This 5 V power supply for TTL, Shields and microcontrollers is old, and the components can be replaced by modern equivalents. Transistor Q1 can be a TIP31 and Q2 can be a BD135.
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...
This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented...