Is there any way an LCD display would work without using PIC. Just a logic gates approach. Can anyone give me a suggestion to this problem. I'm working to build a fuel dispenser prototype.So i guess it would be better to used an LCD rather than a 7-segment.
i think it is mearly possible to do it with gates... and nobody on this forum would even attembt to do so... this would be really crazy!
i guess you'r new to micro controllers and hope to get away with a slightly more complicated gates array.. but not, you'll have to step into micro controllers.. and as gramo said, it is really easy, whether you'r using PIC or ATMEL..
Is there any way an LCD display would work without using PIC. Just a logic gates approach. Can anyone give me a suggestion to this problem. I'm working to build a fuel dispenser prototype.So i guess it would be better to used an LCD rather than a 7-segment.
Contrary to popular belief it is actually quite easy to drive a direct drive LCD with logic. You do not mention how complicated the LCD is.
Any static drive LCD can be driven by taking the data from the 7 segment decoders through EXOR gates with the second input to and oscillator that also drives the LCD common pin.
I suppose most of us (myself included) immediately thought of LCD's with onboard controllers (like the HD44780) which we're used to using, rather than the much cheaper direct-drive LCD panels, which are in fact much better suited to logic control, as cadstarsucks pointed out...
I am well aware of the BP issue having designed LCDs for production...the best solution would really be a PLD...2 pins for an RC osc, a shift clock input, a data input and as many outputs as you need.