[sdiy] cool TV/oscilloscope hack..

[Luís Marka]

I had a very old circuit (I built it when I was, like, 11 or 12 years 
old) that turned my TV into an oscilloscope. Presto, I remember now, it 
was in 86... So I was 14 at the time. Anyway, it worked with a 555, a 
741 and a BF494 as a RF oscillator. The TV needed no hack at all! The 
circuit had a sort of an atenna to sync the 555 to the high voltage TV 
oscillator, and generated an "interference" on the TV screen via the TV 
antenna (it was quite a while ago, you know... I am pulling this from 
memory. Actually I don't remember if I had to plug anything on the 
antenna... don't really recall!). It was OK for audio - but the wave was 
displayed from top to bottom, instead of left to right. And oh it was 
quite some fun!

Jay Vaughan wrote:

>
>> but about "the first circuit bent tv"... arhhh i hate some people. 
>> this is
>> the same person whose claim to fame was "the first circuit bent 
>> ipod", which
>> was a guitar keychain inside an ipod's shell, no ipod guts at all! 
>> someone
>> should gather all the links showing how to make 'wigglevision' and
>> oscilloscopes out of TVs and send the links to him :P
>
>
>
> it irked me too, i guess it was sorta one of the reasons i figured i'd 
> waste synth-diy's time with it: in case anyone in this mob had 
> actually done anything 'better', (not necessarily earlier).. or 
> otherwise interesting.  on the one hand.  on the other hand, i knew 
> it'd be a 'bitchslap' topic, as in 'why i oughta...'
>
> its not a beam-swinging match, by any means, or at least i know some 
> of us don't have much beam to swing, but the whole 'built an 
> oscillioscope out of <blah>' vibe is pretty interesting, and having 
> just done my first 'serious' vocal session staring at pretty techRTA 
> visualizations of my track, i can say that there's tons of room in the 
> 'whoo pretty lights' realm of synthesis.
>
> it ain't all about rusty caps or bloodied transistors, you know .. i 
> wish i knew how to turn my TV's into scopes with the rubbish i have at 
> hand, it'd at least be a functional use of the damn things for a 
> change .. the TV's i mean, not my hands.
>


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