We found this circuit in a 1965 magazine. The circuit can be assembled with current equivalent transistors and the precision in generating the frequencies depends on the tolerance of the capacitors.
Using the ICM7556, dual CMOS version of the 555, this circuit generates triangular signals from 1 to...
We found this circuit in an English magazine from 1976. The magazine no longer exists, but just...
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...