Wirelessly Transmitting Using a CMOS Camera Module

Wireless & IoT
1

Hello Forum Users,

I have a question regarding CMOS Camera’s that I was hoping somebody could help me with. I want to know if my following logic makes sense and if my desired result is possible with the equipment that i have.

I would like to power the following CMOS Module

http://www.sparkfun.com/commerce/produc … ts_id=8739

And Transmit the data it acquires wirelessly using (RF Transmitter)

http://www.sparkfun.com/commerce/produc … ts_id=8945

And then Recieve the data using the following. (RF Reciever)

http://www.sparkfun.com/commerce/produc … ts_id=8947

Now, I know that the RF Transmitter works by sending whatever DIGITAL signal they recieve on the input pin to thier output and the Reciever works in an opposite manner.

Unfortuantely for me the CMOS module i have selected Outputs an ANALOG Signal as far as i can tell and correct me if i am wrong but with this current setup the signal will not be transmitted.

To recify this problem I am currently using a Pickaxe system with an onboard ADC (10 Bit Resolution) this IC will recieve the Analog signal from the CMOS Camera, convert it to a digital signal then output this signal to the RF transmitter wich is then sent to the reciever wich will then be sent to a DAC (digial to analog converter) on the reciever side wich is then sent to a tv.

My biggest concern is what type of coding is required to encode, then transmit/recieve then decode the signal without a significant loss of data. (If even possible with my current setup)

the DAC i am using is pictured here:

http://www.westfloridacomponents.com/mm … gory_Code=

Any advice and commentary on this issue will be greatly appreciated. Thank you in advance for your time.

(Also if anybody knows of a CMOS type camera that encodes and outputs its information digitaly instead of via an analog output that would also be greatly appreciated. however i’d still like to accomplish my above mentioned task with the equipment that i have.)

EDIT: Thank you for the Private messages. Pulse Position Modulation sounds like it may work well for what i have in mind. However i have no experience in this field regarding how to implement it. If anybody is an expert in this field and can provide an explination regarding this it would also help.

2

my guess would be that the rf transmiter and receiver ans also the ADC and DAC will not be able to send the huge amount of information coming from the camera at the correct speed.

You will need an extreemly fast ADC, a very high bandwidth RF link and A very fast DAC. The components you have choosen donot look like they would do the job at all.

best would be to send video in analogue mode using an analogue system with ample bandwidth.

after all these negatives, i am no expert, so I may be very wrong.

3

A/D sample rate too slow with this class of microprocessor

Bandwidth/data rate insufficient with referenced RF devices.

Need to step up ten or a hundred-fold.

Always simpler to send video as an analog signal (video sender products) on coax or wireless, then digitize at PC.

4

Thank you for the information regarding my topic :). I have since found a nice pair of transmitters and recievers that will work perfectly for sending analog video AND Audio for aprox $25.00 each.

Those transmitters can be found here. with good data sheets on the pin setup as well.

http://www.dpcav.com/xcart/home.php?cat … n=0&page=2

5

That’s a great resource. Thanks for sharing this information but as it’s an old post, there must be advancement in the technology. Do you have update in it??

6

Beware getting spammed up the wahzoo…

$50 video/audio/IR over RF

http://www.x10.com/products/x10_vk30a.htm

see also supercircuits.com