Found in American documentation from the 1980s, this circuit uses transistors from that time. It generates increasing and decreasing tones when we press and release the push button.
This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...
This circuit allows linear brightness control of an LED from an input voltage. The power supply must...
This circuit was obtained from my Mechatronics Sourcebook, published in the United States. In it...