Discussion in "Project Doubts" started by    Chinmay Das    Mar 10, 2009.
Mon Oct 12 2009, 04:37 PM
that is great chinmay

chinmay in ur post "7805 heating up" everyone have mentioned that a resistor is used for reducing the current we have already used a pot resistor as shown in ckt diagram

so we ahve to use some other resistor or everyone is talking about that resistor
???????

Mon Oct 12 2009, 05:15 PM
thanks mohsin
Mon Oct 12 2009, 10:26 PM
Green Bee Rocks .........more dan 11000 viewers n 240 replies...n still on...
guies very soon i will upload Green Bee AVR version , currently working on it. so pls visit the site regularly...and yes HAPPY DIWALI...in advance...
Tue Oct 20 2009, 03:13 PM
hey chinmay...i am trying to interface JHD 162A with 89c51..i am facing the same problem that u faced with ur project..the display shows one line with blocks and other line blank..please take a look at my circuit..


[ Edited Tue Oct 20 2009, 03:27 PM ]
Tue Oct 20 2009, 03:24 PM



Tue Oct 20 2009, 03:25 PM
i am not using read lcd..so pin 5 is grounded...


[ Edited Tue Oct 20 2009, 03:26 PM ]
Tue Oct 20 2009, 03:29 PM
see if u hv burn d uc n u ddint get d display correctly den ...check wid my schmatic diagram once again or read the previous post dat i hv discused abt it here in this thread.
Wed Oct 21 2009, 12:52 PM
i have burned the code on the uc..i verified my diagram with ur schematics..it seems to match..if u could take a look at my circuit and tell me if the connections are right then i will be sure that there is some problem in my code.....

P.S. : pins 1 & 2 of lcd are also connected to GND and +Vcc respectively alongwith the pot..
Wed Oct 21 2009, 05:39 PM
well mohakjhaveri this is the common problem that ur facing:) because everyone who completed this project faced the same problems(me too )...not first tell me that the circuit u posted above...have u tried this on simulation software befor going towards hardware?....since ur not using read lcd ...have u made amendments in ur code according to this change?
Wed Oct 21 2009, 05:47 PM
dees r the pin connection from uc to lcd, chk ur soldering accoring to it. click on the image to enlarge it.





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