Re: tv vs. oscilloscope

Don Bowey wrote:
On 6/17/06 6:37 AM, in article
1150551472.377401.48990@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, "cbarn24050@xxxxxxx"
<cbarn24050@xxxxxxx> wrote:


Allan Adler wrote:

A long time ago I asked about what one would have to do to convert
a TV into an oscilloscope. > Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx>
* Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions
and
* comments do not reflect in any way on MIT. Also, I am nowhere near Boston.

No you cant do that. There are too many reasons to list, just forget
the idea.



Yes, you can do that, it's just complex.

Don

Still have the articles:
RADIO ELEKTRONICA 1973-11 and 12.

I don t have a scanner,and the language is Dutch.
For eye candy connect left and right loudspeaker
output of a stereo amp to the coils.(Disconnect
coils from main board)
To avoid burn in you should make sure that you
always apply signal,and adjust to a rather low
brightness.
The coil resistance is vert:~40 ohm, hor: ~4 ohm.
The article advises to use a spare set of coils,
connected to the mainboard to ensure proper
operation of the TV electronics.

For use as a low frequency scope you have to
build current output stages,and your frequency
range is limited.


Also you can combine a comparator and a video
source,compare the input signal with a 64 usec
sawtooth,and inject a small .2 usec pulse or the
comparator output itself into the video signal.
In this case no mods to the tv are needed, but
just a video input(scart or s.video). the
bandwidth can be rather high as in a sample
scope.
If you use a number of comparators/sawtoothes??
you can have a nice multichannel display.
A few high gain sensors, and you have your
own earthquake display system.

Also have a nice live insurance policy :) ;)

Have fun and be careful.
.