5 V Omron G2RL relay driver PCB using an MMBT2222A low-side transistor, input terminals, flyback diode, and screw-terminal relay output.

Two-stage 12 V common-emitter small-signal amplifier using MMBT2222A transistors, with a 14.0 MHz single-tuned output stage, fixed 510 ohm load, and RF test headers for input, interstage monitoring, and output.