- Category:
- Communication
- Tags:
-
- File Size:
- 17kb
- Update:
- 2017-07-06
- Downloads:
- 0 Times
- Uploaded by:
- 张宗军
Description: with 89c2051 simulation of DTMF signals, widely used in anti-theft alarm, telephone data transmission; Savings and resumption of the circuit, and low cost.
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