In this circuit, the integrated amplifier used is uncommon today. The circuit is from an American documentation from the 70's making use of a power transistor for output. A TIP32 can be used.
This circuit is from a Motorola documentation from 1968. The integrated one is an operational of...
This circuit is from a publication from the 50's. Inductive components are critical, and...
This flasher was originally intended for Christmas tree lamps. The circuit is from 1974 and uses...