hi, im new here, and i don't know where to post my question, please correct me where to post this...
I'm making a simple project.
i want to trigger the relay when my cellphone rings or vibrate.
what i did was, i remove the vibrator from the cellphone and solder 2 wires from where the vibrator is attached.
i connect the to wires to an non inverting OP AMPS (LM741).
My problem is:
when the cellphone rings (and supposed to vibrate) i get an output voltage of around 8v (or greater than 6v) from the op amp.
i also get the same voltage when the cellphone is not ringing, w/c is supposed to be lower than 6v. (based from different simulators i used).
the voltage output from the vibrator of the cellphone is 0V (not ringing) and 1.5V (ringing).
what is wrong with my circuit?
i will provide the circuit diagram.
**broken link removed**
I'm making a simple project.
i want to trigger the relay when my cellphone rings or vibrate.
what i did was, i remove the vibrator from the cellphone and solder 2 wires from where the vibrator is attached.
i connect the to wires to an non inverting OP AMPS (LM741).
My problem is:
when the cellphone rings (and supposed to vibrate) i get an output voltage of around 8v (or greater than 6v) from the op amp.
i also get the same voltage when the cellphone is not ringing, w/c is supposed to be lower than 6v. (based from different simulators i used).
the voltage output from the vibrator of the cellphone is 0V (not ringing) and 1.5V (ringing).
what is wrong with my circuit?
i will provide the circuit diagram.
**broken link removed**