9947Re: [cosmacelf] Re: Seven Segment Displays
- Apr 3, 2012
On 4/3/2012 6:31 PM, eight_bit_jdrose wrote:
Lee Hart wrote:
>>> I have used the 2X16 character displays like
> Mr. Hart, That is a nice, contrasty display at a decent price.
> Do you know if there is a version of this display that is serial instead?
I'm not the original poster. I haven't used this particular one, but I
have used a number of similar ones. There are *hundreds* of them on the
market! Almost all of them have 4-bit or 8-bit parallel interfaces. The
protocol varies from display to display, so you *need* to have
documentation on it, or you'll spend/waste a lot of time
To get a serial I2C interface, they add a microcomputer. To get an
asynchronous serial interface (RS-232 etc.), it also needs a stable
accurate clock forthe baud rate. These add cost. Typically, they make a
little board with the micro and associated parts for the serial
interface, and then plug in some generic LCD module with a parallel
interface onto it. These generally sell for $20 and up (i.e. about twice
the cost of the parallel LCD modules alone).
An engineer can do for a nickel what any damn fool can do for a dollar.
-- Henry Ford
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart at earthlink.net
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