Timer 555 (CB8715E)

Suitable for dual applications, this timer was found in a 90s Popular Electronics. The circuit activates a buzzer with an internal oscillator.

Single Cell Barometer (CB4913E)
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...
VCR Amplifier (CB25269E)
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
Speed Control LM13080 (CB4859E)
The integrated circuit used in this project is not common today. It was found in a 2000...