which one of the following is used in holmes signals?
14534
Holmes signal - A mixture of calcium carbide and calcium phosphide placed in a container which reacts with water to produce gases (PH3 and C2H2) which burn and thus guide the ships in sea.
41609
It depends on where you are. At intersections with actuated signal controls, the button functions as a human detector, alerting the system to the presence of a pedestrian and requesting a “WALK” signal as soon as possible. ... And if the pedestrian signals are in “recall” mode, pushing the button does nothing.
574814
At the front of the HC-SR04 sensor, you can find two silver cylinders (ultrasonic transducers), one is the transmitter of the sound waves and the other is the receiver. To let the sensor generate a sonic burst, you need to set the Trig pin high for at least 10 µs.
1019795
A mixed signal oscilloscope (MSO) is a type of digital storage oscilloscope designed to display and compare both analog signals and digital signals. ... Signals may be connected directly to the oscilloscope's analog input channels or connected through an oscilloscope probe.
1464395
A PIR sensor detects the infrared light radiated by a warm object. It consists of pyro electric sensors which introduce changes in their temperature (due to incident infrared radiation) into electric signal. When infrared light strikes a crystal, it generates an electrical charge.
840778
The Throttle Position sensor measures the throttle position, which is controlled by the gas pedal. It is used to determine engine load and if it fails it can cause automatic transmission shifting problems.
712579
If phase modulation is used to transmit a digital signal, this is known as phase shift keying (PSK). If the signal is binary, the phase of the carrier is shifted between two positions which are 180° apart. This is sometimes known as phase reversal keying (PRK).
1131636
A railway signal is a visual display device that conveys instructions or provides advance warning of instructions regarding the driver's authority to proceed. ... Typically, a signal might inform the driver of the speed at which the train may safely proceed or it may instruct the driver to stop.
1310525
Unbalanced Cables. A balanced electrical signal runs along three wires: a ground, a positive leg, and a negative leg. ... XLR and TRS cables are used to transmit balanced audio from one balanced device to another. Unbalanced cables are less complicated, but they're much more susceptible to noise problems.
1022452
2 Frequency shift keying. If a digital signal is used to modulate a carrier in frequency, this is known as frequency shift keying (FSK). It is used in voice frequency telegraph systems (Chittleburgh et al., 1957) and for wireless telegraphy in the h.f. band (Hills and Evans, 1973). ... It may be termed non-coherent FSK.
220105
Each voice signal must contain the following three elements, given in the following order: function (such as hoist, boom, etc.), direction; distance and/or speed; function, stop command. The operator, signal person and lift director (if there is one), must be able to effectively communicate in the language used.
59409
['Amplitude refers to the height of the signal; it is measured in volts, amperes or watts.', 'Period refers to the amount of time in which a signal completes one cycle; it is measured in seconds.']
868915
Explanation: A monostable multivibrator can be used as a missing pulse detector by connecting a transistor between trigger inputs. If a pulse misses, the discharge trigger input goes high & transistor become cut-off and the output goes low. So, this type of circuit can be used to detect missing heart beat.
1308523
A Personal Locator Beacon (PLB) is a personal electronic transmitter used to alert rescuers that there has been a life threatening man over board (MOB) situation with a need to be rescued. When activated, the PLB sends out a signal on either a 406MHz frequency or Local Area System using 121.5MHz, VHF DSC and/or AIS.
1013624
Typically, two sensors communicate the transmission data to the vehicle's powertrain control module. The first sensor, referred to as the input sensor, monitors the speed of the transmission's input shaft. The second sensor is the output sensor, which monitors the output shaft speed.
1404761
The type of connector (XLR, 1/4″, 1/8″, RCA) does NOT indicate the signal level. The standard XLR 3-pin output connector on most mics can carry mic-level signals or line-level signals.
123401
This project uses a light dependent resistor. When light falls on the LDR sensor, then the resistance of the sensor decreases, which lead to activate an alarm to give an alert to the user. ... This triggers the alarm and shows a burglary attempt. A lamp is also used to indicate the theft when light falls on the sensor.