This RCA circuit has current limitation. The circuit is from an ancient American documentation making use of components of the era. The circuit includes the power supply.
This circuit is from a 90s Popular Electronics. It appears elsewhere on this site. Q1 can be any...
April 2017 - The Shields of Seed Grove Modules for Intel Joule can now be obtained from Mouser...
This circuit is from Motorola's Linear Databook from 1990. The integrated circuit and transistors are...