The ball is the tricky part. Here is what I have come up with so far.
The vertical motion of the ball is constrained by the floor and ceiling of the video screen. This is the easy part.
![ball vertical motion.jpg]()
A triangular waveform generator is used to output an analog voltage. This is fed into the gate of an FET (field effect transistor) used as a variable resistor that determines the duration of a monostable multivibrator. This gives the ball its vertical motion between the top and bottom of the screen. The second half of the monostable multivibrator determines the height of the ball.
(circuit diagram)
(video)
Stay tuned.
The vertical motion of the ball is constrained by the floor and ceiling of the video screen. This is the easy part.
A triangular waveform generator is used to output an analog voltage. This is fed into the gate of an FET (field effect transistor) used as a variable resistor that determines the duration of a monostable multivibrator. This gives the ball its vertical motion between the top and bottom of the screen. The second half of the monostable multivibrator determines the height of the ball.
(circuit diagram)
(video)
Stay tuned.