This timing circuit was found in old documentation. The technology is CMOS. The supply can be made with voltages from 3 to 12 V. The time depends on R1 and C1.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
We found this circuit in a Japanese documentation from the 1960s. The frequency depends on the...
The output voltage of this circuit is proportional to the square root of the input voltage....