PIC micro-controller programming

草下飞

i hav a project in my university, it is about the automatic door lock using a handphone as a remote controller, and then users will call to home's telepone. then after several times of ringing without anyone to answer, the micro-controller will activate the off-hook mode( acts like the receiver being lifted). then the system will wait for the users to key in the password. if the password id correct, the magnetic door will be opened. it involves the DTMF decoder to decode the password signal into digital form before it is directed to the micro-controller. a ring detector is also need to detect if there is call coming.

so, is there anyone who has the shematic diagrams for the whole system?
and also the PIC programming of the system?
thanks very much...

pic

既然是大学的Project，就应该自己设计，而不是向人要完整的电路图和program.

设计时，如果有问题，再回来问，大家都很乐意帮助你。

以下的电路，可以帮你起个头。IC1 KT3170，（DTMF decoder）， 也可以用MT8870。用你的PIC起代IC2 74154。

（你好像忘记要用中文，小心这是会扣分的。）

kevin_obl

PIC 16F877A, Simple and powerful. 忘记要用中文，这是会扣分的