TV for oscilloscope

Abstract Dissonance · 2006-01-27T05:15:18+00:00

Anyone have any experience converting a TV into an oscilloscope?I have found the deflection coils and have tested them but I'm not really sure where to go from there. I know that for the horizontal I need a trigger(a sawtooth) but I'm not sure at what currents and voltages I need(with my variac hooked directly to it about 3 volts gives almost full deflection(which I measured about 0.05A).. but I'm not sure if thats right.)Is it simply a matter of putting an variable gain opamp on the vertical and a variable sawtooth on the horizontal? Seems like it would be kinda hard to measure frequency that way since I'd have to convert the resistance of the sawtooth into frequency.Any ideas?Thanks,AD