* source code for mikroC PRO compiler V1.65
 * feel free to use this code at your own risks
 *
 * target : PIC12, oscillator in HS mode, watchdog enabled
 *
 * PIC PIN Assignemnt :
 *
 * GP0 : detect LED indicator
 * GP1 : calibrate LED indicator
 * GP2 : NC
 * GP3 : NC
 * GP4, GP5 : inductor
 *
 *******************************************************************************
 */
#define MAXTRY 15       // number of watchdog restart to calibrate loop counter
unsigned char   ctr ;           // number of loops between two watchdog resetsunsigned char   previous ;      // previous value of ctrunsigned char   calibr ;        // calibration value when oscillator runs freeunsigned char   restarts ;      // number of watchdog restartsunsigned char   en ;            // enable flag, allows detection

/*
 * main loop
 */void    main()        {        unsigned char   i ;        

        /*
         * configure GPIO as digital port
         */        CMCON0 = 7 ;        ANSEL = 0 ;        TRISIO = 0 ;        GPIO = 0 ;
        /*
         * power up ?
         */        if(STATUS.NOT_TO)                {                /*
                 * yes, init variables
                 */                restarts = 0 ;                calibr = 1 ;                }
        /*
         * watchdog reset counter
         */        if(restarts < 255) restarts++ ;
        /*
         * if counter differs too much from calibration value
         */        if((previous ^ ctr) > calibr)                {                /*
                 * turn detect LED on
                 */                GPIO.F0 = en ;                
                /*
                 * if not on power up
                 */                if(STATUS.NOT_TO == 0)                        {                        /*
                         * while in calibration mode
                         */                        if(restarts < MAXTRY)                                {                                /*
                                 * shift calibration value
                                 * and wait a little bit
                                 */                                calibr <<= 1 ;                                Delay_ms(5) ;                                }                        }                else                        {                        /*
                         * turn detect LED off
                         */                        GPIO.F0 = 0 ;                        }                }
        /*
         * save last counter
         */        previous = ctr ;
        /*
         * is calibration over ?
         */        if(restarts > MAXTRY)                {                /*
                 * yes, turn calibrate LED off
                 * and set enable flag
                 */                GPIO.F1 = 0 ;                en = 1 ;                }        else                {                /*
                 * no, turn calibrate LED on
                 * and clear enable flag
                 */                GPIO.F1 = 1 ;                en = 0 ;                }
        /*
         * set watchdog prescaler
         */        OPTION_REG = 0b11111001 ;        
        /*
         * start counter, to be interrupted by watchdog
         */        ctr = 0 ;        for(;;)               {               ctr++ ;               }        }

NEW:: picoDetector : How to detect metal with a PIC

You are certainly familiar with Youtube or other streaming video sites that is fun and interesting to visit. Such as Speedbit Video Accelerator, Bywifi Video Accelerator is a free software to speed-up and accelerate the bit-rate streaming video up to 3-5 times faster . In addition there are some other helpful functions such as download that can be used to download videos from some streaming video sites that are supported by Bywifi Video Accelerator.

Streaming video sites supported by Bywifi Video Accelerator are:
YouTube, Facebook, Dailymotion, Veoh, Metacafe, 56.com, Youku, Tudou, CrunchyRoll, MegaVideo, 5min, 6.cn, 9you, Angry Alien, AnimeEpisodes.Net, Badjojo, Bebo, Blastro, Blennus, Blip.tv, Bofunk, BollywoodHungama, Break, Broadcaster, Buzznet, Chilevision.cl, ClipFish.de, ClipLife.jp, ClipJunkie, ClipShack, CollegeHumor, Current, Current TV, Dachix, Danerd, DailySixer.com, dalealplay, DevilDucky, Disclose.tv, DoubleAgent, eBaumsWorld, elpolvorin, eSnips, ExpertVillage, EVTV1, FindVideos, Flurl, FunnyJunk, FunnyorDie, Glumbert, GodTube, GoFish, Google Video, Graspr, iFilm, Hallpass, HowCast, HowStuffWorks, iShare.Rediff, Jokeroo, Jumpcut, Justin.tv, Kewego, Kontraband, ku6, Izlesene, LiveVideo, LiveLeak, lulu.tv, Mediabum, Midis.biz, MilkandCookies, Mojoflix, MonkeySee, Music.com, MusicMaza, MusicVideoCodes.info, Myspace, MyVideo.de, Newgrounds, NothingToxic, Pikniktube, Pixparty, Photobucket, PlsThx, PokerTube, vbox7, Viddyou, Videa.hu, VideoWebTown, VideoCodesWorld, VideoCodeZone, videolectures, Vidiac, Vidivodo, vidiLife, VidPK, Vimeo, VReel.net, vSocial, Yahoo Videos, WeGame, Wuapi, Yikers, Yobler, YourFileHost, YouSportz, YummyBun, ZippyVideos, Zoopy, zShare.net, Putfile, PWNorDIE, RetroJunk, Revver, RuTube.ru, SantaBanta, Sevenload, Sharkle, Shoutfile, Sina Videos, SmitHappens, Snotr, Spike, StreetFire.net, StupidVideos, SuperDeluxe, SuperNovaTube, TeacherTube, That Video Site, TheOnion, TinyPic, TotallyCrap, tu.tv, and life-7.com

Download Bywifi Video Accelerator

Bywifi Video Accelerator , Watch your streaming video up to 3-5 times faster

Description:
A single chip metal detecor with a range of a few inches. This is useful for decting nails or screws in walls and floors, or for locating buried mains cable.

Notes:
The heart of the circuit is a single IC the CS209A made by Cherry Semiconductor. The detector, is a single 100 uH choke. The IC has an integral oscillatorm the choke forms part of an external LC circuit, its inductance being altered by the proximity of metal objects. It is the change in oscillation that is amplified and demodulated. Led 1 will light and the buzzer will sound when the choke change sinductance. Set up is easy, VR1 is adjusted with the cjoke away from any metal source so that the LED lights and buzzer sounds. The control is backed off so that the LED goes out and buzzer stops. Now when the choke comes into contact with any metal object that alters its inductance, LED 1 and the buzzer will activate.

Since I first wrote this article Maplin no longer sell the CS209A. However the same part CS209AYN8 may be bought from ON semiconductors. Note that the package 626-05 is the 8 pin DIN type that is required.

Metal Detector