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2. Water timer - Wikipedia

   en.wikipedia.org/wiki/Water_timer

   The solenoid/diaphragm timer uses more battery power throughout the "on" cycle because the solenoid must be actuated the entire time that the water flow is "on". The ball valve timer using the motor and gear actuator only uses more battery power during the few seconds that motor is used to turn the water flow on or off.

3. Hose clamp - Wikipedia

   en.wikipedia.org/wiki/Hose_clamp

   A hose clamp used to hold the leather in place while tying-in the bag of bagpipes. They can also be used in a similar way, as a simple means for the transmission of small amounts of power. A short length of hose is clipped between two shafts where vibration or variations in alignment may be taken up by the flexibility of the hose. This ...

4. Orbit Irrigation Products - Wikipedia

   en.wikipedia.org/wiki/Orbit_Irrigation_Products

   The DripMaster line is designed for delicate drip-water applications in areas with special needs (e.g., gardens, flower beds, container plants, trees and ground cover). Hose-end applications are met in the SunMate product line, including sprinklers, timers, pistols, nozzles and wands.

5. Cam timer - Wikipedia

   en.wikipedia.org/wiki/Cam_timer

   Using feedback, external time delay, and other sensory circuits, it is possible to build an electromechanical state machine using a cam timer. These are common in washing machines, where the cam timer runs in phases, but also stops and waits for external signals such as a fill level sensor, or a water heating temperature sensor.

6. 555 timer IC - Wikipedia

   en.wikipedia.org/wiki/555_timer_IC

   Positive supply: For bipolar timers, the supply voltage range is typically 4.5 to 16 volts (some are spec'ed for up to 18 volts, though most will operate as low as 3 volts). For CMOS timers, the supply voltage range is typically 2 to 15 volts (some are spec'ed for up to 18 volts, and some are spec'ed as low as 1 volt).

7. Water clock - Wikipedia

   en.wikipedia.org/wiki/Water_clock

   A water clock uses the flow of water to measure time. If viscosity is neglected, the physical principle required to study such clocks is Torricelli's law. Two types of water clock exist: inflow and outflow. In an outflow water clock, a container is filled with water, and the water is drained slowly and evenly out of the container.