While trying to re-create the circuit from Instructables we tweaked the capacitors and resistors until it worked well with a 6v power source made from two 3V CR 2032 batteries.
After some hours of trial and error, were able to get the circuits lighting up to sound! Here is a video of our progress so far showing the varying light levels and 6v power source in action:
With the circuits working, we aim to bring the size down to fit on a single board. However, we have found some bugs/changes to be made in the final prototype:
- The 9v battery has better performance than the 6v supply, so this will be the power source of choice
- A variable resistor does not affect the circuit enough to accurately set sensitivity, so there will instead be a mechanical way to alter the angle of the microphones as needed.
- The LEDs are very directional, so these too will need to be adjustable to the viewers' comfort