Parts list for controller unit.

This table lists all parts required to construct our controller. In addition to the above parts, the user will need to source or build a suitable case. We recycled an old case from a previous project. Many of these parts can be sourced from other suppliers, we simply list convenient US suppliers. Prices are rounded to the nearest USD and correct at the time of publication. Total cost of the above components is $471. *A single 24 V 2 A power supply and a 9 V regulator would, of course, also work and cost less.