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Title: ???blink test works in proteus & dev board, but not in projectboard Post by: cigua on October 29, 2007, 02:05:53 02:05 hi to all, whats going on with this is that simple code blink.bas works fine in proteus, also in my matrix m development board, but i remove the chip do a basic setup of it in a protoboard and it doesnt work, using 4mhz crystal, 22pf caps, also tested w/out caps, 5v and gnd to chip, led with resistor in ouput pin, why isnt working
am using 16f84-04/p, is it mandatory to ground or 5v the unused pins? thanks for any help Title: Re: ???blink test works in proteus & dev board, but not in projectboard Post by: jeanninemtv on October 29, 2007, 04:41:40 04:41 attach pullup resistor to mclr pin. maybe you forgot it
check the values of caps attached to crystals. if you are working on protoboard they are not mandatory. one time i used 100n ;D and pic dont work.... ::) little error .... but check out your circuit. or check fuses while programming Title: Re: ???blink test works in proteus & dev board, but not in projectboard Post by: cigua on October 29, 2007, 05:02:58 05:02 hi jeanninemtv, mclr has pullup, fuses are xt crystal 4mhz, wdt off, pwrup on, tried with caps and w/out, what else could it be?
Title: Re: ???blink test works in proteus & dev board, but not in projectboard Post by: mculove on October 29, 2007, 06:48:30 06:48 Did you try to disable Watchdog timer while programming your chip?
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