The circuit is from a Radio Electronics magazine from October 1987. The Triac must be equipped with a heatsink and the transistors are general purpose.
This circuit generates low-frequency sinusoidal signals. The variable capacitor is dual and the...
These circuits were obtained in an Electronics Now from the 90s. The integrated circuits are from...
This circuit for voltages up to about 20 V was found in a 90s Popular Electronics. The LED can be...