25. Self-service
A. Make the object service itself and carry out supplementary and repair operations.
Example:
• Scandisk or virus software.
• A soda fountain that runs on the pressure of the carbon dioxide that is used to “fizz” the drinks. This assures that drinks will not be flat and eliminates the need for sensors.
B. Make use of wasted material and energy.
Example:
• Use animal waste as fertilizer.
• Use food and lawn waste to create compost.
• To prevent wear in a feeder that distributes an abrasive material, its surface is made from the abrasive material
• In an electric welding gun, the rod is advanced by a special device. To simplify the system, the rod is advanced by a solenoid controlled by the welding current.
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