digital voltage output

[CoyoteBoy]

Hi all,

Anyone know of a simple circuit that I can throw together that will
display an output on a dual 7 segment LED numeric display, its simply
converting 0-5v range input to 0-15 on the 7-segment display
hopefully. Simple and fast as possible, and small Been searching
round but I can only find single 7 segment or LCD ones, which are not
useful.

Cheers
James

 

[loedown]

Hi All,
I don't have a circuit handy, but either an AD converter or
ladder network with decoder will suffice.

The LM3914 is a 10 LED driver on a chip, if you have 2 of them with a simple
resistor divider for the second one, to give an offset for the last 5.

this is really just on 2 minutes of thought, good luck

Paul

 

[Steve]

I use a picaxe controller for this sort of stuff. It is a single chip
thing programmed in basic from your PC over the serial port. There is a
nice application to program the basic in and try it out. The 18X chip
has a 10bit A/D converter built in and 8 output lines which can drive an
LED (1 bit for digit select and 7 for the segments). You could either
strobe them or put latches in.

The big advantage of the programmable part is that you can do some
processing on the digital value to result in a meaningful output value.

Maybe it is overkill for your application but they are very cheap and
can usually remove a lot of other circuitry

Have a look at www.picaxe.com.

Steve

 

[Coyoteboy]

Cheers for the two suggestions guys, I'll have a good look into both, though
I must admit I've always loved the idea of programming my own chips to my
needs.

J

"Steve" <no.spam@for.me> wrote in message
newsK41d.3250$mZ2.303315@news02.tsnz.net...

I use a picaxe controller for this sort of stuff. It is a single chip
thing programmed in basic from your PC over the serial port. There is a
nice application to program the basic in and try it out. The 18X chip
has a 10bit A/D converter built in and 8 output lines which can drive an
LED (1 bit for digit select and 7 for the segments). You could either
strobe them or put latches in.

The big advantage of the programmable part is that you can do some
processing on the digital value to result in a meaningful output value.

Maybe it is overkill for your application but they are very cheap and
can usually remove a lot of other circuitry

Have a look at www.picaxe.com.

Steve