On Fri, 31 Jan 2003, Pendley, Michael wrote:

*>A one wire interface to an LCD display would certainly be useful in some
*>applications but your design begs the question -- why make the circuit so
*>complicated?  5 ICs (flip flops, monostables, gates) are required.  Why not
*>just attach a pic chip to the display and implement a one wire interface in
*>software?

Someone already did this on this list. There are 2 ways: using a serial to
parallel shift register or a pic. I did it with a 4094 and two transistors
in 1997. The interface is slow. PIC based lcd 'backs' are available
commercially and there is code on the web for them too.

Peter

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