Can a microcontroller pic16f877a control a number of lcd? Normally its just one but in my case since i am doing food ordering system , i nid the microcontroller to display data in various stall , is it possible?
I like tshuck's idea. It makes the whole system faster and more expandable.Yes, it can be done.
Just share the data line and strobe the EN pin.
...how should the user interact with them?You can buy text LCDs now on ebay, with a tiny "backpack" attached that accepts I2C or serial data.
That way the remote LCDs only need one or two signal wires to send text data to them.
I2C might be too short distance wise.You can buy text LCDs now on ebay, with a tiny "backpack" attached that accepts I2C or serial data.
That way the remote LCDs only need one or two signal wires to send text data to them.
It wasn't asked and wasn't considered....how should the user interact with them?
Either the main controller will need to offer up more I/O for each stall (two for LCD serial, assuming RS-232, or I2C, and however many are required for the user to interface with), or a few wires (I2C, RS-485/422), CAN/LIN, ethernet, etc.) and multiple controllers (one per stall). ...
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I figured a "food ordering system" meant the user ordered food with it, but you're right, it wasn't asked for.It wasn't asked and wasn't considered.
by Jake Hertz
by Jake Hertz