This generator is more complete than the previous one, being able to generate pulses as indicated in the table next to the diagram. In the original, a 556 was used which is a double 555.
This traditional circuit generates a 200 Hz sinusoidal signal. The frequency depends on the...
This preamp circuit was found in English documentation. Transistors are general-purpose, like the...
This circuit was obtained from the October 1977 Radio Electronics magazine. The meter is analog, and...