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Thanks for the replies... if we didn't put a PE ground (or is the paracitic capacitor between PCB and PE the probblem?) on the device we will have common mode currents? I am trying to understand what problem will create on the PCB?
Hi,
I have a quiry about how can the two currents can exist as long as have the same direction for instance in Line and Neutral in a power supply (they created from an electromagnetic noise/signal which will add the same noise->voltage->current at both wire L & N)?
A current to flow must have...
Thanks a lot for the replies... Also I saw the below videos where are very helpful.
*** Heatsinks ***
EEVblog #105 - Electronics Thermal Heatsink Design Tutorial
EEVblog #744 - SMD Thermal Heatsink Design - µSupply Part 15
EEVblog #1196 - Custom Heat Sink Design
EEVblog #1347 - SMD...
Hello,
does anyone knows why the Rthjc is smaller than Rthca on a Mosfet? The Rthja I read that is Rthja=Rthjc + Rthca. The Rthjc shouldn't be higher than the Rthca becase the Rthjc is the temprature closer to the junction (the core of the mosfet)?
IRF540N:
Rthja: Junction-to-Ambient - 62...
Hello, I have an ATX power supply and it has a chip with the marking "2003 - BA234980509H". It not work at all.. even the fan not start. I replace al the electrolytic cap and I check all the resistors but nothing and also I replace all the transistors. I suspect that this chip is the problem...
Hello,
does anyone know if there is a difference between an Independent Loop and a Mesh in a circuit and if there is not, which is the better designation to use? Thanks.
Re: Dielectric vs Electrolyte purpose in a capacitor
First of all thanks for the replies.
The dielectric and the electrolyte have the same conductive characteristics? For instance the dielectric and the electrolyte block the flow of electrons and allow the pass of the ions?
Dielectric vs Electrolyte purpose in a capacitor
Hello,
I have confused about what is dielectric and electrolyte. If I understand right, the dielectric blocks the flow of electrons and ions, but the electrolyte allows only the ions pass (and not to the electrons)? So the non electrolitic...
Thanks d123 and betwixt (I have added a resistor and I have changed the mosfet polarity). Is there anyone that has practical experience with mosfet's protection gate, in order to tell me, if it is better with TVS diode or with zener diode and with which characteristics (vbr and response time)...
Hello,
I want to on/off a P-Channel mosfet with car's ignition switch. As I know the voltage of the car when it is engaged is 14Volt and contains voltage spikes mostly of the alternator basically. After a search on the internet i found that a way to protect the gate of the mosfet is to add a TVS...
The one supply is from computer (usb output) and the other is from arduino where arduino is powered from a switching supply 230/12Volt with an internal transformer (magnetic isolation). With these power specifications I will have a short circuit between all powers?
Hi,
I want to design a pcb which will connect with a tablet (slave) either an Arduino PCB (host) and either with a PC (host). At the below image i took a senario where of a trouble shouting all devices will connect together (for instance because all relays are damge). My question is if and the...
Thanks fot the reply, but I have already seen this post "the command you are looking for is called "update free primitives from component pads" on the pcb side. look under >>design >> netlist >> update free primitives from component pads." but this suggested solution doesn't work in my altium.
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