That interests me, but where does one buys those chips? (Motorola
MC14499 or MC14489 driver)
I need to drive 32 LEDs 4x8 array, and dont like to much (price) Maxim
7219 and National 5450.

Ivan

Roger L Stevens wrote:
>
> Jon:
> Use the Motorola MC14499 or MC14489 driver.
> Both have SPI /Microwire 3 wire interface. With the
> MC14489 you can drive 28 lamps or bar graph
> elements or five  7-segment LEDS. Mount the driver on your display
> board and you have the equivalent of a LCD module. The drivers
> can be serially chained for larger displays
>
> Roger
>
> Hi,
>
> I would like to use an LED or LCD module in an automotive application.
> The
> module would be mounted in the passenger compartment and subject to
> ambient
> temperatures in Arizona of 150 deg F. I don't believe a LCD can take that
> temperature. I don't want to use 8 I/0 pins to drive LEDs. Any
> suggestions?
>
> I was thinking of the digital instrument panels. Does anyone make an LED
> module that has a similar interface like an LCD? I want to make a digital
> fuel
> gauge, maybe use a bar graph. In addition I would like to display "Fuel
> Level"
> or other measured parameters.
>
> I know you can think of something.
>
> Jon
>
> --------- End forwarded message ----------