BITX40 with Raduino - tips and mods
... Was bad ground on regular power and display. Ground on PA PWR was good. OK, I repaired power socket. Relays are functional. I think the PA PWR had a good ground and the regular power and display didn't. The board only had a good ground when PA PWR was connected. Shrill noise on power up !! Solved it ...
... Was bad ground on regular power and display. Ground on PA PWR was good. OK, I repaired power socket. Relays are functional. I think the PA PWR had a good ground and the regular power and display didn't. The board only had a good ground when PA PWR was connected. Shrill noise on power up !! Solved it ...
Medium Voltage Switchgear Condition Assessments
... with the medium voltage switchgear in operation to evaluate the external condition, to measure values of built-in indicators and to identify ageing factors, as well as malfunction of operating mechanisms, secondary system, etc. Actual personal Safety regulations have to be observed strictly during ...
... with the medium voltage switchgear in operation to evaluate the external condition, to measure values of built-in indicators and to identify ageing factors, as well as malfunction of operating mechanisms, secondary system, etc. Actual personal Safety regulations have to be observed strictly during ...
Low Thermal Scanner
... each relay switches the input lines to two different output circuits. Both high and low input lines are switched. This dual arrangement allows difference measurements to be made between voltage devices. True four-terminal measurements can also be made on resistance devices by using two input channel ...
... each relay switches the input lines to two different output circuits. Both high and low input lines are switched. This dual arrangement allows difference measurements to be made between voltage devices. True four-terminal measurements can also be made on resistance devices by using two input channel ...
MA40: ALGEBRA II
... the circuit is 2 6i ohms. Add these complex numbers to find the total impedance in the circuit. 5) The current in one part of a series circuit is 4 i amps. The current in another part of the circuit is 6 4i amps. Add these complex numbers to find the total current in the circuit. ...
... the circuit is 2 6i ohms. Add these complex numbers to find the total impedance in the circuit. 5) The current in one part of a series circuit is 4 i amps. The current in another part of the circuit is 6 4i amps. Add these complex numbers to find the total current in the circuit. ...
Franco’s Finest: MGA62563 ultra low noise amplifier 1.0
... Figs 1 and 2 there is the broadband and expanded low frequency band graph in order to show it at lower frequencies, the noise figure remains lower than 1dB up to 2GHz (typically 0.9dB) and 1.1dB @ 2.5GHz. The associated gain is appropriate for applications from 30MHz to 2.6GHz, see table 1. This is ...
... Figs 1 and 2 there is the broadband and expanded low frequency band graph in order to show it at lower frequencies, the noise figure remains lower than 1dB up to 2GHz (typically 0.9dB) and 1.1dB @ 2.5GHz. The associated gain is appropriate for applications from 30MHz to 2.6GHz, see table 1. This is ...
Power Electronic Devices - University of Washington
... • During the conduction period, the voltage drop across the solid-state device is about one volt. This voltage drop multiplied by the current inside the device produces losses. • When the device is in the blocking mode (open), a small amount of leakage current flows inside the device which also prod ...
... • During the conduction period, the voltage drop across the solid-state device is about one volt. This voltage drop multiplied by the current inside the device produces losses. • When the device is in the blocking mode (open), a small amount of leakage current flows inside the device which also prod ...
Transfer Function - Dr. Mohammed Hawa
... resonant circuits. The one shown below is a two-stage filter consisting of a LPF stage that follows a HPF stage. ...
... resonant circuits. The one shown below is a two-stage filter consisting of a LPF stage that follows a HPF stage. ...
Wireless Starting Of 3 Phase Induction Motor
... conduct current only in one direction), TRIACs are bidirectional and so current can flow through them in either direction. Another difference from SCRs is that TRIACs can be triggered by either a positive or a negative current applied to its gate electrode, whereas SCRs can be triggered only by curr ...
... conduct current only in one direction), TRIACs are bidirectional and so current can flow through them in either direction. Another difference from SCRs is that TRIACs can be triggered by either a positive or a negative current applied to its gate electrode, whereas SCRs can be triggered only by curr ...
LECT7V23
... In other words, the "low" output voltage is at least this low. VIL = VIn Low Max = the maximum voltage that is unambiguously recognized as being a "low" voltage, at the input. In other words, any voltage that is at least this low, will act as a "low" voltage at the input. The values for VOH, VOL, VI ...
... In other words, the "low" output voltage is at least this low. VIL = VIn Low Max = the maximum voltage that is unambiguously recognized as being a "low" voltage, at the input. In other words, any voltage that is at least this low, will act as a "low" voltage at the input. The values for VOH, VOL, VI ...
Mobile Card Studio Physics Activity – n
... well.) We will use the diode to control the current flow through the device and the resistor to monitor the current. 2. Start the Mobile Card and set up the FG1 to create a 2V peak to peak triangle wave. Use FG1 to drive the resistor and diode in series by wiring the ground side of FG1 to the white ...
... well.) We will use the diode to control the current flow through the device and the resistor to monitor the current. 2. Start the Mobile Card and set up the FG1 to create a 2V peak to peak triangle wave. Use FG1 to drive the resistor and diode in series by wiring the ground side of FG1 to the white ...
Frequency response of feedback amplifiers
... supply to AC signals power spontaneously – without the need for an AC input source (Note: Amplifiers convert DC power into AC output power only if an external AC input signal is present.) • There are several approaches to design of oscillator circuits. The approach to be discussed is related to the ...
... supply to AC signals power spontaneously – without the need for an AC input source (Note: Amplifiers convert DC power into AC output power only if an external AC input signal is present.) • There are several approaches to design of oscillator circuits. The approach to be discussed is related to the ...
Infra-Red Switch
... For example, if we choose C = 1·5nF and R2 = 10k this gives R1 = (about) 5k for a frequency of 40kHz. We should therefore use a 10k variable resistor for R1. This will allow us to set the frequency to exactly 40kHz. For stability of frequency, a voltage regulator is recommended (the vero diagram bel ...
... For example, if we choose C = 1·5nF and R2 = 10k this gives R1 = (about) 5k for a frequency of 40kHz. We should therefore use a 10k variable resistor for R1. This will allow us to set the frequency to exactly 40kHz. For stability of frequency, a voltage regulator is recommended (the vero diagram bel ...
COMBOLIGHT New Construction Recessed w/ Trim - 12V AR70 - 1 Light
... opening and to help conceal the inner hardware of the fixture from sight below the ceiling. Can accommodate 0.50" (13mm) to 1.25" (32mm) ceiling thickness. Optional Chicago Plenum configuration available. ...
... opening and to help conceal the inner hardware of the fixture from sight below the ceiling. Can accommodate 0.50" (13mm) to 1.25" (32mm) ceiling thickness. Optional Chicago Plenum configuration available. ...
THE LIGHT BULB EXPERIMENT: Exploring Simple Electric Circuits
... THE LIGHT BULB EXPERIMENT: Exploring Simple Electric Circuits Preparatory Questions for Review: (also read this guide sheet, which contains some of the answers!) 1. State Ohm’s Law, defining every term in the equation. 2. If a bulb connected directly to a 6 V battery glows brightly when 1 A of curre ...
... THE LIGHT BULB EXPERIMENT: Exploring Simple Electric Circuits Preparatory Questions for Review: (also read this guide sheet, which contains some of the answers!) 1. State Ohm’s Law, defining every term in the equation. 2. If a bulb connected directly to a 6 V battery glows brightly when 1 A of curre ...
Supplemental Information (README file) The "Switchers Made
... applications. It introduces a zero in the regulator's control loop. To maintain good phase margin, the ESR has to be smaller than a limit value in boost and flyback converters and has to be between a high and a low limit in buck and buck-boost regulators. The program outputs these limits in the "Li ...
... applications. It introduces a zero in the regulator's control loop. To maintain good phase margin, the ESR has to be smaller than a limit value in boost and flyback converters and has to be between a high and a low limit in buck and buck-boost regulators. The program outputs these limits in the "Li ...
Circuits
... (iii) It can be proved that when the resistance of the rheostat equals the internal resistance of the cell, maximum power output from the cell would be obtained. Find an expression of this maximum power output in terms of E and r, and calculate the corresponding output efficiency of the cell. ...
... (iii) It can be proved that when the resistance of the rheostat equals the internal resistance of the cell, maximum power output from the cell would be obtained. Find an expression of this maximum power output in terms of E and r, and calculate the corresponding output efficiency of the cell. ...
ICL8038
... The frequency of the waveform generator is a direct function of the DC voltage at Terminal 8 (measured from V+). By altering this voltage, frequency modulation is performed. For small deviations (e.g. ±10%) the modulating signal can be applied directly to pin 8, merely providing DC decoupling with a ...
... The frequency of the waveform generator is a direct function of the DC voltage at Terminal 8 (measured from V+). By altering this voltage, frequency modulation is performed. For small deviations (e.g. ±10%) the modulating signal can be applied directly to pin 8, merely providing DC decoupling with a ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.