NOTE: The R1 value is chosen for a dimly lit, red 7-segment display. The R2 value is chosen for a dimly lit red LED. Experiment to find values for R1 and R2 that suites your preference.

NOTE: The PCB is shown with traces facing down.

The speaker terminals should be connected to the opposite side of the PCB.

Before soldering the speaker permanently, use a multimeter to measure it's current draw from MCU pins 7 and 8. If current draw on each pin exceeds 40 uA, use the configuration in the next slide (step 9) instead.

With this configuration only MCU pin 8 connects to the speaker. The other speaker terminal connects to ground.