Equivalent transistors can be used in this circuit for automotive applications in the 1980s. The frequency is given by the capacitor and the current of the lamp depends on the LM195 transistor.
We do not know exactly what sound a flying saucer makes, or if it makes a sound! But this is not...
This circuit was published in an English magazine from 1977, but it can be easily assembled since...
This circuit for modeling was found in a 1980s documentation. The SCR can be the TIC106 and the...