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« Reply #20 on: February 10, 2008, 10:08:04 AM » |
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Bakit kakaunti ang transistors? Ilang amps ba consumption na ng system mo? 1A or 1.5 A ba ang 7805? Check mo ang routine ng scanning mo.
1 transistor per row po. 8x8 ang matrix, so 8 rows. ung 1ng (last row,sa pinakababa po) nakapatay na... kaya 7 lang ang transistors. nung sinukat po namin current from adaptr to regulator, aprox 500mA. pero 1 adptr na 500mA kaya ang 2 lines. 100mA ang Io ng 78L05.... |
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« Reply #20 on: February 10, 2008, 10:08:04 AM » |
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toasted siopao
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« Reply #21 on: February 10, 2008, 10:13:47 AM » |
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nung sinukat po namin current from adaptr to regulator, aprox 500mA. pero 1 adptr na 500mA kaya ang 2 lines. 100mA ang Io ng 78L05.... Di ko gets ito.. |
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« Reply #22 on: February 10, 2008, 10:16:33 AM » |
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Yup. definitely this is an issue on programming structure . e.g refresh rate/clock cycle or loops scan inconsistency that the matrix display can not respond appropriately... uulitin ko, change the programming structure.. huwag mo ng palitan.. okay na yan... ang problem jan is the scan loop organization mo sa program mo.. sa tingin ko, nakapattern ka sa zilog matrix scan documentation noh? advise ko sayo huwag mong gayahin yun... search the web for other programming structures.. trust me... it will work...  -creedcradle hindi naman po dun nakapatern. wer not familiar with zilog po. kung my similarities, d po namin sinasadya. hehe.. sige po, try po namin paikliin ing program and baguhin mga delays... tnx sir |
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« Reply #23 on: February 10, 2008, 12:42:35 PM » |
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Di ko gets ito..
what you min ba sir e ung input current ng 78L05? its approx 500mA. supply namin ay galing sa adptr na 500mA. 1 adptr, kaya nya ang 2 lines na 12 cascaded matrices each line. so kung 2 ung line na nagsshare sa 500mA, baka mga 250mA, kaya na idrive yung system |
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toasted siopao
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« Reply #24 on: February 10, 2008, 12:46:39 PM » |
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Ano ba ng maximum current deliverable ng 7805?
Ano ba ang current consumption ng system mo?
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« Reply #25 on: February 10, 2008, 12:47:48 PM » |
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according naman po sa datasheet ng 78L05, output current po nya is 100mA... eto po ba ang tinatanong nyo sir?
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paranz
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« Reply #26 on: February 10, 2008, 12:50:27 PM » |
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according naman po sa datasheet ng 78L05, output current po nya is 100mA... eto po ba ang tinatanong nyo sir?
medyo mababa nga current output ng 78L05 (to-92 package?) nyo. Siguro yan reason bakit uneven ang brightness. why not use the common TO-220 version? |
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« Reply #27 on: February 10, 2008, 12:55:44 PM » |
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Bakit yung 78L05 gamit nyo? Di yung 7805 lang talaga, 100A, naku kulang yan para sa system mo, ang init na siguro ng regulator mo yan at chances are, magdrop na yan below 5V.
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« Reply #28 on: February 10, 2008, 01:02:02 PM » |
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ay, cguro nga po... cguro din sa program, we will try to improve the project nlng. hehe... lalagay ko nlng po siguro sa recommendations ng thesis namin. hehehe... la na po time baguhin pa. anyway, thanks po sa trouble shooting. very much appreciated.
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« Reply #29 on: February 10, 2008, 01:05:42 PM » |
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Bakit yung 78L05 gamit nyo? Di yung 7805 lang talaga, 100A, naku kulang yan para sa system mo, ang init na siguro ng regulator mo yan at chances are, magdrop na yan below 5V.
mainit nga po. eheheh.... kahit may heat sink po... heheh... engot nu. |
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« Reply #30 on: February 10, 2008, 08:01:08 PM » |
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oops, we used 7805 pla, not 78L05. sory. nasa prog lang po pala ung mali. thanks po sa mga tumulong!!!!  maraming salamat po tlaga! |
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mArKhAo
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« Reply #31 on: June 30, 2008, 07:01:52 AM » |
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wow.. galing naman ni pare... hehe |
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grimlock99
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« Reply #32 on: July 01, 2008, 08:31:46 PM » |
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oops, we used 7805 pla, not 78L05. sory. nasa prog lang po pala ung mali. thanks po sa mga tumulong!!!! maraming salamat po tlaga! gumana na? |
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Mentor Lee
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« Reply #33 on: July 01, 2008, 10:25:57 PM » |
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paki upload ng full source code & clearer schematic.  |
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...and show you great and inscrutable things that you do not know "
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paranz
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« Reply #34 on: July 01, 2008, 10:29:38 PM » |
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hehe this is an old thread |
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« Reply #35 on: July 09, 2008, 09:03:03 PM » |
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paki upload ng full source code & clearer schematic. sir, sobrang haba ng source code nito sa assembly, 32 pages... hehehe... |
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« Reply #36 on: July 09, 2008, 09:04:45 PM » |
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I'll try to look for the soft copy.. graduate na po kasi ako. hanapin ko pa po yung docs ko ulit
pasensya na. hehehe
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paranz
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« Reply #37 on: July 09, 2008, 09:54:54 PM » |
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sir, sobrang haba ng source code nito sa assembly, 32 pages... hehehe...
parang nag-doctoral ka na sa assembly |
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« Reply #38 on: July 13, 2008, 02:38:41 PM » |
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parang nag-doctoral ka na sa assembly kc convert lang ginawa namin. actually 4-5 pages lang xa sa picbasic. hehe... bawal kasi sa skul namin ang picbasic kaya kinonvert to assembly nalang... wahaha.. nagpahaba po dun yung config bawat char, |
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rdpzycho
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« Reply #39 on: July 13, 2008, 08:15:39 PM » |
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wala bang ASM output ang PICbasic?
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July 28, 2008, 07:01:56 PM
