Gibson Guitar Robot

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Yet another college project describing how Gibson Guitar works using a microcontroller to enhance its operations...

Text of Gibson Guitar Robot

  • 1. Yet another application of microcontrollersGIBSON GUITAR ROBOTTeam Sleeping Mode Abhishek Anand - BG107Cs003 Abhishek Mishra - BG107CS004Akash Gupta - BG107CS010 Manish Kumar - BG107CS062 Paramjeet - BG107CS080 Subhash Choudhary - BG107Cs119

2. The Problems of a Guitarist Tuning mechanism hasnt evolved much. Each peg is still turned manually to get the right tone. Factors like heat change the tone of strings. Stretched strings are very tough to keep in tone. People rely on software like Guitar Tuner Pro. Inconvenience. Lot of time gets wasted. 3. The Solution Gibson Guitar Robot 4. The Solution Gibson Guitar Robot End to manual peg twisting Automatic tuning in seconds! Accurate results Uses Microcontroller and Motors 5. Features Gibson Guitar Robot Dynamic Tuning Read and Right Speed Dial Switch Beats 200 tunings between battery charges 6. The Setup 7. The Setup MCK Master Control Knob adjusts volume normal function on pull becomes tuning selector LEDs show status of tuning shows battery level (1-10) 8. The Setup Charging System 2.4 V NiCd battery pack Stepped up to 12V to power other parts (motors etc) 90 minutes full charge 200 tunings per full charge 9. The Setup Powerhead Locking Tuners Rohm's BA6845FS motor drivers Rotates to pull strings for tuning RPM is reduced by ratio of 500:1 also works for manual tuning 10. The Setup Piezo Pickups detects frequencies feeds signals to Data Transmitting Tailpiece the signals are multiplexed into C8051F120 MCUs Analog/Digital input 11. The Setup Data Transmitting Tailpiece contains Silicon Labs C8051F120 12-bit MicroController uses crystal-derived reference frequency, to decide if strings frequency is flat, sharp or on pitch. depending on the strings frequency, controls the motors in tuners 12. Silicon labs C8051F120 12-bit High Speed 8051 uC core 100 MIPS Mixed-Signal with 64 I/O Lines 5 Timers + 1 Watch Dog Timer 128K Byte In-System Programmable FLASH 256 Bytes RAM 8K Bytes XRAM 2 UARTS Supply Voltage 2.7V 3.6V 13. Working #1 Master Control Knob is pulled up this enables the C8051F120 unit lets user load a preset 14. Working #2 Pickup detects frequencies converts string vibrations into frequencies multiplexes all 6 string frequencies feeds them to C8051F120 s input 15. Working #3 Tailpiece (MCU) analysis C8051F120 MCU analyses the signals from pickup decides which string to tune decides how much to tune on the basis of preset loaded temperature sends signals to Rohm's BA6845FS motor drivers 16. Working #4 String Tuning Rohm's BA6845FS motor driver controls the tiny servo motors attached to each string Each string is rotated unless it reaches desired frequency 17. Precautions Make sure no two strings touch each other might lead to short circuit Make sure MCK is not pulled when while guitar is in storage, this would drain out the battery completely While strings are removed, make sure that Tailpiece (MCU) doesnt move, this could damage its connectors Dont turn the pegs manually while MCK is pulled, i.e. Robot is ON 18. Conclusions We saw, how a microcontroller helps in automating difficult tasks. A microcontroller makes redundant tasks easier. Gibson Guitar Robot is able to take intelligent decisions by help of a microcontroller. A microcontroller adds more functionalities and values to a product. 19. Thank You For more information - http://www.gibson.com/robotguitar/guitar.html http://www.eetimes.com/showArticle.jhtml?articleID=207400963 C8051F120 Datasheet http://www.datasheetarchive.com/C8051F120-datasheet.html