Discussion in "8051 Discussion Forum" started by    Gastonio    Sep 9, 2010.
Wed Jan 26 2011, 03:08 pm
#61
Wow, you are so right!!! That's woderful. Thank you for very good advices! I changed powering from USB to a 4.5V battery and LEDs started to flash when pushing buttons.
Now I'll try to inteface them to MCUs and see how it works.


[ Edited Wed Jan 26 2011, 03:12 pm ]
Wed Jan 26 2011, 07:56 pm
#62
hi Gastonio
remember
usb port has less current rating its hardly on an led
so for practical cases do not use this power supply
some time usb port damage if load is high
ru now not interface it with mcu ?
 Gastonio like this.
Thu Jan 27 2011, 01:47 am
#63
Hi, Majoka.
I've interfaced encoder and decoder to MCUs. The good news are that receiver's RD pin goes high when I push button on the transmitter, however LEDs don't flash. I used your wiritten program.
Thu Jan 27 2011, 12:06 pm
#64
that code works for another guy
anyhow there is a decoder VT pin what status about that
Thu Jan 27 2011, 06:48 pm
#65
Decoder's VT pin goes high when I push button on the transmitter. Maybe there's still a problem in power supply.
Thu Jan 27 2011, 07:27 pm
#66
It worked The problem was that I didn't conncet P2 free pins to ground. Now when I have time, I'll try to conncet LCD and send symbols.
Thu Jan 27 2011, 09:10 pm
#67
great news congrats!
do post the updated schematic and code for working wireless so that if anyone has similar problem we can link your post to him/her.
Thu Jan 27 2011, 09:33 pm
#68

The problem was that I didn't connect P2 free pins to ground


i think u not done it at rx side
am i right ?

VT pin is for valid transmission it goes high when it receive valid data
@ ajay
here is same type thread for reference
http://www.8051projects.net/forum-t37768-0.html
Thu Jan 27 2011, 10:30 pm
#69
On both sides, too much wires here and I didn't notice. I'll post schemes as soon as I'll get everything working because for testing I just used Majoka's scheme from the topic which he posted above. I think I'll face more problems, however, I feel happy because wirless transmission works fine.
Fri Jan 28 2011, 08:47 pm
#70
great news Gastonio


[ Edited Fri Jan 28 2011, 08:48 pm ]

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