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Yes.All the Address pin for both encoder/decoder was tied low. I also connect the TE pin to GND for HT12E,but still no data receive at Rx. I'm not assuming that both encoder/decoder is damage because...

I already check my Dout and Din pin at HT12E/HT12D using Oscilloscope but the result show nothing .Only a long straight line shows at scope.It means No output/input from my HT12E and HT12D either I'm...

I use absolutely the same value of resistor in the PDF but the encoder/decoder still not function with direct connection.I can assure that Both Ground,Dout and Din pin was connected in the right...

Thanks for the reply.
I already test the holtek IC using direct connection but the result is still the same.No noise but The Rx cannot receive the data and my LCD just show static word "BUS15"....

Hello Steve,
Since I still receive noise..I decide to use Holtek encoder/decoder which is HT12E/HT12D. I construct the circuit following your advice and connect all data pins at HT12E/HT12D to port...

Hello Guys..Thanks for all the advice :D
Now my Rx module works fine in a short distance around 5-6 feet.I just add 10k pull up resistor at Rx data pin and 10uF at Vcc.But If I move more than 6...

It' s not the output from my LM741. At the moment my Rx data pin connected directly to port A.0. also not using pull up on vcc at that time. In your opinion., should I use filter??

I use oscilloscope to check the data pin for my Rx and Tx module without comparator and the result is not very good.The signal I got show a lot of noise especially at my receiver. You can see the...

yes, there's a digital oscilloscope at my lab. But at this time, my lab still not open for student. It's just 6.30 in the morning here..so, must wait for 2 hour before I can use it. :D
I will use...

ok..now there is 3 pin for comparator inside the 16F877A. How do I connect it with my
Receiver..?? I'm just a little bit confuse with C1out and C2 out which is port A.4 and Port A.5. What's the...

yes, the model is what I'm using right now. It says the output come with noise and it seems like the main problem.Is there any chance for the receiver to get the sending data clearly without noise If...

thanks for the advice mackrackit.I've tested my LCD before and I found nothing's wrong with it.Even I connect pin 3 directly to the ground, my LCD still can display variable words clearly.



hi...

Sorry for late reply guys,got a lot of homeworks to do. ; )
The fact is I have less information about my RF module.I just buy it from the nearest electronic store.Since I live here in Chiang Mai...

first of all..thanks mister_e for reply.I already change the code and increase my baud rate.But the result goes the same.My LCD still display nothing, but something unexpectedly happens, when I...

Hello everyone,
I have a problem with sending data using my RF module, I don't know what the problem is.I try to change the baud rate but nothing happens.Actually I want to send a character using my...

It's ok skimask, I understand what you're trying to say. I'm just new in the world of PIC and know nothing about it.Now I need to deal with PIC to finish my project. So, I just do reverse...

of course, I will learn something from it.Although I'm new with PIC and the coding but I will give a try.

THis code works.Thank you for Helping me.

hi everyone,
i'm a newbie here and have a problem with the coding for my 4x4 keypad.I'm using PIC16F877A and connect my keypad to port D. What i want to do is:-
when I pressed switch '1' at...