Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
   
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   


<< Back to INDEX

DTMF Mobile Controlled Robot without Microcontroller [Project]
posted June 16 2014 13:59.22 by spic0m




DTMF is the acronym for Dual tone modulation frequency. Robotic vehicle based on DTMF technology is explained in this article. Here is a circuit that operates the robot without using a microcontroller. This circuit consists of simple ICs.

When a key is pressed from our mobile, it generates a tone combination of two frequencies from our keypad. In the two frequencies, one is high frequency and another one is low frequency. This frequency can be decoded by the decoder IC into binary sequence.
DTMF Based Robotic Vehicle Circuit Principle:

DTMF based robotic vehicle circuit consists of DTMF decoder IC, driver IC l293D IC and motors.

DTMF decoder IC used is HT9107B. It has 18 pins. Tone from DTMF encoder is given to the DTMF decoder IC. The decoder IC internally, consists of operational amplifier whose output is given to pre filters to separate low and high frequencies. Then it is passed to code detector circuit and it decodes the incoming tone into 4bits of binary data. This data at the output is directly given to the driver IC to drive the two motors. These motors rotate according to the decoded output.

Read all the article here.

[Link: Electronicshub]
 
Share



You might also like...


The 10,000 Domino Computer [Crazy Project]

How to wind a toroid inductor, a quick tutorial [Project]

Probably the Best DIY Railgun Thus Far [Project]

Replacing the room lighting with LEDs [Project]

PC Running QBASIC controls 7-Segments via Parallel Port [Project]

125 KHz RFID Operated Deadbolt [Project]

25 Metres Range, Short Wave AM Transmitter

Tie Tying Machine [Project]


<< Back to INDEX



Comments

  Name

  Email (shall not be published)

  Website

Notify me of new posts via email


Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


      

No comment yet...

Be the first to comment on this page!












 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy