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Hi bizoo,
the easiest and absolutly correct way is to measure the current which flows into your processor, then multiply everything with the operating voltage of your processor, and thats it. (Ok, don't think of leackage current trhough pins, periphales which are enabled inside your processor...
Re: Wire less Modem
Hi,
you can find a complete design including theory, schematics and program at the page www.chipcon.com under application notes for CC1100 and CC1000.
Regards...
Re: about RFID
Mifar is using 13.56MHz as transmit frequency and the data's are encrypted.
If you have your NDA with Phillips then you should be able to decrypt the datas according the manuals, because Phillips gives you passcodes for their secured pdf with application notes and reference...
I expect that you have a appropriate line filter build in.
The crystal for the 32kHz should be as close as possible to the IC pins and the body should be connected to GND (if it is a T/H crystal). A GND area round about the DS1337 is also not a bad idea.
Regards...
Re: 3-phase voltage
Easy way...
Write a lookup table in memory and use a pointer, the lookup table contains the precalculated values for a sine wave, as example 256 values for a 8bit DAC (128 values are also working...).
For each phase you want to create use a seperate pointer on the lookup...
Re: Interrupt timing
Hi,
I thought that the f_Osc is divided by 4 and then fed into the pic-core. This will mean that your program runs with 1MHz, if you set the prescaler to 2 you will have 500kHz frequency for you timer...
Regards...
Re: about RFID
normally you can use reader and tags from different vendors.
Just some things to keep in mind:
- operating frequency
- data rate
- encryption
Regards...
Re: wireless security system
I would suggest the Chipcon CC1100 Transceiver, it is very flexible in the Range of 300-1000MHz digital receiver parts, different modulation types, FIFOs and and and
Just visit www.chipcon.com
Regards...
The LDO wont work as constant current source normally. That means if your circuit consumes 40mA the LDO will give out only 40mA.
For resources regaring LDO and standard linear voltage regulators, visit www.national.com they have a great pdf with all the basics.
Common LDOs (at least for me) are...
profibus datalink
Hi,
we tried also the VPC3, but the behavior was different to the SPC3 so this chip wasn't accepted as second source for our project.
Regards...
dspic profibus
Hi asena,
the firmware is in C and was compiled with 8051 Keil Compiler...
But the firmware itself is licensed, a part you can buy from Siemens / Infineon
Regards...
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