Author Topic: seven segment display (Read 2398 times)

monday · « **on:** March 20, 2009, 08:55:10 PM »

good day po ulit,..

patulong naman po regarding sa pagpapailaw ng seven segment display..
hindi ku po kase alam kung pano iddisplay ang 8 bit na binary signal into decimal sa 3 digit seven segment display,..
or sa kahit tatlong hiwahiwalay na 7 segment..
yun pong mismong macconvert na xa into decimal sa display.. yung wala nang need na magcount pa xa to reach the number..
help naman po..

Philippine Electronics Forum · « **on:** March 20, 2009, 08:55:10 PM »

Kaizer03 · « **Reply #1 on:** March 20, 2009, 09:03:52 PM »

try to find the datasheet of 74LS47 (BCD(Binary-Coded-Decimal) Decoder)

^_^

Philippine Electronics Forum · « **Reply #1 on:** March 20, 2009, 09:03:52 PM »

Dufox™ · « **Reply #2 on:** March 20, 2009, 09:59:05 PM »

hanap ka ng multiplexer IC

Philippine Electronics Forum · « **Reply #2 on:** March 20, 2009, 09:59:05 PM »

monday · « **Reply #3 on:** March 21, 2009, 07:22:23 AM »

Quote from: -[kaizer]^[gigz09]- on March 20, 2009, 09:03:52 PM

try to find the datasheet of 74LS47 (BCD(Binary-Coded-Decimal) Decoder)

^_^

hmm,. hindi pu ba hanggang 4 bit lang ang kaya nya idecode?
panu po connection nya kung 8 bit yung iddecode namin?

Quote from: Dufox_®©™ on March 20, 2009, 09:59:05 PM

hanap ka ng multiplexer IC

para san po to?

Philippine Electronics Forum · « **Reply #3 on:** March 21, 2009, 07:22:23 AM »

HK-47 · « **Reply #4 on:** March 21, 2009, 09:40:46 AM »

IIRC you can cascade 74LS47 BCD-to-7-segment decoders. Check the datasheets to be sure

Philippine Electronics Forum · « **Reply #4 on:** March 21, 2009, 09:40:46 AM »

Kaizer03 · « **Reply #5 on:** March 21, 2009, 02:47:20 PM »

Quote from: monday on March 21, 2009, 07:22:23 AM

hmm,. hindi pu ba hanggang 4 bit lang ang kaya nya idecode?
panu po connection nya kung 8 bit yung iddecode namin?

para san po to?

yep 4bit lang pero pede mo sya i-cascade.. maraming configuration para mameet mo yung requirements mo =)

you were going to display a 999 value on three seven segment..

ahmm may i ask you if this project is MCU controlled or only pure digital ICs?

or you may use 4511, (Latching Decoder) ^_^ pakiexplain na lang po ng mabuti yung project nyo para po makapagbigay kame ng definite solution ^_^

thanks =)

monday · « **Reply #6 on:** March 21, 2009, 07:03:56 PM »

Quote from: -[kaizer]^[gigz09]- on March 21, 2009, 02:47:20 PM

yep 4bit lang pero pede mo sya i-cascade.. maraming configuration para mameet mo yung requirements mo =)

you were going to display a 999 value on three seven segment..

ahmm may i ask you if this project is MCU controlled or only pure digital ICs?

or you may use 4511, (Latching Decoder) ^_^ pakiexplain na lang po ng mabuti yung project nyo para po makapagbigay kame ng definite solution ^_^

thanks =)

ahh,..
hindi po xa MCU controlled..
hmmm, pure d latches and logic gates lang po..
hmm, we were asked to design a circuit that will add and subtract 8 bit data..
bale, kumpleto na po yung circuit namin that adds and subtract,..
kulang na lang po e yung display..requirement po kase na pag naginput ka ng data, nakadisplay xa sa seven segment..
ganun din po ang output..

Mayalin22 · « **Reply #7 on:** March 21, 2009, 07:14:53 PM »

Meron ako ginawa sa Proton Basic 7segment multiplexing using interrupt. Target Pic 16F628. Bale Temp monitor using DS1820.

monday · « **Reply #8 on:** March 22, 2009, 02:41:49 PM »

san po ang connection pag nagccascade ng 7447?
pati po yung connection sa 7 segment,.

thnx po..

Philippine Electronics Forum · « **Reply #8 on:** March 22, 2009, 02:41:49 PM »

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