I know this has been gone over a million times, but I need a hand with this as its my first PIC project. Patience is appreciated.
I understand the usual DTMF receiver is the 8870 with 4 line parallel output. Digikey shows this as obsolete and shows a BU8872 which is non stock but available. Appears to be new technology, pins are reduced to 8 and output is serial one pin with an ACK pin and Steering "ESt" for handshaking.
My goal is to use the output from the headset jack on a cell phone, correctly attenuate the signal for audio input (automatically for any volume or cellphone?). I want a 4 digit code in the PIC with # to confirm / switch a MOSFET or possibly two channels depending on the code input. Provision to change the code by DTMF would be nice too. Writing the program will be the absolute hardest for me.
Is there a way to have a PIC output a beep and simply amplify it, route it back through the headset to have confirmation beeps for code input/change/MOSFET state?
I'm sure everyone can guess the application. I can assure you it is for private educational testing only.
If anyone wants to give me some dedicated education/spoon feed, we can talk about a bump in their PayPal account.
Thanks
I understand the usual DTMF receiver is the 8870 with 4 line parallel output. Digikey shows this as obsolete and shows a BU8872 which is non stock but available. Appears to be new technology, pins are reduced to 8 and output is serial one pin with an ACK pin and Steering "ESt" for handshaking.
My goal is to use the output from the headset jack on a cell phone, correctly attenuate the signal for audio input (automatically for any volume or cellphone?). I want a 4 digit code in the PIC with # to confirm / switch a MOSFET or possibly two channels depending on the code input. Provision to change the code by DTMF would be nice too. Writing the program will be the absolute hardest for me.
Is there a way to have a PIC output a beep and simply amplify it, route it back through the headset to have confirmation beeps for code input/change/MOSFET state?
I'm sure everyone can guess the application. I can assure you it is for private educational testing only.
If anyone wants to give me some dedicated education/spoon feed, we can talk about a bump in their PayPal account.
Thanks