Shop OBEX P1 Docs P2 Docs Learn Events
Transmitting video? — Parallax Forums

Transmitting video?

MicrocontrolledMicrocontrolled Posts: 2,461
edited 2010-03-26 06:18 in Propeller 1
I have been reading about projects from great Propeller heads from all over the forum and I have not seen this, a way to transmit video from a camera (NTSC) from a robot to a base processor. If you can do this with a Propeller, then great, but if there is something else I need then please tell me, but I am on a very short budget. (As usual) Thanks for the help!

Micro

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Don't click on this.....

Use the Propeller icon!! Propeller.gif

Comments

  • Dr_AculaDr_Acula Posts: 5,484
    edited 2010-03-21 00:58
    Not sure about the propeller, but there are a whole range of video transmitters and receivers out there on ebay in the 'security' section. Transmitting on 2.4Ghz, the cameras are (almost) light enough to fly on a small helicopter. The receivers plug into a standard RCA yellow plug on a TV (or tiny 7" TV screen as used on the prop). Cost only a few tens of dollars. You can extend the range with a yagi, but I've got 100 metres no problem. You can greatly extend the range with 5W transmitters but not sure if they are legal.

    I've got one of these cameras on my gate transmitting 60 metres to a Rx and then into a TV capture card on a PC. There was a better picture with this system than with wires.

    This sort of thing $28 cgi.ebay.com/Wireless-Mini-CCTV-hidden-Color-Pinhole-Camera-SPY-Cam_W0QQitemZ280480872453QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item414df67805

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    www.smarthome.viviti.com/propeller
  • MicrocontrolledMicrocontrolled Posts: 2,461
    edited 2010-03-21 02:10
    Nice! Thanks!

    Micro

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Don't click on this.....

    Use the Propeller icon!! Propeller.gif
  • Beau SchwabeBeau Schwabe Posts: 6,568
    edited 2010-03-26 06:18
    microcontrolled,

    I haven't tried what you are suggesting, but it might just work. All the 4th pin is doing from the Propeller (When enabled) is sending a subcarrier frequency that mixes with the NTSC video generated from the Propeller. The subcarrier frequency can only span analog TV Channels 2,3,4, and 5 ... I would think, if you generate the correct subcarrier frequency and mix it via the proper resistor divider with a raw (external to the Propeller) Video signal, that you would essentially be doing the same thing (minus the video signal from the Propeller) and have a little video transmitter.

    Don't know, I'll have to try it myself.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
Sign In or Register to comment.