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orcad tca785
Orcad uses PSpice, so that eliminates one possibility. I'd use PSpice rather than Matlab if you want to take into account the model of the real device you want to use.
You may want to take a look at PSim, it's optimized for Power Electronics.
Maybe you'll find the model for this...
Re: DC-DC Convertor
It all depends on the topology you use. You have to figure out which input voltage will produce the higher stress on the components.
In some topologies you'll have to design some parameters with the lowest input voltage and some others with the highest.
Re: rectifier
Hi,
I don't have the exact circuit right here, but you can google "transformerless power supply". You'll find circuits that produce low voltages directly from the mains with the help of a couple of diodes and a few passives.
cyberblak
16x16 multiplier
Hi,
I need to find an 8-bit microcontroller that has an external bus with a lot of addressable space.
I need several Mb of RAM and FLASH memory.
Any ideas?
cyberblak
No need to tell you that you should make sure of that.
Never worked with those products in particular, but I know about some RF transceivers that operates badly when they are too close. You should make sure that you use an adequate antenna and test the modules at a reasonable distance (say 10...
Hi Alameer,
Here are a couple of things to check out:
- Do you use two modules with the same operating frequency (ex. 433MHz)?
- Do you use the same bit rate (9600 bps for the D version of the DPC-64-RS232)?
- Did you connect an antenna of the proper length, very close to the pins 21 and 22...
Hi Alameer,
I think that the first thing you'll have to learn in you career in engineering is how to describe things properly.
You don't get any answers because your description isn't precise enough. Moreover, describing your problem more precisely will probably help you to understand it...
Re: Protecting ADC inputs
The current that comes from the protection diode substracts from the output current of the voltage regulator.
No need to have a regulator that supports reverse currents.
Re: Data acqusition card
They are not the cheapest on the market, but the DAQ cards from NI (www.ni.com) are very robust and easy to use.
I know that they offer a low-cost USB card.
Hi,
A 100nF for each power pin of each IC is a commonly accepted value. For more serious applications, you can also parallel multiple capacitors based on their resonant frequency.
cyberblak
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