The integrated circuit used in this circuit from a 1987 documentation is no longer common today. This circuit can generate a multitude of different sounds and this circuit is an example of application.
This low-current power supply was obtained in Japanese documentation from 1968. The currents are...
This circuit can operate with 27 MHz transmitters, having been found in a Japanese publication from 1967....
This circuit is from the National Semiconductor CMOS manual of 1977. What this circuit does is to...