This circuit can work with the previous one generating signals, that can be decoded by it. The circuit is based on a common integrated circuit and the frequency is adjusted in the 20k trimpot and the intensity in the output trimpot.

This circuit can work with the previous one generating signals, that can be decoded by it. The circuit is based on a common integrated circuit and the frequency is adjusted in the 20k trimpot and the intensity in the output trimpot.