This is one of the many versions of this oscillator that we have on our website. We found it in an article in Radio Electronics magazine from January 1987. The frequency depends on C1.
Recommended for automotive use, this circuit is used to indicate the activation of functions. The...
This very high input impedance preamplifier is from a publication of 1977 but can also be mounted...
This circuit was found in a Popular Electronics of the 90s. The resistor R4 determines the load...