Trackpad actuator configurations for input device

A keyboard comprising:

• a keyboard housing;
• and
• a trackpad in the keyboard housing, the trackpad comprising:
• a touch assembly disposed in an opening in a top case of the keyboard housing;
• and
• an actuator attached to an inner surface of the top case of the keyboard housing by a first adhesive layer, the actuator configured to apply a force to the touch assembly to supply haptic feedback to the touch assembly.

A keyboard comprising:

• a trackpad;
• a capacitor bank;
• an electrical interface connected to the capacitor bank and operable to supply power to the capacitor bank at up to a first rate;
• and
• an actuator connected to the capacitor bank, operable to provide haptic feedback to the trackpad, and configured to draw power from the capacitor bank at a second rate greater than the first rate.