This circuit is from the Linear Applications Handbook of the National Semiconductor of 1994. Transistors are common, but the integrated circuit is not easy to obtain today.
This circuit for light modulated in frequency (FM) was found in documentation of the 90s. SUS is...
This traditional circuit is from a 1972 RCA technical publication. The circuit can be developed with...
This traditional oscillator circuit that can be found elsewhere in this section uses general...