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Electric Instrument

So I am a big fan of music, making and listening to. i like to make instrument also because i like the though of making something pleasing to the ear with my bare hands. I also am interested with electronics. So in conclusion i thought i would make a thread were you can post you ideas and answer questions about audio based technology

Topic by g-tech    |  last reply


Musical Instruments

Anyone here play an instrument?

Topic by sardines454    |  last reply


what instrument is this?

We all know girls just want to have fun, but from 1:00 to 1:50 what is the instrument that has its own solo? http://www.youtube.com/watch?v=OTtelwOgscM there is a bet on the answer going. but i think its a xylophone but a run through google shows no answer anybody know so they can help me out?

Question by slimguy379    |  last reply


a instrument of my own...

Ive been listening to quite a bit of 8-bit sounding techno and such. And i really wanted to know if there was a way to make a computer keyboard make diferent pitched "beep" and "boops" of sorts. is there anyway to do this? http://www.youtube.com/watch?v=_Twokr090WM

Topic by astrozombies138    |  last reply


Homemade instrument website

Hi there, hope you don't mind me linking to my website full of the weird/cheap homemade instruments i've been tinkering with for the past 2 years or so. I love to make new things from old things, so most of what I do comes from re-cycling, re-purposing and using scraps of materials. the website is here: http://vulpestruments.blogspot.com/  i'm hoping to put up more tips and tutorials on how to do certain things when it comes to amateur lutherierery. If anyone has questions or queries about any of it, i'd love to try and help out!

Topic by Vulpestruments    |  last reply


Homemade Custom Instruments?

Ok, I have a question. If my friend and I began to build unique cigar box, tin, and slide guitars, would people buy them? We would make them with much more craftsmenship than the ones I have previously build. We would take our time and do our best to make them playable guitars. Would anyone out there contemplate buying one for mabe $35-$50? They would be  similar to the links below. https://www.instructables.com/id/How-to-Make-an-Electric-Cigar-Box-Guitar-for-25/ https://www.instructables.com/id/Cigar-Box-Guitar/ https://www.instructables.com/id/3-string-slide-guitar/ https://www.instructables.com/id/My-Cigar-Box-Guitar-with-cigar-box-amp/ https://www.instructables.com/id/My-First-Box-Guitar/ Also, we would probably sell through craigslist or ebay, maybe even using youtube or instructables to get the word out. If you are interested, contact me because we will be making these plus other products.

Topic by freeza36    |  last reply


Will this experimental musical instrument work?

So I got this brilliant idea to try and make an instrument out of PVC that can play two or maybe three notes at once. Problem is, I don't know if it will work. The sax mouthpiece would produce one note and the two recorders another. Will the recorders even make noise from the air that it gets from the sax mouthpiece? Or should i just ditch the sax mouthpiece and have the two recorders being played? Even if it did work, I would only be able to play a really simple song with only three harmonized notes.

Question by masterbuilder    |  last reply


new/strange instrument ideas

I am starting a band somewhat ethereal and experimental ( think sigur ros meets nine inch nails). I like interesting instruments and strange sounds. Any ideas?

Topic by youknowwhoiam    |  last reply


Rock Music on Classical Instruments?

For our spring orchestra concert at my school, I convinced my teacher to pick an arrangement of 21 Guns by Green Day as one of our pieces. Why pick 21 Guns over Don't Stop Believing? Because I like it better. THAT's why :P So...I was wondering. Has anyone else played an EPIC rock/punk/alternative or just something totally UN-CLASSICAL on a classical insturment? Perhaps something as awesome as a Green Day song? I play violin btw xD

Topic by CamillaLuvzMusic    |  last reply


Instrument Topics of All Kinds

Hi all! I'm new here...nice to meet ya'll! I think I get how this site works, and it seems really awesome! Who needs the DIY network when you have a whole online community :D Anyway, this forum seems to be for sharing personal endeavors, correct? Well there's this blog. It's not completely mine....it's a company blog. It has SO MANY how-to posts about mainly reed instruments, reed-making, and all sorts of things. That makes it relevant to a niche community, which may or may not be here on instructables? I just hope there's some oboist or bassoonist out there that I'm helping by posting this :] It's called the Midwest Musical Imports Blog. Yes, there are a couple self-promoty type posts on it (it's a company blog, afterall). But a majority of it is how-tos and instructions and such. Am I right to post this here? Please tell me if I'm in the wrong! Thanks everyone! - J. Doorn

Topic by jdoornink  


A Question about music instrumental

Hi I want to make a device that have 1 input of microphone jack and have 2 output,one for headphone and second for microphone again (so i can connect it to computer for recording).Why ? Because when I enable the function on Adobe Audition CC (Program of Computer for recording) that I hear the microphone voice on headphone,It is a kink of disorganized I mean that the voice on headphone has delay about 1 second or less than 1 second but it make Confuse a person.So I think that when the voice come on a device and it mix and shoot on headphone directly it will not delay and it must shoot the voice on 2 outputs, one for headphone and second for PC for recording.I know that it is the Audio Mixer works but Audio Mixer is a little bit expensive and I think that is it possible to make this device at home ???with Best Regards ...

Question by AdeebPopalzai  


Help selling unique instruments?

Ok, I have a question. If my friend and I began to build unique cigar box, tin, and slide guitars, would people buy them? We would make them with much more craftsmenship than the ones I have previously build. We would take our time and do our best to make them playable guitars. Would anyone out there contemplate buying one for mabe $35-$50? They would be similar to the links below. https://www.instructables.com/id/How-to-Make-an-Electric-Cigar-Box-Guitar-for-25/ https://www.instructables.com/id/Cigar-Box-Guitar/ https://www.instructables.com/id/3-string-slide-guitar/ https://www.instructables.com/id/My-Cigar-Box-Guitar-with-cigar-box-amp/ https://www.instructables.com/id/My-First-Box-Guitar/ Also, we would probably sell through craigslist or ebay, maybe even using youtube or instructables to get the word out. If you are interested, contact me because we will be making these plus other products. We may make guitar hero ukuleles, guitar pedals, and nixie tube clocks.  

Question by freeza36    |  last reply


What Instrument do you play? Answered

I play the tenor saxophone.

Question by shadowninja31    |  last reply


What instruments do you play?

What instruments do you all play? i play guitar, piano, and used to do recorder.

Topic by knex gun builder freak    |  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


is their any instrument based on radar with robotics?

Is their any instrument based on radar with robotics?

Question by rkbalaji112    |  last reply


Mathematical formulae and wind instrument help.? Answered

Is there a mathematical formula for the arrangement of hole on a flute or better a recorder. In addition has anyone every tried to make a saxophone mouthpiece   ? I am interested in trying to make a DIY version of a Xaphoon http://www.youtube.com/watch?v=j3Wnx2VYZq8

Question by rickharris    |  last reply


Acoustic instrument with added speaker in the Body?

Hi... :-) I am in a mariachi band and play an acoustic instrument called a guitarron. Sometimes at gigs it is too noisy or too large a venue that it is difficult to hear the acoustic instruments and singer w/out mics and would like to try and make my guitarron into a portable speaker system which has ample space to add hardware. I am looking forward to reading all the fantastic, innovative ideas (even the sarcastic with, if any), but would like to:  *Keep the weight at a minimal level (as I will be carrying my instrument)  *Allow inputs for a mic and 1/4" jack (1/4" my guitarron has thanks to an "instructables user", which works great!)  *Allow for mp3 input  *Battery powered, if possible Also the speaker will have to be small to fit through the sound hole, but if needed for better, louder sound I can make an opening to the body to allow for a larger speaker. And if anyone has any other suggestions or a similar idea to what I want to achieve, please post it... Thanks to all who have taken the time to read my project idea!!! Hopefully it is possible and not too far-fetched...

Topic by Karma213    |  last reply


some new and advance instrumentation project on which i can work.?

Any instrumentation project. any advance instrument whose principle is applicable . the instrument should make the work of people much easier..

Question    |  last reply


How do you make a clarinet mouthpiece?

The image will help give an idea of what it looks like. Be sure it works by inserting a reed in the mouthpiece and blowing in it. Thanks for listening!

Question by NJ94    |  last reply


What is the best way of making an electric instrument?? Answered

I am making a musical instrument for a school project and i need something to adjust the volume and/or pitch, but i don't know what to use. I am only 13 so i have little resources and no money to spend so i was considering using a single wire and a guitar pickup (not actually a guitar pickup, a speaker backwards) and i want to know what the pros and cons of this method are and whether or not there is a way of making a dimmer switch. Thankyou in advance. P.S. Once i have a good idea i am going to plan it and take lots of photos and if it works i will post an Instructable. P.P.S. Everyone in my form at school is saying there making a rainmaker and guitar with elastic bands so I'm gonna really enjoy seeing there faces if this works!!! P.P.P.S. Should i have written P.S.S. and P.S.S.S etc.?

Question by avwos    |  last reply


Music made from ONLY Carboard Instruments

What can i say, I love this type of thing.

Topic by laminterious    |  last reply


Any page for DSP(texas instruments) tutorials?

If you can help me find a page or resources for information on dsp programming techniques or projects teaching how to use these DSPs.

Question by betorre    |  last reply


How can I make this kind of instrument?

So when i first saw this video I fell in love with this stuff... so any ideas and schematics? http://www.youtube.com/watch?v=8GogESHWz6U

Question by Stormrage    |  last reply


REQUEST: How to build hardcases for various instruments?

I'd realy like someone to show different types of homemade hardcases, and how to go about making one of your own. Thanks in advance. :)

Question by bored-silly    |  last reply


5 gallon bucket acoustics

Hello, I have made a bass out of a 5 gallon bucket and I was wondering how to improve acoustics without a microphone or sound system...

Topic by YoloPeeps  


Finding a certain size case

Anyone know where i can get a case (empty or made for it) that is 24"X4"X4"? cause im trying to restore an old metal clarinet and the case that came with it is shot. anyone know where i can get that size case (if so, with a bag built into it or some kind of compartment inside the case)?

Topic by KT Gadget    |  last reply


is it possible to turn a morse code sender into a electric instrument...

Is it possible to turn a morse code sender into a electric instrument... by using a 1/4" inch jack and momentary switch? Maybe with a battery pack attached and a few resistors?

Question by Silverpoint    |  last reply


What musical instrument(s) do you play?

What instruments do you play? How well? What inspired you? ect.

Topic by ArcticChill    |  last reply


How to wire a guitar pickup to instrument cable/ rheostat?

I have been wanting an acoustic pickup but don't really want to buy one. I had an old tele neck pickup with a white and red wire and an instrument cable that has one jack taken off and the ground and hot contact exposed. I tried different configurations of the red and white wires to the hot and ground of the instrument cable but all it did was stop buzzing and no sound came out. I think I might need a volume and i have a leftover rheostat but I'm not sure how to wire it, If I could avoid wiring a volume completely and just go from pickup to cable that would be great but I'm not sure how. Help please??

Topic by beardedknome    |  last reply


Top Homemade Instruments to Form Your Own Band

I just saw an awesome list of homemade instrument Instructables on a music blog called Terrible Love Songs - check it out! I've been in a couple of bands and have always tinkered with the idea of making my own instruments. Unfortunately they have never held together for long enough to take photos of (that's the bands and the instruments).Here are 6 instruments that don't look impossible to make and could start you off on your journey to discover the talent within.A Rule Organ"Hold the rule to the desk as tightly as possible to produce the best audio fidelity (read: twang) possible."Miniature Washtub Bass Made From Office Supplies"This is a great time killer and will probably annoy your co-workers (unless they've already made one themselves!)"Lap Steel Guitar out of a Pool Cue Case"string her up and plug her in! You'll need to play her using a guitar slide, or, to complete that bar room blues look, a shot glass."Cookie Tin Tambourine (Good name for a band)"Just find someone to join you in eating the cookies and emptying the bottles and it will be a very enjoyable evening."Horn From A Drinking Straw"The sounds produced range from a duck call to a flagulent."Cookie Tin Banjo"These banjos are fretless. I was surprised how easy they were to play."How To Write A Song"Even if the world doesn't get to hear it, you'll know that you did good work, and that's fulfilling enough to be well worth the attempt. Right?"How To Rap"like snoop dawg lol so to rap you need little diction and not a lot of pronunciation"Now you have no excuses. If you do manage to become famous (or not), please remember where you came from and post a video in the comments box.

Topic by canida  


500W electric scooter control and instrumentation with Arduino mega

1. Introduction DC 500W motor control with an Arduino mega to limit starting current and to vary the speed of the scooter. The battery is in 24V, 10A.h. The following table summarizes their characteristics: https://i58.servimg.com/u/f58/17/56/35/17/a014.jpg https://i58.servimg.com/u/f58/17/56/35/17/a111.jpg 2. Bibliography: Link download : sketch_escooter_feed_back_reel_V1.ino https://drive.google.com/file/d/0B_fB3GAsM02FSlRTWHdyRkhuUW8/view?usp=sharing escooter_ampli_SIMULINK.mdl https://drive.google.com/file/d/0B_fB3GAsM02FOW9OdmlhdDhJZGc/view?usp=sharing escooter feed back ISIS.DSN https://drive.google.com/file/d/0B_fB3GAsM02FOXdRWFN5OWRMQkE/view?usp=sharing youtube  :  "study trotinette electric e-scooter 100W et 350W, wiring"  youtube https://www.youtube.com/watch?v=QqJ2-YiE8Tg&index;=75&list;=PLfZunVn_gcq7EOurXuWU2sRFmh6CbiUiL Article: «Study of electric scooters 100W and 500W (Arduino), Revue 3EI 2017» Pdf? Book «I realize my electric vehicle» at DUNOD 3. Open loop program To test the programming, we simulate the program in ISIS, as can be seen in the following figure. In addition, we have an LCD display to display data (duty cycle corresponding to the PWM at 32Khz, motor current, motor voltage, action on the pushbuttons, 4 push buttons are used. BP1 to manually increment the duty cycle, BP2 decrement it. BP3 set the duty cycle to 0, corresponding to the brake contact. The speed of the motor is practically proportional to the duty cycle https://i58.servimg.com/u/f58/17/56/35/17/a211.jpg We made our own current amplifier called a step-down chopper but it is possible to buy a shield There are many cards for Arduino to control DC motors especially of low powers and also of great powers as can be observed on the following links.http://www.robotpower.com/products/MegaMotoPlus_info.html http://www.robotshop.com/en/dc-motor-driver-2-15a.html https://www.pololu.com/file/0J51/vnh3sp30.pdf https://i58.servimg.com/u/f58/17/56/35/17/a310.jpg But all these chopper shields measure the current internally but there is no current limitation. In order to have a current limitation, an analog current loop is required using specialized AOP or IC or a fast digital current loop. But what should be the value of the limitation current? The choice of the current value is normally for the 1-hour operation service in order to be able to carry out relatively long climbs without reaching the critical temperature of the engine. In our case, the limitation current must be Limiting motor = Power / Upper battery = 500W / 24V = 20A In addition, the power transistor of the chopper can only support 50A in our case. But in open loop, it has no current regulation, so as not to exceed the maximum current, a ramp of the duty cycle will be used. A 0.1 second interruption routine will be used to measure the voltage of the current (sample measurement, sample). This sampling time is arbitrary but does not allow to be faster than the rise time of the current because the electric time constant of the motor is L / R = 1.5 ms. Open loop operation with a 25.5s (8bit) ramp and 0.1s interrupt routine provides a good understanding of the operation of a DC motor drive. The display will only be done every 0.2s to have a stability of the digits on the screen. In addition, a digital filtering will be done on the current and the voltage on 4 values therefore on 0.4s. [b] Algo open loop [/b] Interrupt Routine All 0.1S Read voltage and current Loop loop (push button scan) If BP1 = 1 then increment PWM If BP2 = 1 then decrement PWM If BP3 = 1 then PWM = 0 Displaying variables every 0.2s Code: [Select] // include the library code: #include #include #include #define SERIAL_PORT_LOG_ENABLE 1 #define Led     13       // 13 for the yellow led on the map #define BP1     30       // 30 BP1 #define BP2     31       // 31 BP2           #define BP3     32       // 32 BP3 #define LEDV    33       // 33 led #define LEDJ    34       // 34 led #define LEDR    35       // 35 led #define relay   36       // 36 relay #define PWM10    10      //11   timer2    LiquidCrystal lcd(27, 28, 25, 24, 23, 22); // RS=12, Enable=11, D4=5, D5=4, D6= 3, D7=2, BPpoussoir=26 // Configuring variables unsigned   int UmoteurF = 0;  // variable to store the value coming from the sensor unsigned   int Umoteur = 0; unsigned   int Umoteur2 = 0; unsigned   int Umoteur3 = 0; unsigned   int Umoteur4 = 0; unsigned   int ImoteurF = 0;  unsigned   int Imoteur = 0; unsigned   int Imoteur2 = 0; unsigned   int Imoteur3 = 0; unsigned   int Imoteur4 = 0;            byte Rcy=0 ;    // 8bit duty cycle unsigned    int temps; // the setup function runs once when you press reset or power the board void setup() {   pinMode(Led, OUTPUT);   // Arduino card   pinMode(LEDV, OUTPUT);   pinMode(LEDR, OUTPUT);   pinMode(LEDJ, OUTPUT);   pinMode (PWM10,OUTPUT);     // Pin (10) output timer2   //  digitalWrite(LEDV,LOW);   Timer1.initialize(100000);         // initialize timer1, and set a 0,1 second period =>  100 000   Timer1.attachInterrupt(callback);  // attaches callback() as a timer overflow interrupt   lcd.begin(20, 4);    Serial1.begin(9600);   TCCR2B = (TCCR2B & 0b11111000) | 0x01;         //pin 10  32khz    http://playground.arduino.cc/Main/TimerPWMCheatsheet                                                   //http://www.pobot.org/Modifier-la-frequence-d-un-PWM.html   //   analogWriteResolution(bits)      https://www.arduino.cc/en/Reference/AnalogWriteResolution lcd.setCursor(0,1); lcd.print("Rcy"); lcd.setCursor(10,1); lcd.print("Um"); lcd.setCursor(5,1); lcd.print("Im"); lcd.setCursor(10,1); lcd.print("Um"); lcd.setCursor(20,1); // 4 lines display * 20 characters lcd.print("BP1+"); lcd.setCursor(25,1); lcd.print("BP2-"); lcd.setCursor(29,1); lcd.print("BP3=0"); } // Interruptions  tous les 0.1s void callback()  { temps++; //toogle state ledv for check   if ( digitalRead(LEDV)== 1 ) {digitalWrite(LEDV,LOW);}     else {digitalWrite(LEDV,HIGH);}     analogWrite(PWM10,Rcy);   // frequency Umoteur=analogRead(A0); Imoteur=analogRead(A1); Imoteur2=Imoteur; Imoteur3=Imoteur2; Imoteur4=Imoteur3; ImoteurF=(Imoteur4+Imoteur3+Imoteur2+Imoteur)/4 ; Umoteur2=Umoteur; Umoteur3=Umoteur2; Umoteur4=Umoteur3; UmoteurF=(Umoteur4+Umoteur3+Umoteur2+Umoteur)/4 ;   }// End routine // Loop corresponding to main function void loop() {    // BP + LED   if ((digitalRead(BP1))==1) {     lcd.setCursor(20,0);      // Column line     lcd.print("BP1");     digitalWrite(LEDR, LOW);        digitalWrite(LEDJ, LOW);     Rcy++;                        // PWM incrementation     if ( Rcy>254)  {Rcy=254;}     delay(100);               //8bits * 100ms = 25S increment 25ssecond slope     }        if ((digitalRead(BP2))==1) {     lcd.setCursor(20,0);     lcd.print("BP2");             Rcy--;      if ( Rcy<2)  {Rcy=2;}  // PWM almost at 0, engine stop         delay(100);      digitalWrite(LEDR, HIGH);     digitalWrite(LEDJ, HIGH);     }   if ((digitalRead(BP3))==1) {     lcd.setCursor(20,0);     lcd.print("BP3");      Rcy=2;               // PWM almost at 0, engine stop     } if (temps>=2)  { lcd.setCursor(0,0); lcd.print("                "); // Erase line lcd.setCursor(0,0);     lcd.print(Rcy); lcd.setCursor(5,0); ImoteurF=(ImoteurF)/20;     //resistance (5/1024)*(10/0.25ohm) si ACS712 66mV/A                            // For resistance 1ohm (ImoteurF) / 20; Simulation 5/25 lcd.print(ImoteurF); lcd.setCursor(10,0); UmoteurF=UmoteurF*10/38;                              //10/38   10/30 simula if (Umoteur>ImoteurF){UmoteurF=UmoteurF-ImoteurF;  }  //U-R*I lcd.print(UmoteurF); temps=0; }// End if time    } // End loop https://i58.servimg.com/u/f58/17/56/35/17/dsc_0614.jpg Since there is a limit of 9000 characters in the forum below Open loop program feature previous The interrupt routine lasts only 250 microseconds, the loop of the main program which scans the action of push buttons is 13micros and the display time of all data is 11ms. Thus, it is possible to improve the sampling period and thus the speed of the regulation of the current. The Arduino makes it possible to make the instrumentation of the scooter so to know the power, the consumption in Ah and Wh, to measure the speed, to know the consumption according to Wh / km, to measure the temperature of the engine, Have a safe operation. But for now we will see how to limit the current 4. Closed loop program, limited current control The sampling period will increase to 0.01 seconds (interrupt routine) If the current is less than the desired value, then the duty cycle can be increased or decreased to the desired value which is the setpoint. On the other hand, if the motor current is greater than the limiting value, there is a rapid decrease in the duty cycle. So as not to exceed the value of the duty cycle if it is saturated to 254 maximum and to the minimum value 6. Code: [Select] if (Imoteur<4000)                    // No current limitation at (20A * 10) * 20 = 4000   {if (consigne>Rcy)   {Rcy=Rcy+1;}   // Pwm ramp + 1 * 0.01second pure integrator    if (consigne    if ( Rcy>254)  {Rcy=254;}           // Limitation of duty cycle    analogWrite(PWM10,Rcy);   // Frequency 32kHz timer2}         } if (Imoteur>4000)  { Rcy=Rcy-5;              // No current filtering, to be faster                     if ( Rcy<6)  {Rcy=5;}       // Rcy is not signed, nor the PWM therefore Rcy minimum must not be less than 6                   analogWrite(PWM10,Rcy);   // Frequency 32kHz timer2}                        } 5. Closed Loop Program, Limited Current Control with Acceleration Handle An acceleration handle provides a 0.8V voltage when not operated and a 4.5V voltage when the handle is fully engaged. Instead of using pushbuttons to increase or decrease the speed setpoint, an acceleration handle will be used Code: [Select] Upoignee=analogRead(A3); // The relation in Upoign and the setpoint which corresponds to the duty cycle corresponds to if (Upoignee>100) { consigne=(Upoignee/2);     //0=a*200+b    et 255=a*800+b                      consigne= consigne-100;                   }                            else { consigne=0;   }               if (Upoignee<100) { consigne=0;  }     // redundancy     6. Temperature and safety program of the motor with the current measurement The outdoor temperature measurement can be easily performed by the LM35 component which charges 0.01V by degrees Celsius Code: [Select] temperature=analogRead(A2); //lm35 0.01V/°C temperature=temperature/2;       // Temperature coefficient lcd.setCursor(5,2); lcd.print("      "); lcd.setCursor(5,2); lcd.print(temperature);   // Display in ° C lcd.setCursor(9,2);      // Erasing secu display lcd.print("     ");   if (temperature>80 ) {lcd.setCursor(9,2);         // If motor external temperature is above 80 ° C                      lcd.print("secuT");                       Rcy=0;} In addition, thermal safety by measuring the motor current will be added. If the limitation current is greater than 10s then the motor will no longer be powered for 30s. A "secu" display will appear on the LCD display. This safety makes it possible to cut the motor on slope too high and when blocking the engine but it would be necessary to add the measurement of the speed in the latter case Code: [Select] if (timesecurite>=10000 ) {flagarret=1;      // If limitation current for a current of more than 10s                               timerepos=0;                               consigne=0;                               Rcy=0;                                 timesecurite=0;}       //   Then stop engine during a downtime    if (flagarret==1 ) {lcd.setCursor(9,2);         // If limiting current for a current of more than 20s                      lcd.print("secU");  }     //   Then stopping the motor for a stop time and display                                                     if (timerepos>=30000 &&  flagarret==1) {flagarret=0;                                           lcd.setCursor(9,2);      // After a rest time here of 30s                                            lcd.print("       ");   }   The display can be observed if the temperature is above 80 ° C https://i58.servimg.com/u/f58/17/56/35/17/a017.jpg Thermal safety by measuring the motor current (digital thermal relay) which allows to know the image of the internal temperature of the engine would be ideal. But for this, it is necessary to know well the thermal modeling of the motor. 7. Measurement of the energy capacity of the battery The energy capacity of a battery is in A.H, we will display the value in mA.H to have a high accuracy. The capacity will be in A.Second in the following equation. So to have in mA.H, it will be divided by capacity by3600. Capacity (A.s) n = I * Te + Cn-1 with Te = 0.01s and I multiplied by 10 So in the interrupt routine Code: [Select] capacity=ImoteurF+capacity ; And in the display Code: [Select] lcd.setCursor(0,3); // Display of energy capacity lcd.print("C mA.h="); capacity1=capacity/(18000);   //18000=3600*5  5=> Current measurement coefficient lcd.print(capacity1); To check a current of 10A with an adjustable resistor and after 30s, the capacity must be 83mA.H 8. Power and modeling with SIMULINK Modeling helps to understand the vehicle and its control. In addition, it is possible to compile the control part directly into the Arduino program from simulation under Simulink. But it will not be possible to simulate the instrumentation with the LCD display. In the following figure, we can observe the simulation of the programming of the chopper with the current limitation with Simulink. In the following figure, the green box shows the duty cycle control to vary the speed and the red border the current limitation. The controller of the control is here a simple integrator but it is possible to carry out a multitude of control. https://i58.servimg.com/u/f58/17/56/35/17/azub_c15.jpg In the previous figure, it can be observed that the current is well limited to 25A from 2s to 9.5s. Then, the current reaches 10.8A under established speed regime at 22.5km / h. The dynamics are similar to the tests carried out. With a slope of 5%, the cyclic ratio reaches only 100% as can be seen in the following figure. The speed will reach painfully 19km / h with a current of 24A and a motor power of 580W. See article: Study of electric scooters 100W and 500W (Arduino), 9. First conclusion It is easy to control a 500W DC motor with an Arduino and some components So repair many scooters that are in DC motors. But it takes some knowledge (automatic, engine) to know how to properly manage the engine and limit its current so as not to damage it The display of the speed, the distance, the operating time to know the Watt.km / km can also be realized with a menu 2. The .ino program as an attached file, But it is not possible to put an attached file in ISIS electronic labcenter? What is this forum? It would be desirable that the compiler could generate the.cof to debug in Isis and test the program line by line .... Arduino still has to make a lot of effort to be on the same level as other microcontrollers 10. speed measurement (tachometer) Velocity measurement is carried out using a hall effect sensor SS495 or A1324 which counts each revolution of the wheel. It is enough to enter the perimeter of the wheel of the scooter (130mm of radius therefore 0.816m in the case To have the speed, it is enough just to divide the number of turn of wheel on an arbitrary time of 1s to have a minimum speed of 0.81m / s therefore of 2.93 km / h. In addition, an average filter with 3 values will be used to display the speed. At 25km / h, there will be 8.5 laps. To count the turns, an external interrupt routine will be used on input INT0 21 of the mega card. http://www.locoduino.org/spip.php?article64 To simulate the speed, a pulse on input 21 will be used with a duty cycle of 10%. https://i58.servimg.com/u/f58/17/56/35/17/a018.jpg Code: [Select] void INT0b21() {   Tspeed++;   // External interruption to count the number of turns } // In the set up declare the interrupt routine when the 5V edge of the magnet detection is done   attachInterrupt(digitalPinToInterrupt(21), INT0b21, RISING );  // External interruption // In loop if (temps09>=5)  {        // 1 second loop lcd.setCursor(13,2);      // Erasing speed lcd.print("kph     "); lcd.setCursor(16,2); speed1=Tspeed*2937;      //1tour*816*3.6/1s=2.937km/h speed2=speed1;           //Tspeed (rate/seconde) speed3=speed2; speedF=(speed1+speed2+speed3)/3000;   // To put in kph lcd.print(speedF,1);    // Display to the nearest tenth Tspeed=0;   // Reset counter temps09=0;  //reset time } To improve the accuracy of the velocity measurement, it is possible that the sampling time of the velocity measurement is dependent on the velocity. For example: For speeds less than 10km / h sample at 1second, but above 10km / h sample at 2 seconds. 11. Distance measurement for autonomy The distance corresponds to the total number of turns of the wheel multiplied by the perimeter of the wheel. So do not set the number of turns to 0 for each sample. On the other hand, the reset of the distance will be done when pressing the reset of the Arduino Mega. The distance display will be displayed to the nearest second. At 32km / h, it will take 2 minutes to do 1km as can be seen in the following figure: https://i58.servimg.com/u/f58/17/56/35/17/a019.jpg Code: [Select] void INT0b21() {   Tspeed++;   // External interruption to count speed   nbrRate++; } lcd.setCursor(13,4);      lcd.print("km      ");  // distance=(nbrRate*816)/1000;  //distance m distance=distance/1000;  //distance km lcd.setCursor(15,4);      lcd.print(distance,1);  You can observe the electrical installation with the chopper, the arduino, and the display when the program is set up https://i58.servimg.com/u/f58/17/56/35/17/dsc_0613.jpg 12. Synthesis The RAM space is used only at 4% and ROM space at 3%, for an Arduino mega. So we could take an arduino a little smaller. But, there are 8 Lipo cells to make the 24V power supply to power the engine via the chopper. Therefore, the voltage measurement of each element will be on the Arduino with a JST connector. This measurement makes it possible to know if a cell with an internal resistance which begins to pose a problem and to know if the balancing of each cell has indeed been carried out. It is possible to switch to 36V with 12 cells also with the arduino mega without using an external shield that multiplex 24 analog inputs on input A0 It is possible to send all data to a smartphone via Bluetooth HC06 via pins 20, 21, RX1 and TX1. But the application under android realized under JAVA Studio can not be shared on this forum. This part will not be explained. After having made the instrumentation of this scooter, a study should be carried out on the precision of the measurements, it is possible to read "Instrumentation of a low-power electrical motor vehicle" eco marathon "type Revue 3EI N ° 81, July 2015 http://www.fichier-pdf.fr/2015/09/07/instrumentation-vehicule-faible-consommation-eco-marathon/

Topic by Iutgeiisoissons  



Has anybody heard of a video series called handmade music? Answered

Hi, I was wondering if anybody had heard of a instructional video series called handmade music. It is about making musical instruments yourself. I have looked everywhere including rapidshare youtube. thanks

Question by nurdee1    |  last reply


What Do You Play

I just thought I would start off this by asking the members of this group and any others that are reading this what instrument they play or like and why? I play the tenor saxophone (first chair) at my local high school, where we have one of the top jazz bands in the state if not farther out. I've been playing tenor since the end of 5th grade, I am currently in 10th. This means I've had some time to practice.

Topic by Dr.Paj    |  last reply


how do i make an instrument out of junk with different timbres (sounds)?

How do i make an instrument out of junk with different timbres (sounds) for a school project? i was thinking a shoebox with elastic bands and a rainmaker attached. and maybe some sandpaper i can scratch... 

Question by x-mcfly-x    |  last reply


How can I create a musical instrument out of junk?

It's a project for physics, and it sounds impossible. I also have to play it in front of the class and have a written component with an explanation on what resonance is occurring. No electric instruments. Objectives: 1. Construct a musical instrument out of junk and common materials such as plastic pipe, wood, glass, metal scrap, etc. 2. Demonstrate and explain physics concepts inherent in your instrument. Rules: 1. The instrument must be able to play an octave in tune to receive a B grade. The A grade is reserved for truly amazing instruments in terms of thought and construction, so my challenge to you is to WOW me. 2. The instrument must be able to play a song. Songs such as “Mary had a Little Lamb” or “Twinkle Twinkle Little Star” are not adequate since they do not include all the notes in an octave. 3. No Kazoos, Jew’s Harps, Pop bottles filled with water, musical saws, washtub basses etc. When in doubt – ask. 4. This is a high school level assignment, so I am expecting high school level (or above) projects at an appropriate level of difficulty. 5. Grading will be based on • # of notes played • ability to make your instrument resonate • appropriate difficulty of the instrument construction • your song of choice in an auditory presentation to the class and an explanation of the physics behind your instrument • creativity of course. Stringed instruments must have more than one string.

Question    |  last reply



What kind of stringed instrument should I get next?

I already own 4 guitars and a ukulele, so I'm looking for something different to play. I only have about $100 to spare, so cheap is best. Any suggestions/wisdom is appreciated, and please list a few pros/cons also. Thanks.

Question by nickodemus    |  last reply


Steampunk Harp

Anybody seen any of these or care to make an instructable for an orchestral steampunk harp? As cheap as possible, but decent sound quality, please.

Topic by Dutch Holland    |  last reply


Position lock free stop seam type hinges

I am working on mechanical hinges. It's a case design for mobile along with hinge.i need some input regarding position lock seam hinges like the one shown in attached images/i am designing this case for ipad/tab.How exactly these hinges works ? and i need internal 3d model of these hinges? how exactly it look from inside? and what is prefered manufacturing method for making these type of objects ?

Topic by adityay17    |  last reply


Lute making problems?

In my engineering class in high school I am being tasked to create a lute as a final senior project. I have done some research in to making a lute and have found a lute CAD generator which has helped me so much I'll be using a CNC to create most of the parts. The issues I'm running into currently are: what thickness and type of wood should i use for the body creation, and how should is keep the wood i place after its steamed and formed?  thank you 

Question by Travpena    |  last reply


Cool Vibraphone Project - selling partially completed project and parts

I've gotten halfway through this project and my son has lost interest http://www.buildavibraphone.com/get_vibraphone_plans.html#faq Would like to find a good home with someone interested in completing it. Frame is built, PVC tubes cut and tunes, metal bars cut (but not tuned). Have all remaining parts. High quality project, over $1000 in parts cost. Make me an offer - I need to get this stuff out of my garage. In San Francisco Bay area, California

Topic by Beevis2    |  last reply



HELP WITH COMPLETING THIS PROJECT PLEASE

Hi all. I live in Spain, where lack of earthing and other circuit protection for musicians is a real issue (as I am sure it is elsewhere too), especially when playing live when little attention has been paid to such necessities, and where the lack of earthing causes mayhem with the sound, leaving the guitars and mikes dangerously exposed to any electrical faults which might arise. On a recent visit to South America this came to a head for me after a disastrous live gig where I was almost electrocuted, and where the live sound was terrible due to lack of earthing, and I decided to seek help in designing a system for musicians to prevent injury or death.  So after some time spent researching on various online forums, I designed a prototype which I was using during my stay in South America, but I never managed to get beyond that point for lack of materials, and I have the same problem here in Spain. The other problem is that I had to use the materials available to me, which were more suitable to the US systems than the European ones, but that is a minor issue as the circuit breakers are probably the same anyway. However the quality and finish of the materials is questionable.  So what I could do is describe and photograph what I have put together, in the hope that someone will be able to help me find a way to house it all in a compact professional looking container. Please be aware however that it is in a very crude form at present, although it does what it was intended to do - if water enters any of the wiring one circuit breaker cuts the current, and if there is a short, another circuit breaker kicks in. It is basically the same system currently used in buildings for circuit protection, but adapted for portable applications.  Then I have a makeshift earth which connects to the earth lug of the plug adaptor, and this is connected to a metal pipe or tap, or whatever can be found of that nature which runs to ground to provide an earth for the system. This was not always possible, but certainly when it did work it reduced the 50 cycle hum which played havoc with the sound of the audio system and reduced the tingling in the guitar strings enough to be able to play.  Originally, I intended  incorporating this isolating system into a typical guitarist's floor pedal board, but that did not work out because this system is more than a little unwieldy, although I am still up for that idea. I have never tried to do an instructable, but I think that this is vitally important to musicians, and could certainly save lives, and so far I have seen nothing of this nature on the site and feel that it is crucial that someone provides this information. So......anyone interested? I am basically seeking those of you who are more technically skilled than myself, and with more ideas of how to actually fabricate the sytem. It is really pretty basic - what is important is that it should be light, portable and easy to set up quickly. The wires are a problem, because they need to be sufficiently thick to carry the necessary current rating for the equipment connected to the circuit - basically all the band equipment, or at least a guitar rig.  Thanks for your time.

Topic by truthseeker57    |  last reply


What are the instruments used primarily in Medieval-style music and what are modern sound equivalents? Answered

When I say sound equivalents, I mean what instrument sounds most like it, not like "this instrument is closest to another because it is in the same class." I am asking because I want to synthesize the instruments for a movie soundtrack. Also, if someone would suggest a (free?) imitative synthesis generator vst (FL Studio compatible?) plugin, I would be willing to listen!

Question by AlternateLives    |  last reply


Are there any instructions available to making your own Chinese musical instruments, namely the Guzheng?

Although I don't know how to make one myself, I just love the sounds the Guzheng produces and I was thinking of learning to play one but... the instrument titself seems expensive to even purchase so it kinda made me think and am now wondering whether anyone could simply make their own Guzheng? If is anyone has built one from scratch and for themselves can you share the instructions, on how to build one, with others?

Question by LittleRedDragon2386    |  last reply


How do you make a pressurized 2 litre coke bottle instrument

I have found this video on youtube of this guy who made an instrument out of 2 litre soda bottles. He says he drilled a hole in the cap and put a tire valve through the hole. Then he used silicone to seal the hole, screwed in onto the bottle, and pressurized it. Then he hit it on his hand and other various objects and it produced a very clear sound. I have tries to recreate this, pumping my bottle up to 120 PSI with no results. I noticed that he is from the UK and that his bottles were shaped differently than mine(from America), being more of an hourglass shape. Would this have any affect? Also i noticed that when i was doing it that there was a lower PSI(somewhere less than 100... mabye 80ish?) where i could hear a faint sound similar to in the video. Is it possible that I missed the correct PSI?

Question by canadianpyro24    |  last reply


Does any one have, or know where to find, how to build your own alphorn?

I've always wanted one, and sure as heck am not going to buy one. I don't have a lathe, so thats out as well. I've considered pvc, but i dont know.

Question by killimangnome    |  last reply


Trumpet cleaning question Answered

Alright, I own a cornet (which is basically a shorter version of a trumpet), and I wanted to know if it is safe to clean it with water or handsoap. I am not trying to make my instrument all nice and shiny, but I just want to clean all oil off of the valves and slides, so would it be safe to just use water and handsoap? Thanks in advanced

Question by stale56    |  last reply