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It is usual that rated power of equipment (diesel generator set, UPS, transformer) should be derated above 2000m above sea level because it is much harder to cool it.
rs232 galvanic isolation
Hi!
I am building pcb with RS-232 (Maxim Max232) and USB 2.0 (FTDI FT232) implemented.
Is it needed to make galvanic isolation for both communications with PC?
How can I make it if answer is yes? Please suggest some techniques. If I use notebook
do I need galavanic...
power and calculation
Hi!
How can I determine total current consumption of an MCU-DSP etc?
I have read from datasheets for dsPIC (30MIPS, 16xPLL, 5V, 25degC, PDIP40) that its Idd is 132mA at that conditions and that its maximum consumption current on all ports (from absolute maximum ratings) is...
Hi!
I am designing digital AC motor controller with dsPIC.
I have two crystals (2pin, HC49) in my pcb file: one for dsPIC (14.7x MHz), and other is for USB chip (6MHz). One is in horisontal and other is in vertical axis.
What is reccomended minimum distance between them?
Now, I have distance...
Hi!
How can I update information between sch and pcb file.
I have next situation:
After I had finished sch I generated netlist and imported it into pcad pcb. When started manual routing I saw several mistakes within my part's pads&connections.
I need to change some part's pins definitions...
Hi!
I need to measure three phase AC voltages (~230VAC, 50Hz) in order to
control AC motor. I have to use resistor divider plus some OpAmp and RC filter
in order to scale and isolate that voltages which will be connected at input of an ADC
(in dsPIC controller).
How should I connect resistors...
Re: Avg Signal Power
I saw that you samples were not from e.g. sinusoidal signal but from some aperodic which is always positive. I did not count with signal theory but on common sense because I am an electric power engineer. Maybe I am wrong. If you knew that signal power cannot be zero why...
Please, explain to me what kind of oscillator is it and where one can use it.
In Microchip's DSC controllers dsPIC family exists Fast internal oscillator which can be firmware tuned in steps of 1.5% from -12,5% till +10% of base frequency 7.5MHz by writing appropriate values into some register...
You can try to search TI site www.ti.com to find some usefull guides for motor control and there you may find some tables for MIPS requirements for many tasks: ADC, filter, PWM and you will be able to estimate your MIPS required.
I think that it must be <= 10MIPS; if it would be greater you...
Re: Best and simple launguage for serial ,parrellel and USB
I will have to use Visual basic 6 for RS232 and USB2.0 control.
RS232 is not complicated and you can find useful things on the web and some books at this forum. USB implementation is done using, eg. FTDI chip FT245BM which has windows...
ic case style
TQFP stands for thin quad flat pack and it is a SMD kind of component.
When you see it in suitable datasheet everything will be clear to you. Not reccomended for newbies or when prototyping in analog/digital design because when you are developing some embedded system it may...
Re: requiring guidance
First you will have to study PIC's datasheet and PIC family reference manual.
Then, search application notes, webseminars and design guides sections to find suitable documents. Microchip has the best structured documentation and huge collection. You have to study ADC...
Re: Digital Filters and Convolution in dsPIC or any uControl
Look at Microchip application notes section. There are examples for IIR and FIR filters (I've forgtot wheter theay are for C or assembly).
Good example in C is TI's introduction to oversamplig theory...
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