can hear people speaking while being away from the computer but I do not have a way to communicate back using the Push-to-Talk method. So, what I want to do is make a small Bluetooth device, maybe powered by a 9V, with a single PTT button, and maybe an ON/OFF switch to save power.  My thought is to program it so that it send a keystroke to my computer for the duration that the PTT button is pressed (CTRL would be ideal).  This is something that I want to make, using as much of my brain as possible and the least amount of prefabricated merchandise ("omg, just buy a bluetooth dongle and plug it into a button. ta-da"). I'm sure that this is something you guru's can do blindfolded, but, please, point me in the right direction... and use baby words. Thanks! Stryker2k2 (@stryker2k2)

Topic by Stryker2k2   |  last reply


Laser engraving slate

Hi all Thinking about putting a project together based on some of the great instructables on here. Can anyone shed any light on how much power I will need for a laser that will engrave slate? I am not sure whether a diode laser will be up to the job or whether it will have to b a co2 laser. Any info would be appreciated.

Topic by gary101   |  last reply


Core Wars: The battle of the programmers.

Okay, brace yourself for a lengthy background story: In the 1960's and 70's, computers were much too expensive for a normal person to have one all to themselves. Before the invention of the Personal Computer (PC), computer systems were mainly employed in large universities, able to be used by students. However, there came a danger with all this: Back then, there was no such thing as protected memory, meaning that someone with minor hacking skills and some knowledge of assembly could easily wreak havoc on other people's data and programs. One such urban legend is that of a major business firm's main computer system, which a mischievous employee had installed his own assembly program called creeper, who's only purpose was to create copies of itself whenever it was run. This soon became a problem, as the creeper virus began eating up precious space in the memory and began corrupting other people's data and programs. After a while, another more brightly-hatted programmer created a program called reaper, which would make numerous copies of itself and destroy any creeper virii it could find and then self-destruct. Soon enough, things were back to normal. After hearing this story, a programmer named A.K. Dewdney got the idea for a game which he called "Core Wars". In this game, people would write computer programs called "warriors" in an assembly language called Redcode. Redcode had instructions not out of the ordinary of any assembly language. These programs were then run simultaneously in a simulated computer called MARS. The aim of the game was to make the opposing program crash by forcing it to execute an illegal command in the computer's shared memory. The surviving program was declared the winner. The absolute simplest warrior was called imp, and was written by Dewdney: MOV 0, 1 The MOV command moves copies a command from one place to another, in a position relative to the MOV command. Because of this, the imp would fill up the entire memory with MOV commands in a relatively short amount of time. Because the memory loops around (So, if the size of the memory is 8000 commands, then command 8001 would be executed as command 0) then it meant imp would always hit it's target eventually if it wasn't hit first. Another program which was written by Dewdney is called Dwarf: bomb      DAT 0,0 Dwarf     ADD #4,-1                 MOV bomb,@bomb                JMP Dwarf End Dwarf This is the first example of a "bomber" program. This program would drop DAT 0,0 (An illegal command) at every fourth slot in the memory in the hopes that the other program would accidentally execute it (cookie if you can figure out how it works). There are far other types of examples, like scanners, which try to scan the commands around it to see if they are illegal. Some programs can even repair themselves mid-battle. So, does anyone else still partake in this ancient game? I recently just got into it, writing my first warrior program a few days ago. Have no idea if it works, but it sounds pretty cool. It's based off of Dewdneys Dwarf but with a few modifications (I named it MindSplitter): bomb      SPL 1                 JMP -1                 DAT 0,0 Split        ADD #5,-1                 MOV bomb,@bomb                JMP Split End Split First off, this plants bombs at every fifth command instead of fourth, which I hope will help it spread out. Second, the bomb it uses is my personal invention that I call the Splitter bomb. In Redcode, the SPL command will jump execution to the specified command, while at the same time continue executing the commands after it. The idea is that the SPL will split to the jump command while the normal execution goes to the jump command, and both of them jump back to the SPL, therefore filling up all of the enemy programs processes. If the enemy program somehow manages to escape the loop, there is a deadly DAT after it. I haven't tried this out yet and I'm not sure how it would do in battle. If someone with a MARS emulator and a warrior of their own would like to put it to the test, I'd would absolutely love to hear how it turns out :).

Topic by dungeon runner   |  last reply


Transparent Electrical Insulator Film

For a project of mine I need to apply a <1um thick film that is electrically insulating, but transparent to UVC & UVB (and preferably up to visible). Does anyone have any suggestions?

Topic by SillyInventor   |  last reply


Adobe ..... unable to load module - How to fix the start problem in regards to the video driver

I had to install Adobe Premier for a friend with no real clues. Anyway, all was good and registered but the first start was aborted with an error stating that a module for the graphics card could not be loaded. The misleading suggestion underneath, stating to updated the graphics driver was of little use as the latest Nvidia driver was already installed. A support request with Adobe gave the suggestion to fully uninstall all Adobe products, using their clean up tool. After that a reboot and fresh install of all. You guessed it, Premier CC would still refuse to start with the same error. Google was of no use this time but a system check revealed the fix: Premier was trying to load quite a few things but some have been blocked by the virus scanner for no good reason. After setting exceptions for the problematic files I also checked the firewall and gave full access to all Adobe Premier related tasks. And sure enough there was no error message anymore! So if your Adobe product fails to start with an error in regards to being unable to load a module you might want to disable your virus scanner and firewall to check if they are to blame. I hope this might help all those lost with no useful support.

Topic by Downunder35m 


Replacing black ink with colour ink

Hi, I'm trying to do a uni project and I'm not having much look at the moment. What I want is for the ink in the black cartridge to be a colour ink instead of black. It did seem to work but now it's not. I flushed the cartridge with water several times to clean it out and then placed magenta ink in and the first through prints it started to print the Magenta but then stopped and how all it seems to do is leak from the cartridge and flood the base. The printer is a HP 1220c using HP 45 Cartridge which has the print head on the actual cartridge. Can anyone suggest anything? Thanks Phil

Topic by drop_dead_fred   |  last reply


Touch Sensitive counter project question

Hi everyone, Great to be part of this community. I am trying to make a touch sensitive counter, the sensor has to be as flat as possible, something like a thick cardboard, or I can put a flat sensor in between two sheets. It needs to handle about 10-20lbs of weight. It will go under fabric like carpet, so it cannot be super sensitive, clickable is fine. It will be connected to a very simple 1 or 2 digit counter. Any suggestions? PS: Eventually I'd like to upgrade this with a system that can instruct something else, for example 5 counters, display etc. Or be able to use bluetooth or wifi or arduino, and be able to count back. For example input 10 and it will count 1/10, 2/10, 3/10, etc..

Topic by tees_deney   |  last reply


Arduino high voltage capacitor charge indicator?

I made a 330v gauss gun and wanted a way how to know when capacitors charge, at first i took an led and resistor, that worked but is kinda boring. I want to use arduino and lcd to display percentage which should look more cooler. How should I measure the capacitor bank voltage with arduino? Should I use voltage divider? or there is a better way?

Topic by spudziuvelis   |  last reply


Combine two usb solar panels for higher wattage output

So, just thinking about this.  I have an anker 14w foldable solar panel.  I like it, but it seems to not quite have the wattage output that I would prefer.  What if I were to make cable that would join these two usb output sources into one.  Same voltage of course, just higher wattage potential. Again, just an idea.  Thoughts?

Topic by n5yzv   |  last reply


Motor and base design for optical toys

Hello everybody! I'm in the process of building a reiteration of a series of optical toys (like this one, or these) with motor, stroboscopes and little music system. The thing is their discs measure about 1 m (like 3,2 feets) and one of them (praxinoscope) is a heavy one due to the mirrors it possess (see photo [it isn't it's actual state]) so I created a metal base for it with a tube, three metal angles as legs and washing machine 115v ~60hz 70W 250VAC single phase motor soldered on (with capacitor), so the disc sits on top of the motor, and the thing is that after an hour of so of being tested on continuous duty it stopped and started to smell like burnt. What could the problem be? Could it be a design problem since the motor has all that weight on top? Should I have used gears and pulleys? How can I make it last longer without it being to complex?  If someone can help or has some ideas I'd appreciate it , thanks in advance! Benkos M. G.

Topic by BenkosM   |  last reply


Bokeh on mobile

I have seen how to make heart shape bokeh on instructables, is there any way to do such from phone camera. Any help is appreciated .

Topic by geekrex 


can i adapt recovered laptop camera to a usb?

I have a webcam recovered from broken laptop. i want to  use it with another computer through a usb port. i'm hoping all i need to do is properly attach wire harness to usb cord, download drivers to comp, and run. i'm sure it can't be that easy. the camera: Rose_2G/ CN0316-S30C-0V06-1/ VA-R02.02.02 the overall project if i can get past this step is to use it for a 'pinhole' door camera to be waterproofed and put behind the siding.

Topic by jbrown79   |  last reply


Servo Controlled door

Hey I'm making an arduino controlled door. Will a servo provide enough torque to open and close a bedroom door?

Topic by fruitkid101   |  last reply


LED blink based on proximity

Hi, I want a LED to start blinking if it is outside some area. Kind of a prisoner electronic bracelet :) What would be a cheap solution for this? Could I do this with 2 proximity sensors? Thank you.

Topic by PedroP46   |  last reply


ATX PSUI shorting out

​Hi everyone, I hope I did this well, first time on this site, this is a question. I want to make my own soldering iron/heating element, I know I can buy them but it is a project of mine and I just want to know how it works and make it. I used to power a copper wire with a 5V ATX PSU at 16Amps, the psu shorted out and stopped. I read somewhere that you can prevent the PSU from shorting out when there is enough resistance on the wire so the current is not too high for the PSU. (Total nitwit on electronics btw) I was wondering if this is true, and how can I build a succesful soldering iron with a PSU, what transistor or what modifications to make. Also, would a longer wire/rod produce more heat than a shorter? red hot would be nice. Thanks in advance!

Topic by JStuyfzand   |  last reply


Help with SMD marking!

Hello, I recently had a tablet to repair and this SMD IC was damaged: "C03AE". I can't figure out exactly what it is. Results I got range from LDO to Power switch to overcurrent protection. Does anyone know or have the datasheet for the latter? Its SOT-25 package. The tablet works fine without the IC (can charge, work on wall adapter only, etc). Here are some voltage readings WRT to ground (pin 2) and battery at 36% charge (pin numbering as per picture) Case 1: display ON, charger not connected: Pin 1, 3 and 4: 0.00V Pin 5: 3.64V Case 2: display OFF, charger not connected Same as case 1 Case 3: display ON, charger connected Pin 1: 4.74V Pin 3 and 4: 0.00V Pin 5: 4.64V Case 4: display OFF, charger connected Pin 1: 5.11V Pin 3 and 4: 0.00V Pin 5: 4.74V Any help is greatly appreciated. Best Regards, Nawaz

Topic by Nawaz   |  last reply


Buzzer for Gyser with 10 min timer

Hi Team,   I want to make a 220v buzzer with timer 10 min. My thought is to control my electricity bill by reducing  gyser usage. This buzzer will help me remind me that gyser is on for 10 min so that I can switch it off to save power. I know it is seemed to very easy for pro guys but very difficult for me. Please help me understand and make such buzzer with minimal budget.   I need help to make this project. Kindly let me know how can I do it.

Topic by vindude5   |  last reply


LEDs at less than forward voltage ; no resistor??

I'm new to playing around with LED's, so please forgive the ignorance.  Right now I am trying to make a homemade lamp of sorts.  I am using white LEDs with the following specs per the seller. FW current - 25 mA FW supply - 3.3V (typical), 3.6V (max) Tested one LED with two AAA batteries and no resistor.  I was told by radio shack guy that since supply voltage was less than FW supply I would be fine, and the LED would pull the amperage it needed.  Lit up and looked fine to me. I then found a 9V DC wall wart, and decided I wanted to run possibly up to 12 LEDs using 4 parallel strings of 3 LEDs in series (9.9 volt drop across each series).  I bought a multimeter and checked the DV voltage from the power supply, and it ran consistently between 9.1 - 9.2 volts.  The thought with the 9V wall wart was that the voltage supply would be lower than the FW supply, thus I would not need resistors, simplifying and reducing # of connections needing soldering (new to that as well). My question is, will this 9V work for my system?  I've tested 3 LED's in series, and also 2 parallel strings of 3 LEDs in series, and both lit fine.  I've read posts where people say that the lights will not light up or will be dim if the FW supply is not provided.  As mentioned, they seem fine to me, and as this lamp is planned for more of a mood lighting, I don't need it much brighter.  Is the only downside a dimmer light?  Will it last just as long?  My main concern is putting the time and effort into constructing this thing, and then having the LED's fail for some reason I don't understand, and having to rewire it all.  I've thought about buying a 12V supply and using a resistor, but would rather not unless there is a good reason to do so. Thanks in advance for any input!

Topic by brumachine82   |  last reply


Trying to repair micronta 22-164

I have a micronta talking multi meter 22-164 and after I put fresh batteries in it it keeps saying replace batteries. I found out other people have the same problem. 

Topic by tim4   |  last reply


Need help controlling two servos using arduino, bluetooth, and android.

Hi folks.  I am back.  I haven't been very active on here for the past several months, but I did move to a different continent.  Anyway, I need a little help from of those smart arduino folks out there.  I am looking for an app and arduino code to control two servos using an android device via Bluetooth.  There are a ton of instructables on controlling motors via Bluetooth, and there are also several tutorials on controlling one servo via Bluetooth, but what I want to know, is how to control two servos.  I am looking for something like this but able to control two servos.  I did try an app that uses an accelerometer to control two motors, but I want to be able to control them by a slide or nob.  If someone knows of a link that could be the solution to my problem I would be grateful for it. Any help would be greatly appreciated.  Thanks, th3_jungle_inv3ntor  -   actually I left the jungle :(

Topic by th3_jungle_inv3ntor   |  last reply


need help figuring out what these chips are good for

Im kinda new to electrical components i can follow a picture and put things where they are post to go but figuring out what the components are for no clue i'm currently working on making a 3d printer and was hoping that some of the these components that i found can be used for anything useful.  so heres the list of the chips LM741CN rca 832 P109 DM7473N  7945C  SN7475N MC14093B   CP   7939 ALSO MODEL Z240D10 SOLID STATE RELAY 3-32 VDC CONTROL TURNER ASSY 510-310 DRILL510-311 ITS A BORAD

Topic by MichaelD136   |  last reply


Arduino Car

Hi, So in computer engineering I've got to make a arduino based car, I've added a whole bunch of features such as IR tracking, obstacle avoidance(proximity sensor), optical tracking(follow a black line), and remote control through an android based phone. Since I'm a total newbie to technology I'm having trouble. I would appreciate it if You guys can point me towards resources and arduino libraries(for coding) that will work for me. Right now for coding I've only got basic pseudo-code setup since I do not know what libraries to use. I have searched up many sketches online and looked at them but didn't really understand any of the code. Here's the basic pseudo-code I got setup on the things that I've got to work on: DC Motor (4 of em for the wheels) (I also plan to add a stepper motor for turning right and left so if you could direct me on that as well) //Import necessary library //Setup the motors and pins //If signal for forward received //Code for moving forward //Set speed //Else If signal for backward received //Code for moving backward //Set speed //Else If signal for right received (keep turning right till stop signal received) //Code for moving right //Set speed //Else If signal for left received (keep turning left till stop signal received) //Code for moving left //Set speed //Else If signal for stop is received (Should we slow down to a stop or just stop?) //Code for stop //Set speed IR (I've got transmitting and recording diodes) //Import Library //Declare Pin for the IR Sensor //While loop: Move Right //If IR signal is received //move forward //Else //Jump back to top of loop Proximity Sensor (obstacle avoidance mode) (I might either use the one from Lego kit or buy a separate one ) //Import Library //Declare Pin for proximity sensor //While Loop: Send out sonar(echolocation or whatever) every second //Is there any obstacle?   //Yes, turn right so many degrees, and go back to while loop   //No, move on forward at set speed //If you’re surrounded and cannot exit send out a message through flashing LED's ________________________________________________________________________________________________________ I'm not asking for the code or for any of you to do all my stuff for me, I'm just asking for direction and resources. Thank You

Topic by Dark_Pheonix   |  last reply


How to convert a jpeg format picture to DICOM format??

I have the hard copy of an MRI ( it's in xray sheets). Unfortunately I don't have it in a CD. I need to send this abroad but I can't send the x-ray of the MRI just in case I need it here. I have taken pictures of the x-ray using a light box. Now I have been asked to send the pictures in DICOM format. I have no idea how that is done. I have about  5 x-ray sheets and in each there are about 29 pictures. I have taken individual pictures of each and every picture. Can someone please help me to achieve this? I need to do this ASAP! Thanks

Topic by shazni   |  last reply


Any recommendations for/against PDF to Word converters?

I need to convert an existing PDF (LaTeX source) document into MS Word format. A simple Google search (http://www.google.com/#hl=en&q;=convert+pdf+to+word) brings up a number of options, both Web based and installable. Having never done this before, I have no sense of good, bad, dangerous, crappy, whatever.I'd very much appreciate input from any experts who have done this before (Jake?), especially Macophiles.

Topic by kelseymh   |  last reply


push button contacts fail

Hi, i disassembled my full-automated coffeemachine as the push buttons for programs failed. The buttons are a line of rubber and the contacts on the platine are toothed while each rubber contact got tiny plates that bridge the contacts on the platine. I guess that the contact plates lack of conductivity - any suggestions what i can do to improve the conductivity? I thought bout buying contact foil and glue it over the rubber contacts, but i don't know, if this is the best solution.

Topic by Luziviech   |  last reply


Arduino And Servo

Hi..  i want a motor which can drive my robot at humans normal walking speed.. and also whose speed can be controlled dynamically.. Can anyone plz suggest me such servo or any dc motor.. motor should be compatible with arduino uno..?? 

Topic by amolamol   |  last reply


Voice changers

I know voice changers have been done, but theres only 2 instructables for some rather simple changers and other forum queries are quite old. What I'm looking for is a diy, real time voice changer circuit that can alter pitch and modulation, preferably with pots for fine tuning rather than presets, hopefully without the tinny sound I hear from the majority of samples I've listened to. An amped output with volume control would be cool too to overpower the users voice a bit easier. I'm looking for an output akin to this as an ideal. https://www.youtube.com/watch?v=Dqr5K0K4wL4 I'm no stranger to micro electronics, I can read codes and, with a little review, understand gates and ICs but still have no clue how to design my own circuits to do more than flipflop and turn things on and off. Any ideas ? Kits, DIY plans etc ? Simple and portable is better, want to incorporate it into a costume.

Topic by Silence   |  last reply


Rerouting electricity

Hello. I have an apartment with no ceiling lights. I want to reroute electricity from the outlets to the ceiling. Is there anyway I can do this without breaking the wall or using molding? I basically want to get my wires together, electric tape them in place, plaster and paint over them. I was told to do it with surface wires but i cant find any more info. Help!

Topic by NataliN   |  last reply