Showing posts with label TV. Show all posts
Showing posts with label TV. Show all posts

Tuesday, May 25, 2010

Gadgets - an RF modulator and some of the components needed to feed your computer a TV signal


Modulator WiFi DTV_0217
Originally uploaded by gtveloce
Here's a pic of an RF modulator sitting on a PC (middle, left). In fact I use the modulator to get an old TV to work with a set-top-box and DVD player. If - like on this TV - you don't even have a composite (or 'yellow video connector') input then you need an RF modulator to send the video signal from the modern output device to ye olde RF connector instead.

It's not ideal but with some mucking around it does work. You will have to tune the TV to the frequency of whatever you hook up and you may get a distorted picture. Alternatively, upgrade to a newer TV with at least a composite input.

Also in the pic is a set-top-box on a stick (middle right). Well it's an HD Digital TV tuner with USB connection. With that little device I can use the PC as a TV and Personal Video Recorder (PVR). With a new-fangled HDMI connection we can easily hook the PC to a TV, too, and use it as a monitor. Or (as I did) we can use older-style connections to pump the signal out to the TV. You may however have to use an adapter to bridge between PC 'D-shell' and yellow composite TV connectors.

Lastly, that's a WiFi USB 'dongle' right up the back.

Monday, May 24, 2010

Audio/video switch


from PC to TV_0484
Originally uploaded by gtveloce
The sort of audio/video switch you can use to switch between 2 devices. The output goes to a 3rd device.

In this example I hooked up the kid's PC to an old composite-only analog TV via a VGA feed (a standard PC video connection) to an analog PVR (or personal video recorder - a box with a hard drive in it).

The sound is sent through a Logitech 5.1 amp/speaker system via a 2-in 1-out switch (pictured) to allow a swap between the DTV-B (digital TV - broadcast) STB's (set top box) audio and the PC audio-out. It works!

That's the audio switch. I could have switched video through it as well but I use the analog PVR to do that and just feed the main stereo audio through here, with the other speakers going direct.