Pira.cz Technical Forum

General Category    (This section is not monitored) => FM Transmitters, RF Amplifiers => Topic started by: radium98 on October 18, 2015, 08:23:45 am

Title: pira 5w txer LCD connection
Post by: radium98 on October 18, 2015, 08:23:45 am
Hi can you help me for connection from pcb in J5 to the lcd i mean wich pin to wich pin please thanks.
Title: Re: pira 5w txer
Post by: radium98 on October 19, 2015, 04:53:13 pm
please advise me some help with schematic or real wiring from tx to lcd  :-[ :'(
Title: Re: pira 5w txer
Post by: Jan on October 19, 2015, 05:13:25 pm
This is a standard connection to the HD44780-based LCD, i.e.:

1   GND
2   Vcc
3   Vee (contrast)
4   RS
5   R/W
6   E
7   DB0
8   DB1
9   DB2
10   DB3
11   DB4
12   DB5
13   DB6
14   DB7
15   LED+
16   LED-
Title: Re: pira 5w txer LCD connection
Post by: radium98 on October 20, 2015, 09:55:54 am
Dear Jan thanks for the reply sir.

but i am a bit confused yes this configuration pin i know it afte a datasheet look but my question from the 5w pll pira.cz tx is it :pin 1 from tx  to pin one on lcd and so on ? please confirm .
thanks regard
Title: Re: pira 5w txer LCD connection
Post by: radium98 on October 21, 2015, 06:26:07 pm
any more help please.
Title: Re: pira 5w txer LCD connection
Post by: Host on October 22, 2015, 10:28:28 am
Pin 1 on the TX module to pin GND on your LCD.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on October 22, 2015, 12:14:37 pm
Thanks Host.So pin to pin.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 14, 2015, 09:01:31 am
please help me i am so bored from this statut .

i only cab see dots on the screen i have vfo i have output but no pll at all i have used 16f627 and not 16f627a does it matter ?

second olease help with the connection maybe i have made an error .

(http://i.imgur.com/nWFSNQN.jpg)

(http://i.imgur.com/A6cfrmj.jpg)

(http://i.imgur.com/XbQ6Qxk.jpg)

(http://i.imgur.com/0OvfQmB.jpg)

I am waiting ure help please to invastigate .

Title: Re: pira 5w txer LCD connection
Post by: Jan on November 14, 2015, 09:06:33 pm
The LED must blink on power up and each time you press any button. If this basic functionality is not present, it is premature to solve LCD or PLL as the PIC is not working at all (damaged or not programmed successfully).
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 16, 2015, 02:26:36 pm
thanks Jun i will change pic and i will reprogram again but one question please consider to tell me the pins of the lcd one by one from the tx board
eg : 1 to pin one of lcd ground

because i have i think a doubt of them.

thanks
Title: Re: pira 5w txer LCD connection
Post by: Jan on November 16, 2015, 10:44:36 pm
Usually the pin numbers are equal but there are some LCD modules on the market which have different pin assignment. However I don't think this is your case.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 17, 2015, 10:42:22 am
Jan as i see on the schematic from pin 1 to 16 its okey but all of them are used from the transmitter to the lcd are they in order .i am unable to see pira on the screen .please can u take a closer picture for conection between lcd and transmitter thanks.BTW we bought 2 pieces of pira175 last year we plan and 3 mini rds we plan to buye in the next year a rds
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 17, 2015, 01:51:48 pm
Jan you are right the led wasnt blinking flashing at startup the pic was burnt out now i get a new pic16F627 with xtal 6.4mhz succussfuly hex loaded i have little flashing at start up but i still have dots only when i put the lcd so my connection are wrong please help me in :-[ :-\ :'(
Title: Re: pira 5w txer LCD connection
Post by: Jan on November 17, 2015, 08:26:56 pm
Some wire to LCD is probably broken or there's a short circuit somewhere. I think that any multimeter with beep function will help you better.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 18, 2015, 09:32:06 am
Jan bro we have a miss understand in between.its not a short circuit somewhere the problem is only i have mistaken some data wire so give them to me please .wire wire from tx to lcd .
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 18, 2015, 07:34:44 pm
i dunno what is the problem i need wire to wire connection in invastigate pleaaaaaaaase. :'( :( see my pictures
Title: Re: pira 5w txer LCD connection
Post by: Jan on November 18, 2015, 08:00:32 pm
I have no idea what else you need. The wiring has been already published in this thread. There are pin numbers 1 to 16 on the transmitter's connector and pin numbers 1 to 16 on the LCD connector. Everything you need to do is to connect 1 to 1, then 2 to 2 etc. What I see on your last photo is something far away from the working connection.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 20, 2015, 11:27:32 am
please jan if you can take me a close pictures for the lcd of the transmitter you have made so i can see the connection clearly .thanks btw how i will connect pin to pin when i can see 4-5 pins to ground and i must connect them on lcd where is no ground
Title: Re: pira 5w txer LCD connection
Post by: Jan on November 20, 2015, 03:16:02 pm
Ok, so here's the connection:

1 - 1
2 - 2
3 - 3
4 - 4
5 - 5
6 - 6
7 - 7
8 - 8
9 - 9
10 - 10
11 - 11
12 - 12
13 - 13
14 - 14
15 - 15
16 - 16

16 wires total.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 21, 2015, 09:20:53 pm
heheheh Thanks JAN i am sorry .i get new wires and i will recheck all sorry for disturbing you man .Great help
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 23, 2015, 08:26:57 am
 :D ;D Jan rewiring again with new good connection i can see the frequency on lcd with pira.cz.
Bad news i have VCO but not locking on any frequency i will rewound L1 i think it must be 4 wounds and not 3 i use single side pcb i will let you the results thanks.
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 23, 2015, 07:31:32 pm
https://www.youtube.com/watch?v=ifyUJ71V3Z4&feature=youtu.be

thanks have some little modifications after :)
Title: Re: pira 5w txer LCD connection
Post by: radium98 on November 25, 2015, 06:07:54 pm
Hello again what do i need as a simple software to put my name at startup i want to try that please help me
Title: Re: pira 5w txer LCD connection
Post by: radium98 on December 01, 2015, 06:23:49 am
any help ?
Title: Re: pira 5w txer LCD connection
Post by: radium98 on December 11, 2015, 08:27:14 pm
https://www.youtube.com/watch?v=lu7aWDGs1IQ&feature=youtu.be

help me pleaseeeee to put reve fm REVE FM at start up power up tx