Other projects

Some issues in data transfer using light.need help

5 948


The basic stages of transmitter are as follows:
USART(serial data) --> FSK modulator-->Led fast switching circuit

The switching circuit is working fine and i have transmitted and received data successfully without modulation.But now i need to add some digital modulation

The issue is that  if i send serial data to LED then there is visible blinking of LED but since i need no flickering therefore i have thought of using the modulation stage to remove the blinking but the problem is that whlie desiging FSK modulator there are 2 methods  have tried

A) Using 555 IC as shown below, but the circuit is not providing the desired frequency also the circuit becomes complex so does the demodulator, so i have discarded this method

B) USING Softmodem in Arduino.

I have tried using arduino as modulator by following the steps as shown on http://learn.linksprite.com/ardu ... ta-communication-a/  but using this modem ,there is still flickering of LEDs when fed to switching circuit.

There is another way to use XR-2206 ic for desiging FSK modulator but it is not available in my region.

What should be done to use FSK modulation in the circuit. Or suggest some another digital modulation technique (note that the message and carrier signal both needs to be digital).

Thanks in advance.

Why not just wire up a NOT gate and MOSFET driver with a MOSFET. Just set the UART speed high enough so the eye cannot see the flicker. Then at the receiver receive the light signal and use a NOT gate to invert it

Also why modulation?

Hi. Any data management and recovery issues, you can bring them right to iPhone Manager.
See more: http://www.passwordmanagers.net/

My brother was ordering college essays online and I was always reading them, just in case, so what was new for me was that light isn't always responsible

roshe run
air jordan 4
kate spade outlet online
tom ford sunglasses
lebron 15
yeezy boost
air jordan
asics kayno
adidas ultra boost
crazy explosive
dior sunglasses
nba jerseys
asics shoes
fitflops sale clearance
nike air force 1
chrome hearts
adidas nmd
off white hoodie
curry 3 shoes
true religion jeans
adidas eqt support
yeezy boost 350
nike roshe
true religion
bape hoodie
golden goose sneakers
longchamp outlet
adidas tubular
nike flyknit racer
atlanta falcons jersey
curry 3
michael kors outlet online
gucci belt
nike air zoom
nike football boots
timberland boots
links of london
jordan retro 12
nike air huarache
nike running shoes
russell westbrook shoes
vibram fivefingers
adidas crazy explosive
paul george shoes
nike air max 2018
tory burch shoes
nike air max 2017
nike outlet store online shopping
hogan outlet online
reebok shoes
roshe shoes
nike flyknit
air max 90
jordan shoes
nike shoes for men
yeezy boost 350
adidas tubular
vans outlet
adidas shoes
adidas yeezy
michael kors handbags
longchamp handbags
golden goose
real jordans for sale cheap
michael kors outlet online
zx flux
adidas yeezy
kyrie 4
lacoste outlet
curry 4
chrome hearts
michael kors outlet
vibram five fingers
nike sneakers
yeezy boost 350
nike air force 1
adidas eqt
nike roshe
ultra boost
jordan 11 retro
asics running shoes
calvin klein outlet
nike huarache
longchamp bags
prada glasses
adidas stan smith sneakers
ysl handbags
hermes belt
adidas outlet
nike outlet
louboutin shoes
air presto
retro jordans
michael kors outlet
adidas nmd
yeezy boost
nike air max

You have to log in before you can reply Login | Sign Up

Points Rules