While researching the circuit design for the new control box, a number
of ideas for possible future improvements were generated. The circuit
currently requires a negative and a positive supply voltage to operate.
The circuit could be redesigned to operate on a single supply voltage,
which would simplify the power supply design. Another possible alternative
is to use a commercially available chip that converts a single DC voltage
into the necessary positive and negative voltages.
The power supply connector type on the control box designed by Marion
Systems is identical to the style of plug used for midi, and could very
easily fit into the wrong jack if the user was unsure as to where it
was supposed to be plugged in. The improved circuit will not have midi
jacks, however, it would still probably be a good idea to use a connector
that could fit only into a power jack.
Digital filtering should be considered in the future as an alternative
to analog filtering. It would simplify the hardware required, and would
allow for greater flexibility.