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thanks for your replies. FvM, when you say that
what do you mean? I'm trying to find the attenuation of the field outside the coils, so the only losses are as a result of the core, or not?
I have already solved this problem with FE analysis, and as you say the field lines look like those for...
well biot savarts is only for the magnetostatic case. I'm looking to see how it would work for a time varying current. Maybe ham radio ppl and antenna experts would be able to explain this, if there are any on this forum.
thanks, but i'm more interested to know if the field outside of the solenoid coils can be explained analytically. The closest example i can think of would be a loop of current and using biot savart law to find the attenuation (see image). This only applies to the magnetostatic case and a single...
so a solenoid is hooked up to an ac signal. The solenoid core (say ferrite) is much longer than the solenoid coils. How does the magnetic field outside the coils, along the axis of the core look like. Can the attenuation of the magnetic field be explained analytically?
From intuition the...
hello
I'm trying to get a few photo transistors to control two DC motors. I'm using ADC. Without the motors running I'm able to obtain decent values for ADC, however when the motors are running the ADC reads all kinds of nonsense and the motors go crazy. What is the best way to reduce this...
General rule of thumb is that it takes 5 time constants ( so 5*RC) to discharge/charge a capacitor. Remember that the voltage across a capacitor does not change instantaneously,but the current does. So the maximum current is at the start and is simply V/R
Hi.
Thanks for all the replies. I took a look at the Rigol DS1052E and it does look like a decent scope, would be slightly more expensive than the used tektronix though. The problem with buying used things is that they are never like you expect them to be and there is always a risk involved, so...
Hello,
I'm looking to buy my first oscilloscope for general use ( 2 channel , 10-100MHz Bandwith, >100MS/s sampling rate, <400$).
Dilemma:
I have found that I can buy a used but fully functional Tektronix TDS 340 or a brand new **broken link removed** for about the same price. Which would you...
So I'm assuming my code is messed up when it comes to receiving data from the host. I tried plugging the microcontroller to another computer and nothing. There is something wrong with the communication.
I took apart an old PS2 keyboard and found the microchip which has the behaviour I'm trying...
Hi srizbf, thanks for the reply.
If I understand this correctly then you are saying that I must know the status of the shift key in order to control lower and upper case. Where is the shift status stored and how can I control it?
Hello.
I'm programming a microcontroller so that it can use the PS/2 protocol to communicate with my computer. So far I have managed to program it so that it sends make codes for characters which are then correctly printed on my computer display, it uses the typematic delay and typematic rate...
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