7 Segment Led Clock using PC signal - Electronic Circuits Projects Diagrams Free

vito3693 · 16th April 2007, 02:48 PM

Hi, I'm trying to build a clock using 4 7 segment LEDs. The requirement is that the clock must display the time using signals from a computer. Currently I have a four 7 segment displays, a 555 timer, 74LS47 Binary to decimal decoder, RS Flip Flops, and a 74LS245 Buffer/Transceiver, a few resistors and capacitors. A description would be appreciated, but if possible could anyone post up a circuit diagram. Any help would be greatly appreciated. THX.

penoy_balut · 16th April 2007, 04:42 PM

all you need are few resistors and four 7 segment displays then interface your circuit on PC parallel port, create a software to read time on your PC and send data to parallel port, VB is the easiest to use.

vito3693 · 18th April 2007, 03:20 AM

Well I know the basics of it and how to put it together, so thats not the problem. Its just that I'm not sure which order everything is to be placed in. Although I think it should be PC->Buffer->FlipFlops->Decoder->Display. If anyone could put up a schematic diagram it would be great. thx

TheVictim · 18th April 2007, 04:22 AM

You guys should rename this site "We Do Your Homework For You!", then charge $50 a pop to engineer schematics for people.

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16th April 2007, 02:48 PM	(permalink)
vito3693	7 Segment Led Clock using PC signal Hi, I'm trying to build a clock using 4 7 segment LEDs. The requirement is that the clock must display the time using signals from a computer. Currently I have a four 7 segment displays, a 555 timer, 74LS47 Binary to decimal decoder, RS Flip Flops, and a 74LS245 Buffer/Transceiver, a few resistors and capacitors. A description would be appreciated, but if possible could anyone post up a circuit diagram. Any help would be greatly appreciated. THX.

16th April 2007, 04:42 PM	(permalink)
penoy_balut	all you need are few resistors and four 7 segment displays then interface your circuit on PC parallel port, create a software to read time on your PC and send data to parallel port, VB is the easiest to use.

18th April 2007, 03:20 AM	(permalink)
vito3693	Well I know the basics of it and how to put it together, so thats not the problem. Its just that I'm not sure which order everything is to be placed in. Although I think it should be PC->Buffer->FlipFlops->Decoder->Display. If anyone could put up a schematic diagram it would be great. thx Last edited by vito3693; 18th April 2007 at 03:23 AM.

18th April 2007, 04:22 AM	(permalink)
TheVictim	You guys should rename this site "We Do Your Homework For You!", then charge $50 a pop to engineer schematics for people.