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.
This well-known configuration that appears elsewhere on the site is from an English documentation. In it,...
Found in Popular Electronics from the 90s, this circuit generates a 1 kHz signal. The coil is from an...
This variable frequency oscillator generates signals that have a recurrence frequency determined by...