Hi, I am trying to build a VGA-to-scope converted as described in this website **broken link removed** which displays the computer screen on an oscilloscope in X-Y mode with Z input:
**broken link removed**
However, it does not work properly. The reason, as I figured out, is the absence of ramp output on X and Y axis (the z-axis output makes sense to me). I only got noises for X and Y axis.
The ramp generator used in the circuit is exactly the same as in this website
555 Timer-Ramp Generator - Electronic Circuits and Diagram-Electronics Projects and Design
**broken link removed**
However, I tried to build the standalone ramp generator with the specified capacitor/resistor values used and still can't get any output. Vout is always 0 volts.
Any ideas what I am missing? Can't believe I can't get something as simple as this working properly.
**broken link removed**
However, it does not work properly. The reason, as I figured out, is the absence of ramp output on X and Y axis (the z-axis output makes sense to me). I only got noises for X and Y axis.
The ramp generator used in the circuit is exactly the same as in this website
555 Timer-Ramp Generator - Electronic Circuits and Diagram-Electronics Projects and Design
**broken link removed**
However, I tried to build the standalone ramp generator with the specified capacitor/resistor values used and still can't get any output. Vout is always 0 volts.
Any ideas what I am missing? Can't believe I can't get something as simple as this working properly.