Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This circuit was obtained from an American documentation from the 90's. The components can be...
We found this simple music box circuit that can also be used in a musical bell in a 1991...