an1686 application note
... in case of anomalous power demand from the load (exceeding the peak power, e.g. due to a short circuit), converter's shutdown must occur within 10 ÷100 ms. A power peak lasting 0.5 s is too long to be handled with just a reinforced output capacitor bank: as a matter of fact, after few ms the convert ...
... in case of anomalous power demand from the load (exceeding the peak power, e.g. due to a short circuit), converter's shutdown must occur within 10 ÷100 ms. A power peak lasting 0.5 s is too long to be handled with just a reinforced output capacitor bank: as a matter of fact, after few ms the convert ...
EUP2518 White LED Step-Up Converter In TSOT-23 Package
... CAP and Inductor Selection The recommended value of inductor for 2 to 6 WLEDs applications are 10µH to 47µH. Small size and better efficiency are the major concerns for portable device. A 22µH inductor with low DCR (Inductor resistance) is recommended to improve efficiency. To avoid inductor saturat ...
... CAP and Inductor Selection The recommended value of inductor for 2 to 6 WLEDs applications are 10µH to 47µH. Small size and better efficiency are the major concerns for portable device. A 22µH inductor with low DCR (Inductor resistance) is recommended to improve efficiency. To avoid inductor saturat ...
Bertan 230 Series of High Voltage Power Supplies, Spellman High
... Units up to and including 5kV can be provided with differential outputs capable of floating up to ±2kV from ground. Voltage programming and monitoring functions are normally referenced to ground. Current monitoring and metering is eliminated. Replace “R” suffix with “F” for this option. Output conne ...
... Units up to and including 5kV can be provided with differential outputs capable of floating up to ±2kV from ground. Voltage programming and monitoring functions are normally referenced to ground. Current monitoring and metering is eliminated. Replace “R” suffix with “F” for this option. Output conne ...
introduction - University of Toronto Physics
... 3. Do the same as in 2., observing V and VL for the L-R circuit, for a value of R between 100 and 1.0 k, and using the coil provided. (L for this coil is between 30 mH and 300 mH.) From the observed time constant, estimate the inductance of the coil. (Note that in part 3., the coil is not a pure ...
... 3. Do the same as in 2., observing V and VL for the L-R circuit, for a value of R between 100 and 1.0 k, and using the coil provided. (L for this coil is between 30 mH and 300 mH.) From the observed time constant, estimate the inductance of the coil. (Note that in part 3., the coil is not a pure ...
milliamp calibrator model 334a
... the 334A to supply the 4 to 20 mA control signal to stroke the valve. Select SOURCE to output using the internal batteries as the power souce or 2WIRE SIMULATOR to stroke the valve using an external power supply. 1) Disconnect the 4-20 mA control wires from the Current-to-Pressure (I/P) converter or ...
... the 334A to supply the 4 to 20 mA control signal to stroke the valve. Select SOURCE to output using the internal batteries as the power souce or 2WIRE SIMULATOR to stroke the valve using an external power supply. 1) Disconnect the 4-20 mA control wires from the Current-to-Pressure (I/P) converter or ...
Lab07_La_Juan
... 3. In a parallel RC circuit, the capacitor becomes charged, less current flows through it and more is left over for the resistor. The above equation Q = VC C is a constant. Q is increased so the voltage of the capacitor is increased with time but not over the voltage of the power supply. Besides, Oh ...
... 3. In a parallel RC circuit, the capacitor becomes charged, less current flows through it and more is left over for the resistor. The above equation Q = VC C is a constant. Q is increased so the voltage of the capacitor is increased with time but not over the voltage of the power supply. Besides, Oh ...
Troubleshooting Techniques
... Summary of Transistor Bias Circuits Troubleshooting Transistor You can view the transistor as two diodes connected as shown in the figures below ...
... Summary of Transistor Bias Circuits Troubleshooting Transistor You can view the transistor as two diodes connected as shown in the figures below ...
Buck Boost Converter Seminar.pdf
... the duty cycle of the switching transistor. One possible drawback of this converter is that the switch does not have a terminal at ground; this complicates the driving circuitry. Also, the polarity of the output voltage is opposite the input voltage. Neither drawback is of any consequence if the pow ...
... the duty cycle of the switching transistor. One possible drawback of this converter is that the switch does not have a terminal at ground; this complicates the driving circuitry. Also, the polarity of the output voltage is opposite the input voltage. Neither drawback is of any consequence if the pow ...
Experiment 3 The Wheatstone Bridge
... To measure an unknown resistance with the bridge, connect the unknown in the R3 position. Then adjust the variable resistor (it does not matter which of the other resistors varies) until the galvanometer shows no deflection. Then use equation 6 to calculate the resistor value. In this experiment you ...
... To measure an unknown resistance with the bridge, connect the unknown in the R3 position. Then adjust the variable resistor (it does not matter which of the other resistors varies) until the galvanometer shows no deflection. Then use equation 6 to calculate the resistor value. In this experiment you ...
Amateur Extra Licensing Class
... A. The full scale reading of the voltmeter multiplied by its ohms per volt rating will provide the input impedance of the voltmeter B. When used as a galvanometer, the reading in volts multiplied by the ohms/volt will determine the power drawn by the device under test C. When used as an ohmmeter, th ...
... A. The full scale reading of the voltmeter multiplied by its ohms per volt rating will provide the input impedance of the voltmeter B. When used as a galvanometer, the reading in volts multiplied by the ohms/volt will determine the power drawn by the device under test C. When used as an ohmmeter, th ...
Deney1
... The aim of this experiment is to gain some experience in the use of the digital oscilloscope, DMM and function generators. Try to become comfortable using the oscilloscope DMM and Function generators as it will be used often in this lab, and they are an important instruments in electronics diagnosti ...
... The aim of this experiment is to gain some experience in the use of the digital oscilloscope, DMM and function generators. Try to become comfortable using the oscilloscope DMM and Function generators as it will be used often in this lab, and they are an important instruments in electronics diagnosti ...
Microsoft Word - PHY 204 Exp. 1 Electric Field Mapping
... This very temporary E-field is said to be “induced” by the change in Magnetic Field – it is not the static diverging E-field that is “produced” (or exuded or carried) by charge. Induced Electric field lines form closed loops that curl around the (negative) B-field change in a right-hand sense (ie, w ...
... This very temporary E-field is said to be “induced” by the change in Magnetic Field – it is not the static diverging E-field that is “produced” (or exuded or carried) by charge. Induced Electric field lines form closed loops that curl around the (negative) B-field change in a right-hand sense (ie, w ...
Single and Three Phase Overhead Transformer
... mi.iunted horizontally and located 1 inch above the core clamps. This gap shall he bridge(] initi,3lly by a 0.060sinch diameter or smaller copper wire. [lie gap shall Inc connected between the high-voltage terminals or from one high-voltage terminal to ground. The mounting blocks or terminals of the ...
... mi.iunted horizontally and located 1 inch above the core clamps. This gap shall he bridge(] initi,3lly by a 0.060sinch diameter or smaller copper wire. [lie gap shall Inc connected between the high-voltage terminals or from one high-voltage terminal to ground. The mounting blocks or terminals of the ...
MOD IV
... switches can be BJTs, thyristors, Mosfets, IGBTs etc. The choice of power switch will depend on rating requirements and ease with which the device can be turned on and off. A single-phase inverter will contain two or four power switches arranged in half-bridge or full-bridge topologies. Half-bridges ...
... switches can be BJTs, thyristors, Mosfets, IGBTs etc. The choice of power switch will depend on rating requirements and ease with which the device can be turned on and off. A single-phase inverter will contain two or four power switches arranged in half-bridge or full-bridge topologies. Half-bridges ...
Simple Regulated Supply (SRS)
... sources that are commonly used would be batteries while the main supply would be an other example. But the problem with most power sources is that they are usually “incompatible” with most devices because most if not all power sources output an unregulated voltage that may even be constantly changin ...
... sources that are commonly used would be batteries while the main supply would be an other example. But the problem with most power sources is that they are usually “incompatible” with most devices because most if not all power sources output an unregulated voltage that may even be constantly changin ...
E1UM230V01 AC/DC voltage monitoring in 1
... AC/DC voltage monitoring in 1-phase mains Monitoring relays - ENYA series Multifunction 1 change over contact Width 17.5 mm Installation design ...
... AC/DC voltage monitoring in 1-phase mains Monitoring relays - ENYA series Multifunction 1 change over contact Width 17.5 mm Installation design ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""