How does an automatic rice cooker know when the rice is done?
413655
As long as there is boiling water in the container the cooker maintains a certain temperature ( in this case 100) and once the water gets exhausted the temperature raises to 212 F and then turns off. It is not only in rice cooker but in many other appliances
5064
Each chip has a crystal (oscillator) which has an exact frequency. Knowing the frequency people calculate how many executions it takes (from that frequency) to get one second. That is then calibrated (programmed) in the chip and … internal clock become live :)
403988
i know how to cook but what does os mean
1026553
Sony's first product was a rice cooker
593155
A light sensor at the top of the monitor gauges ambient light in the work environment and automatically adjusts the brightness of the monitor for optimum viewing. This takes away the frequent and tedious task of manually adjusting brightness on the screen; it is particularly beneficial in environments where light in the office is subject to change throughout the day.
551129
1 cup of water for every half cup of rice.  Bring the water to a boil and add a tbl spoon of virgin olive oil or coconut oil.  once water is boiling, add rice and turn the heat down.  Cover and simmer the rice on low for like 15 minutes or until water is gone... then season to your taste. good luck
168409
This again is a very vague question, I can only guess that the output stage shows the timing graphs. But unless you provide us with a link to a particular site or reference of what you are trying to ask, then we can not know the question exactly.\n\nPlease bear in mind you lose two points every time you ask a question. So make you answer as much as you ask !\n\nAnhar Hussain Miah
596000
Not unless a timer has already been set or some other parameter to make it go off.
813595
a thermistor is a resistor whose resistance changes with temperature. Because of the known dependence of resistance on temperature, the resistor can be used as a temperature sensor.\n\nSo, add a thermistor into a simple circuit with a power supply and a meter to measure current and you have the essence of a device to measure temperature.\n\nGet a bucket, fill it with ice and leave it till the ice has half melted. The temperatue of the water will be 0 degrees C. Pop in the thermistor (suitably electrically insulated) and measure the current.\n\nBoil a pan of water on the stove. As it's bubbling the water will be exactly 100 Degrees C, and again measure the current.\n\nUsing both values you can calibrate your new electronic thermometer!
536153
i believe the thing they used is called a calorometer. it involves burning the food and measuring the amount of energy that is released during combustion.
933181
Fresher Cocker?\n\nI think you mean "Pressure Cooker" in which case:\n\nA "pressure cooker" is a sealed presurized cooking vesel which allows the food to cook faster.\n\nThe basic principle is that by increasing the pressure within the vessel, higher temperatures will be achieved because the water inside will remain liquid (it will not boil as quickly).  The higher temperature will cause the food to cook more rapidly.  Here is a graph showing the relationship between Pressure and Boiling Point for water:\nhttp://en.wikipedia.org/wiki/Image:Water_vapor_pressure_graph.jpg\n\nA formula for calculating the vaporization temperature (boiling point) of water based on the pressure can be found about halfway down this page:\nhttp://en.wikipedia.org/wiki/Vapor_pressure\n\nThe simplest "pressure cookers" for home use have a solid metal cap which fits over a nipple fitting in the lid of the cooker.  The cap is in the shape of a "puck" or cylinder section of solid metal (having a diameter of about 5cm and a thickness of about 2cm).  A number of "blind" conical holes are drilled radially from the round edge of this puck towards the center, such that depending on which is selected the puck will meet the nipple over a greater or lesser area.  Because the mass of the puck is constant but the area on which the pressure is acting will be different for the different holes in the puck, the pressure will need to be greater or lesser in order to lift the puck and cause the excess pressure to dissipate.\n\nThe formula for the pressure achieved by the older "puck" style pressure valves is simply mass of the puck divided by area that the steam acts against the puck.  This will give you the maximum pressure (in force per square area) that can be achieved inside the pressure vessel before the puck allows some vapor to escape, limitting the pressure to that value.\n\nMore modern home pressure cookers simply use an adjustable pressure valve such as a pressure regulator to set the internal pressure.  The formula for a spring-based pressure regulator is similarly calculated by dividing the (adjustable) force of the spring by the area of the valve pressure plate.  When the internal pressure excees this value of force per square area, the pressure plate will be pushed against the spring enough to open the valve and some vapor will escape, maintaining this constant pressure.
195741
Electronic fuel injection uses a system of sensors to measure fuel dosage and squirt atomized fuel into the intake of an engine through a system of injectors.\n\nThe main sensors needed to control an engine are intake air mass, throttle position, and engine speed.  Additional sensors that improve operation include oxygen sensor in the exhause (also called a lambda sensor) to make fine adjustments to avoid running rich and knock sensors in the head to avoid running lean.  There are many different types of systems, but most use those sensors.  One system I worked with, which was an unusual setup intended for a race car built in the late 80s used a manifold air pressure and manifold air temperature instead of an air mass sensor, since air mass can be calculated from temperature, pressure, and engine speed, in theory, at least.  In actual use, it was a very unstable system.  Some more modern systems use direct injection into the cylinder, but most inject into the intake manifold right above the intake valve.  Some systems  inject into the throttle body with a limited number of injectors, but most use a metod called sequential multi-port injection in which injectors are above the intake ports, and timed to intake valve opening.   \n\nThe basic method of operation is that if you know the amount of air going in, the speed of the engine, and the position of the throttle, an enrichment map stored on a computer chip can be used to provide the correct fuel dosage for those operating conditions.  The injectors are plugged into a set of fuel lines held at a constant pressure, and the rate of fuel passing through the injector at that pressure is known, so by keeping the injector open for a given period of time provides a known mount of fuel to each injector.  Special case enrichment, like in the case of a turbocharged engine where fuel consumption per cylinder firing can be highly varaible depending on boost level, the injector can be held open longer, or a second injector can be used for on-boost enrichment, depending on the design.
716782
mine does also when I shut it down and do not let it finish shutting down before i close the lid.
975165
It depends on the centre frequency and bandwidth of the IR detector.  Glass will absorb certain IR frequencies, very often IR detectors use this as they do not wish to see beyond windows which would cause false alarms.
891400
* There are horizontal and vertical rows of electrodes below it that form a grid. These layers with electrodes are charged with a constant alternating current (AC). \n\n    * As the finger touches the electrode grid, the current is interrupted and the interruption is detected by the circuit board. \n\n    * It works by sensing the capacitance. The human finger is an electrical conductor, and when you place your finger on a TouchPad, a tiny capacitance forms between your finger and the metal electrodes in the TouchPad.\n\n    * The TouchPad sensor's sensitive analog electronics measure the amount of capacitance in each of the electrodes. By measuring which electrodes have the most capacitance, the TouchPad can locate your finger to an accuracy of better than 1/1000th of an inch.
245048
look on the top of the controler, near the wire or sensor.
126026
Detects carbohydrates