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.
Combining an Ultra-Low Power MCU with an 802.15.4 Radio, the SAM R30 Enables Long-Lasting Battery...
This comparator with two Texas Instruments operators was obtained in a company application manual....
August 2017 - Mouser Electronics already has the Connect One Pico WiReach ™ SMTS Pico modules...