What you will need:
• an old CRT (almost all the work of b & w tv)
• some wire-band and pliers
• A bit of wire and an amplifier of some kind
• music to run threw zed amplifier
• basic electronics skills are helpful
It can work in two ways, depending on how it is configured, a horizontal line that is bent in waveforms, and a point that expands into a crossed circle. If you think you don’t want to make it by yourself then you can get it readymade. For you besttopreviewsonline expert Alex Stuart has written an article on the best oscilloscopes.
Step 1: The TV
AB & W TV should be easy to purchase on a yard sale, thrift store, maybe in someone’s garbage, or probably somewhere in your house. It seems like most all b & w TV works, but I have reported on color TV works (I’ve tried two to no avail), even a computer monitor can work to the scorcher.
Carefully open your TV. You should see a significant glass tube with a large circuit board underneath. At the end of the tube near you look at some wires coming out of the hose connected to the board (leave them alone), but in front of them, you should see thick coils of cables against the pipe and four wires that come out in the vicinity of these coils. Somehow grouped in two on each side.
Be careful because capacitors on the control board can store massive charges for days and the tube acts as a high voltage capacitor in most cases not fatal, but do not take the chances of its still possibly deadly.
Cut one of these four wires identified in the last step then turn the TV back on if you get a vertical line, then cut one of the horizontal coil wires. As you have guessed, a horizontal line means that you cut the vertical coil
Well, what you want to do is to put one of the coils with the wires that went to the vertical loop (the vertical supply) and put music in the other coil.
The most comfortable and most likely work to do would be to put the vertical supply suspended to the vertical coil and put the music in the horizontal coil.
But you could hook the vertical supply up to the horizontal coil for a more extended line I think that looks better, but on my newer that did not work. It’s hard to say how much less likely this is to work. Statistically, it has a 50/50 chance it only depends on the TV you can give it a try if you want.
Also, you could hook up both coils to your sound source for a point that expanded into a squiggly circle, as I said in the introduction and I did like it so much.
If you use horizontal supply, use a flat line that moves up and down with the music, which is pretty boring. This happens because the parallel supply operates at a much higher frequency and pulls the electron beam back and forth so fast that the music doesn’t have any time to move it before it has already crossed the screen.
Hopefully, you can solder wires isn’t necessary; you can easily twist the wires together. Taping over your connections is a good idea for insulation, but I didn’t even do that to make sure your cables aren’t in contact with anything when doing your case (or if you test it).
Once you have it, as you run it wires from the coil (s) you’re putting music in so you can close it until the fall of each wire gets speaker wire or whatever just put it somewhere on the edge of the case as you seal it again and it will take place.
Step 3: Insert the music
The Visualizer is a different speaker for any amplification of your use you may not want to use your most expensive amplifier
An average stereo or a guitar amplifier should be nice or an amplifier of some computer speakers to do.
Put the coil in series with a speaker on your system, if the volume needs to be so far as to move the line decently put the coil parallel to the speaker.
You will get a constant set of graphs of something like 1 to 0.1 milliseconds of the vibration of the music.
The vertical supply pulls the beam across the screen 100 to 1000 times a second the exact frequency depends on the TV. When the laser crosses the screen, the music signal efficiently pulls up and down the waveform of the audio (at 100 to 1000 Hz (times per second)) to give you a dynamic view of sound hopefully that’s a decent explanation.
And get a pretty useful scientific tool from the looks of it, too much big scary orbit for me.
A few ideas (no, you do not have to follow this), you could adjust the volume potentiometer to the output, build your driver (saw tooth), if the driver orbit on the TV refuses to work, like it on one Color TV I tried, With a color TV you may use a band-filter and have the wave change colors depending on the frequency. If the driver circuit refuses to work, maybe a dummy load (resistor) across the horizontal drive would solve the problem (I think that was as well from a comment). On specific TV’s you may be able to twist the plastic that coils the deflection to a horizontal line and also have fun with your oscilloscopes audio visualizing thing.