Electronics experts, looking for a schematic...

ChemMan · 06-12-2003, 02:49 PM

I wonder if someone could supply me with a schematic of a circuit that takes an positive voltage input, say from 0 to 12 volts DC and uses one of those LED number displays(the kind with the 8 LED segments) to go from 0 to 9 depending on the voltage. I am thinking of hooking something like this up to a voltage regulator in my fan controller to indicate the speed of the fan.

Unfortunately a set-up like I just described is beyond my knowledge so I need some help.

Any input is appreciated.

ChemMan · 06-12-2003, 06:26 PM

Okay I found something a little helpful HERE. About halfway down the page there is a schematic that uses a 555 timer to make the LED display count from 0 to 9 or 9 to 0. Now I just need to figure out how to replace the timer part with something that would react to a voltage change.

I'll keep looking. Maybe someone can offer a suggestion.

Thanks

06-12-2003, 02:49 PM	#1
ChemMan Cooling Neophyte Join Date: Jan 2003 Location: New Jersey, USA Posts: 15	Electronics experts, looking for a schematic... I wonder if someone could supply me with a schematic of a circuit that takes an positive voltage input, say from 0 to 12 volts DC and uses one of those LED number displays(the kind with the 8 LED segments) to go from 0 to 9 depending on the voltage. I am thinking of hooking something like this up to a voltage regulator in my fan controller to indicate the speed of the fan. Unfortunately a set-up like I just described is beyond my knowledge so I need some help. Any input is appreciated. __________________ AthlonXP 1600+ Soyo KT400 dragon ultra 512 megs Samsung DDR333 PowerColor 9700 Antec SOHO case other junk

06-12-2003, 06:26 PM	#2
ChemMan Cooling Neophyte Join Date: Jan 2003 Location: New Jersey, USA Posts: 15	Okay I found something a little helpful HERE. About halfway down the page there is a schematic that uses a 555 timer to make the LED display count from 0 to 9 or 9 to 0. Now I just need to figure out how to replace the timer part with something that would react to a voltage change. I'll keep looking. Maybe someone can offer a suggestion. Thanks __________________ AthlonXP 1600+ Soyo KT400 dragon ultra 512 megs Samsung DDR333 PowerColor 9700 Antec SOHO case other junk

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