Q: Which microcontroller is used in this project?
A: A 40 pin microcontroller from 8051 family is used in this project.
Q: Can this project be implemented using the landline phone?
A: No, this project has been designed to be implemented with only a mobile phone.
Q: What is DTMF?
A: DTMF or Dual tone multi frequency is a signaling system which uses a combination of two frequency tones to represent a key pressed on the keyboard of any cell phone.
Q: What are keypad tones?
A: Keypad tones are the audible sound heard, when a key is pressed on the mobile phone.
Q: How to set the keypad tones?
A: Go to sound setting->tones->keypad tones->volume maximum
Q: Which DTMF IC is used?
A: IC 8870 is the DTMF IC used
Q: How can one control the robot?
A: One can control the robot remotely or directly connecting the cell phone using a 3mm audio jack.
Q: Can this project be implemented using any kind of mobile phone?
A: Yes, this project can be implemented using any kind of mobile phone, supporting a 3mm headphone jack.
Q: Why my phone is not working for the project while it works with other phones?
A: The dialing tones generated by a phone forms as an input to the project for proper working. While some phones develop exact DTMF tones even before establishing a call while pressing the numbers, some other phones develop a flat tone for any number pressed. Besides the same, some phones the internal speakeroutput is not disabled owing to some specific setting enacted by the user. In these cases directly dialing through chord connection shall not work. However if a call is initiated to the dialed number mobile which is interfaced to the project it will work (provided the connector is not loose) as DTMF tones are compulsorily made available to the receiver from the exchange ,as all our IVRS works on those kind of tones. Therefore,if the project does not work by direct wire connection please try by dialing the number from any other phone. In order to be doubly confirmed make sure that while one inserts the pin to the cell phone the speaker gets disconnected failing which it is not going to work because the tones are sent to the project board only if the speaker of the cell phone is disabled.
Q: What is the motor speed?
A: Motor speed is about 45RPM.
Q: What is the remote access?
A: Controlling the robot by establishing a call with the connected mobile phone is remote access.