(→Download project) |
|||
Line 73: | Line 73: | ||
[[Category:Projects]] | [[Category:Projects]] | ||
[[Category:PIC12]] | [[Category:PIC12]] | ||
+ | |||
+ | ==Discussion and comments | ||
+ | <discusion /> |
An ultrasonic bat detector with only 3 components !
Contents |
Let me introduce PicoBat to you with this short video clip :
The idea of this circuit is to hack the PIC oscillator circuit, by replacing the crystal by a piezo sensor : the frequency of the oscillator depends on ultrasonic waves presence.
Oscillator frequency is then divided by 4 by the PIC, and pushed into a piezo speaker.
It shares the same idea as PicoDetector, the metal detector.
/* ******************************************************************************* * picoBAT : an ultra simple ultrasonic bat detector ******************************************************************************* * * Author : Bruno Gavand, February 2009 * see more details on http://www.micro-examples.com/ * * source code for mikro C compiler V8.2 * feel free to use this code at your own risks * * target : PIC12 * * PIC PIN Assignemnt : * * GP0 GP1 : piezo speaker * GP5 : ultrasonic transducer receiver * ******************************************************************************* */ void main() { /* * configure GPIO as digital port */ CMCON0 = 7 ; ANSEL = 0 ; TRISIO = 0 ; GPIO = 0b01 ; for(;;) { /* * toggles speaker outputs */ GPIO ^= 0b11 ; } }
No, there is no mistake, full source code is above !
Download PicoBat-project.zip file for mikroC : File:PicoBat-project.zip
Includes :
==Discussion and comments <discusion />