RST Engineering - JIm wrote:
By God, you are correct. When my supplier told me in 1999 that the LM3914
was no longer available, they failed to tell me that the LM3914-1 was a
direct replacement and very much still in the pipeline, even as the larger
18 pin through-hole DIP package. Thanks for correcting me.

Jim


"Rip" wrote in message
...
RST Engineering - JIm wrote:
Yes. It was made by National Semiconductor and you could get it linear
or logarithmic. It was obsoleted by National about fifteen years ago,
but there are still a few of them in the pipeline at a pretty hefty
price.

Jim



wrote in message
...

Isn't there a voltage-to-LED-bar-graph IC? I seem to
remember such a thing. That would make the circuit simple.

Nope. It's still very much available in the surface mount package.


My pleasure. This topic is timely, since I recently built myself a
"Lift Reserve Indicator" based on the LM3914 and a Honeywell sensor.
Now I'm doing a "true" angle of attack indicator based on the Maxim
4210 multiplier (and an op amp) to correct for airspeed ram pressure.

A terrific treatise on the subject (with one inconsequential math error)
can be found he
http://users.cablemo.net/~jjshultz/sonex/aoa.html

Rip