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| Micro Controllers Discuss all aspects of micro controllers - building them, coding them, etc. All controllers are welcome - PIC, BASIC, Z8 Encore!, etc. |
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5th October 2009, 01:11 PM
| #1 |
 Lcd connection Hello Guys!!! I am using a 2*16 lcd module. My college sir told me that instead of connecting Vcc to pin no.2(Vcc) of lcd & using a pot between Vcc & gnd connecting its var. pin to pin no. 3(Vee) of lcd, connect directly Vcc to Vee of lcd & leave pin no. 2 of lcd open. He says, by these connections lcd will work fine. Is it correct?
__________________  Lε°ηiδμs | |
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5th October 2009, 01:20 PM
| #2 | |
| Quote:
 Some LCD's work with Vcontrast pin at 0V, but I would recommend a 10K pot from +5V to 0V with the wiper to Vcontrast. This way you can set the optimum contrast for the LCD
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ Last edited by ericgibbs; 5th October 2009 at 01:21 PM. | ||
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5th October 2009, 01:32 PM
| #3 |
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yes it is correct you can leave pin2 and connect Vcc to VEE you can see it in the attached simulation file | |
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5th October 2009, 02:00 PM
| #4 |
| Thank U Very Much Guys!!! Ziedan which simulation software have u used? Is it available for free download?
__________________ Lε°ηiδμs | |
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5th October 2009, 02:13 PM
| #5 | |
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You should not assume that a real LCD will function the same way as a simulated LCD. Vee should be connected as per the datasheet. This LCD help pdf will show the LCDconnections.
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ | ||
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6th October 2009, 01:28 AM
| #6 |
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MOST char LCD need fine tweaking of the Vo (Vee) voltage so they can be seen and look good. Your college sir needs to do some more homework... | |
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6th October 2009, 03:14 AM
| #7 |
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6th October 2009, 05:54 PM
| #8 |
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i'm using proteus and it is free to download and then crack it | |
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10th October 2009, 01:24 PM
| #9 |
| Thank U Everybody!!!
__________________ Lε°ηiδμs | |
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13th October 2009, 09:21 PM
| #10 |
| Hello Again!!! I am using EAGLE for creating the layout. But, there are many overlaps in lcd connections when I connected lcd in standard fashion i.e. P0(0-7) to D(0-7) of lcd & P2(5,6,7) to RS,R/W,EN resp.. Instead if I connect P2(7-0) to D(0-7) & other 3 to P0 pins will it work fine?  While writing program I will take care that P2.7 to P2.0 are D0 to D7 respectively. Latter one simplifies the problem. Please help. 
__________________ Lε°ηiδμs | |
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14th October 2009, 12:32 AM
| #11 | |
| Quote:
You are must be very SMART
__________________ I'm could be wrong many time's, at least I know what I'm doing. http://shop.ebay.ca/merchant/csaba911 | ||
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| Tags |
| connection, lcd |
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