Pic12F683 LCD question

[Mike - K8LH]

looks like a nice setup Mike i'm also about to design a circuit for the 683 but i'm using gEDA and mail the gerber files to iteadstudio .. it takes a few weeks to get the boards but it is sure worth waiting for the cheapest boards are 2X2 inches ( 9.90 +4 dollar PP) .. i usually get 12 pcb's.

That's great. I hope it turns out nice...

I also notice that you have a ICSP header . how do you isolate it from rest of the circuit ?

I isolate the ICSP pins by disconnecting anything that is plugged into the RA0 (PGD), RA1 (PGC), and RA3/MCLR (VPP) connectors before programming. I got half of the wiring done on the new board today and I successfully programmed a 12F635 and a 16F1623 using ICSP (yippee!)...

another question i have .. Is it possble to have more than one button connected to a single input on the 683 ? i was thing about adding 4 buttons and maybe usinge a voltage divider for each of em and do the rest in software.. can it be done that way ?

Yes, you should be able to do that. In fact, Raj Bhatt just put up an article on his Embedded-Lab blog yesterday about doing exactly that, and I believe he's using a 12F683 too.

Another method involves mux'ing the LCD D4-D7 and RS driver lines to drive a switch matrix (between LCD operations). This method requires one additional µC pin to read five push button switches (or two pins to read ten push buttons, etc.).

 

[lurkepus]

i't looks like everything LCD dies .. i had 2 lcd monitors both died and they both had blown caps in the psu .. first time i have seen that happen .. even my old CRT monitor is working . anyway i have bought a 21,5" BenQ LED monitor. anyway i'm back on track with the pcb design and hopfully i will be done this week

 

[Mike - K8LH]

Hi Stig,

Sorry to hear about your LCD problems. Hopefully you'll be in good shape soon.

Progress on my new proto' board has been slow. I finished wiring it up a couple days ago but I only just got it up and running today. In the picture below, the larger device on the left is a 14 pin 16F1823 and the 8 pin device on the right is the K8LH 12F635 Serial LCD interface.

Happy Holidays!

Regards, Mike

 

[lurkepus]

i got a new monitor and see the 2 broken once as an oportunity to get my limited skills to use I have been working on a pcb design and i just need to add a ICSP header only problem is that i need to do some more reading on the subject .. my idea is to separate the ICSP part from rest of the circuit using 3 pin headers and jumpers .. got limited spcace but i'm sure it will fit on my pcb

How are your project going Mike ??