CRT Monitor Oscilliscope, Don't Think Twice

[Jullz01]

haha its cool

[stevebasset]

I remember doing this kind of thing when I was 11 years old on an old 405 line (UK) tv.

Great fun. Now run two oscillators to the X and Y and lookup Lissajous_curve !! :)

[TeamNES1]

Performa 575... great system, for a 68k computer. We used to have one as a family computer, and it was the second computer we ever bought. We got rid of it since then, but it's probably making some 10-year-old kid happy.

[hellsmaw84]

you know you can put some variable resistors and toggle switches to get different color effects. also rotate the yoke to get a horizontal line.

[WindowsAndMacintosh]

Was that an Macintosh TV in the background of when you were talking?

[ChaosHusky]

Ugh, apple geeks.

Anyways, nice to see the idea i had for the coils would actually work. I never got around to actually doing it. Will have to be doing this at some point, might use an old TV and disable the auto standby circuit so the white noise picture when it's untuned will work as an input.

What would be cool is being able to make two evenly spaced lines to input a stereo signal. If i used a TV, might be possible to use the built in speaker amp. Play better music!

[37474748]

nice mod man... nice nice.... will try that my self i think...

i can see you like computer... whats your fasted and most modified rig today? :D

5/5

[howardstern5]

Hey what kind of Mac is in the background in the beginning? It looks like a Performa 575.

[TellTheWorldAStory]

The white one on the left is a Performa 575. The black one that is on is a relatively rare Mac TV. Good eye!

[paliver]

Cool: World's first white color-scope!

[Decenium]

Bob Dilan?

[vinee94yo]

Try putting in a small amount of a\c voltage.You should see a 60hz frequency.

[kargaroc386]

or 50hz if you are on 240v

[DRNEGOLICIS]

240 is 60HZ

[RockeyDA]

Yours seemed to only have 1 line. when I do it thay always have 2

[antienjigglement]

I like it! You disconnected the horizontal yoke winding. Did you substitute an inductance for the deflection system? How did the monitor handle this? I've seen them blow the horizontal output transistor or produce insufficient high voltage, for lack of a horizointal yoke winding. Very nice! Play with high voltage! Not a prioject for those who don't know what electricity is! haha!

[desinfector]

MAny CRT devices have protection circuits that take effect when the deflection (h or v) is

faulty. Ive build a similar "oscilloscope" in earlier days using a second deflection system from another old device. So the protective circuits can be avoided quite easily just by connecting this second coil to the monitor.

[OoNCaLaMiTy]

what did u do now?

[OoNCaLaMiTy]

hey that server looks familiar oh yea maybe because i gave it to you.

[TellTheWorldAStory]

yeah... cause you're good like that. And in working on the projector, I looked down and thought "hey, why is that wire turning red?" then I realised I was bleeding profusely. So yeah.

[erat91]

does this work on the horizontally also?

[6p1p]

I think you can loose the yoke screw on the CRT neck and turn the yoke coil to 90degree, so it will scan horizontally. :-)

[AudleyNough]

Just turn the CRT thingy on its side.

[erat91]

hahahahhaha.... if you are not an engineer already you are future engineer for sure.

[AudleyNough]

No, just a woman.

[Bazoons]

I fucking love Bobbb

[austinminimon]

The funny thing is, when I looked up and say I had an email notifying me of this comment, I was listening to don't think twice. :)

[HubCityMuse]

I'm impressed!

[OrangesRCooll]

Wow, thats a neat trick lol

[buzzboy7]

Wow, thats pretty sweet Ted. I only wish I had a CRT that I didn't care about.

[TellTheWorldAStory]

But you have an eMac, which is nearly as worthless!

[dogcube]

can you build a couple tone generators and a duplexer?

[dogcube]

this is really damn cool

[kingkierantheiii]

haha mad