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.
Measuring capacitances and resistance this simple instrument was found in Radio Electronics...
The LM143 integrated circuit is a high voltage operational amplifier from National Semiconductor that is...
We found this circuit in the November 1985 issue of Radio Electronics magazine. It uses TTL...