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Re: PIC microcontroller
The differences are specified by the inner archicture, programming, interfase & periferals.
Try reading any article or book on the subject
The switching speed means the speed at whitch the switching transistor turns off/ on.
It depends on the sw. transistor type, gate (base) driver circuitry, etc.
It doesn't correlate with the PWM frequency.
Usually the higher PWM frequensy you choose means less commutating currents in the...
Re: pole zero analysis
Any book on "Circuits and Systems" would help.
Try searching this forum in books section using this keywords.
Also "Control systems design" or any Automatic Regulation Theory books would do.
1) Try to clean optic lenses & prism from dust.
This needs to disassemble the player.
Be extremely accurate when doing this.
Use very soft material & pure alcohol.
Risk of damaging the optics is very high, so do the cleaning extremely carefully
2) some laser leds have R adjusting the current...
Re: MAKING LOW PASS FILTER
I advise that you try MicroCUP v7 simulator for this purpose.
The program has a build-in analog filter design tool which is very friendly & easy to use. There are also some sample circuits.
The best way to build the circuit is still to use for it any specialised analog SMPS-controller IC like some Unitrode (TI) parts or so.
These IC's have been specially designed for use in SMPS circuits & have all the features needed to effectively control this circuits (regulation, protection...
The simplest way you can get a negative stabilised voltage using only these regulators is if you can obtain a transformer with two (three) separate windings on the secondary. Just don't connect the rectified "-" to the common ground.
Then you'ld get three separate isolated outputs of 15, 15 & 5...
Re: Creating a PCB
You may place the components at the breadboard, any piece of isolating material your imagination can tell.
Another way is to buy FeCl3 at the local shop...
Use search option in the upper right corner, select (specify) "EDA e_books Upload/Download" forum.
Past a proper search string, for instance, "analog design", etc
Enjoy the results...
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