pr11 help anyone?

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Re: pr11 help anyone?

Postby dclim » Sat Sep 29, 2012 2:52 am

Recently js brought PR11 for hobby
there is question to ask and discus.

as i discover the PCB circuit :
why the 2x16 LCD pin 1(GND) pin 2 (Vcc) pin16(V-) are not connected ?
and after observe... the PCB circuit is not connected to ground.. if not mistaken ??
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Re: pr11 help anyone?

Postby yonghui » Sat Sep 29, 2012 7:02 pm

i think u can download and check the schematic.
its quite hard to clearly see the connection with bare eyes, especially multilayer pcb.
probably u can check with multimeter for the connection
thanks&regards,
yh
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Re: pr11 help anyone?

Postby dclim » Sun Sep 30, 2012 4:03 pm

Photo DeLETED 1
Photo Deleted 2

this is the PCB layout.... because i am going to modify the circuit to add-on other features by myself
so i need to learn or research how this PCB layout been draw and my modification can been carried on...

as the above figure show , the LCD PIN 1 until 16 ...
the PIN 1 , PIN 2 ,PIN 16 seen like not connected ..
or this LCD is common ground ?? or the double layer PCB ???

2. and the (-) from adaptor seen like not connected to any pin... or this is PCB layer problem ?


if the above PCB layout need to remove due to copyright of cytron, pls do inform me .. i wil remove it asap .
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Re: pr11 help anyone?

Postby yonghui » Sun Sep 30, 2012 10:37 pm

hi,

from the picture, its a double layer PCB.

pin no1 of the pcb is connected to gnd through the polygon pour. last pin of LCD also same connected to gnd through polygon pour.

pin 2 of LCD i think is connected to v+ on top layer.

pin - of adaptor connected on bottom layer to the polygon pour.
thanks&regards,
yh
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Re: pr11 help anyone?

Postby dclim » Mon Oct 01, 2012 2:23 am

polygon pour ....thanks for the new knowledge.
and thanks for your reply , it helps me alot...
that mean the whole PCB is following the schematic to draw out .
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Re: pr11 help anyone?

Postby robosang » Mon Oct 01, 2012 8:15 am

You cannot determine the connection with just bare eye, normally you need to check with multimeter. :mrgreen:
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Re: pr11 help anyone?

Postby black_smtk » Wed Oct 03, 2012 6:00 pm

i want to generate pwm. is
//comparator setting
CMCON and CVRCON is needed to generate the pwm? what is its function in pwm? what it do?
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Re: pr11 help anyone?

Postby yonghui » Wed Oct 03, 2012 9:50 pm

u can easily find what is PWM by googling it.
u can refer the datasheet of PIC if u are using it, for the PWM generation.
thanks&regards,
yh
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Re: pr11 help anyone?

Postby black_smtk » Thu Oct 11, 2012 11:14 pm

can someone show the correct code for pr11 if i want to display my name on lcd first before it start reading the temperature? i actually have study the code from website but still cannot relate it to pr11. help anyone?? :?:
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Re: pr11 help anyone?

Postby hyng » Sat Oct 13, 2012 3:43 pm

black_smtk wrote:can someone show the correct code for pr11 if i want to display my name on lcd first before it start reading the temperature? i actually have study the code from website but still cannot relate it to pr11. help anyone?? :?:


What is your clue? Have you come out with anything?
just display your name before the infinity loop. You can put some delay after the name and before the infinity loop for the LCD to display the name for a few seconds.
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