The integrated circuit used is uncommon today. We found this configuration in Motorola's 1990 Linear Databook. The triac can be any of the TIC series.
Suggested by Linear Technology, this 80's circuit makes use of an operational of the time but can...
This circuit was found at Popular Electronics. The speaker is of the greater than 100-ohm...
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...