Another point worth noting: if the first LED is blue (or white for that matter), the first step will require a significant power to begin to light up.
This remains valid for both the OP's version and mine.
At least 2 volts peak will be required, which is quite loud, even with relatively inefficient speakers. Using green LEDs would halve the threshold, and is probably more sensible
This remains valid for both the OP's version and mine.
At least 2 volts peak will be required, which is quite loud, even with relatively inefficient speakers. Using green LEDs would halve the threshold, and is probably more sensible
