Ultrafast rectifier diode: how can I calculate the maximum frequency?
I built ESC that had a 1N4007 as flyback diode. It was destroyed because my ESC was working with high PWM frequency. I replaced the 1N4007 with BYV29 ultrafast rectifier diode.The result was good this...
View ArticleDetermine adequate speed of flyback diode for a relay
I have already looked at this question which looked like it would provide the answer:How to choose a flyback diode for a relay?But it didn't, so I also checked out...
View Articleidentify these parts please 116R1 - in sot23-3 package 115Z1 - in sot23-3...
help identify these parts116R1 - in sot23-3 package115Z1 - in sot23-3 packagehave tried to identify but unsuccessful
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Help in identifying an abnormal PCB found suspiciously [closed]
This is an odd PCB I found a while ago on the bedroom floor of my apartment next to my bed where my dongle for extra USB-3 ports was hanging off the bed. I have no relationship to this board, it's not...
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Find DC current through the diodes
I am trying to perform the DC analysis of the following circuit:Since we are performing the DC analysis, the ac voltage sources will be grounded. I have drawn the schematic when AC source is grounded....
View ArticleCool White LED bulbs: Are they "full-spectrum"?
I don't have much knowledge on LED lights and find the technology quite fascinating (yes, I know, it is not that new!)I have read that in order to create "white" light, LEDs actually need to emit light...
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Testing a hockey puck SCR
I have a hockey puck SCR in my circuit which I suspect might be faulty. The reason I suspect the SCR is that while my system is charging up it discharges prematurely and arcs.I tested it with a...
View ArticleIs connecting a diode in series with a resistive load safe for a Solar inverter?
I have 1100Â watt pressing iron which I want to run on my 1000Â watt solar inverter which is pure sinewave. For this I want to try to connect a 10Â amp diode in series with pressing iron to get the iron...
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Select power source with reverse current
I'm designing a Split keyboard where each half can be connected to USB, or to the other half, or both. If one half is not connected to USB, it receives its power from the other half. 99% of the time...
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How can I make simple AM modulator?
I've been trying to get to make this simple am diode modulator work, but it seems like when I give the modulator RF signal from simple crystal generator and audio, it works a bit but the modulation is...
View ArticleDiode-Connected load
What does it mean by a small-signal resistor? What is meant by Diode-Connected load in MOSFET? Does it mean that MOSFET act like a diode connected with a load? Then why it is called as small signal...
View ArticleDiode heating of junctions
When a PN diode junction forward conducts heat is generated due to the product of forward volts and current.Is the heating evenly distributed between the P and N junctions? or is it the P? or is it the...
View ArticlePower loss calculation question
Recently I am working on power loss calculation, there are two components I need to calculate, the MOSFET and Diode, and I have some questions I would like to ask you.What's the most accurate...
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De Lorenzo Diagram Specification
I need specific components for this De Lorenzo Diagram, I have to simulate it using Multisim.
View ArticleSeries diode to reduce charging voltage, BUT with a twist
I have been agonising over this question for a number of days, and I cannot come up with a simple answer.I have some (nominal) 48 V, 15 kW (16S) battery packs that obviously need charging. I purchased...
View ArticleDifference between \$r_d\$ and \$r_D\$ in diodes?
I'd like to know what's the difference between \$r_d\$ and \$r_D\$ when regarding diodes.I know that \$r_d\$ means dynamic resistance, but I'm not sure what \$r_D\$ means, and how it differs from the...
View ArticleV built in vs v cut in
What is the difference between V built in and V gamma in a pn junction diode?I have problem in differentiating?
View ArticleWhat factors contribute to LED degradation over time?
As I understand it, LEDs can break down in two main ways: excessive current, which can cause the LED to blow on start-up, and high temperatures, which can burn out the LED. But what about long-term...
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Trying to understand how they got equation for Vzo
this might seem like an easy question but I'm still new to circuits and I'm trying to understand how they got the equation for voltage.They have the solution as 6.8=Vzo+5m(20), but when I looked at it...
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