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Re: About Virtual ground
I'm not an Op Amp specialist, but I think the term "virtual ground" only has significance, when your refer to the potential of one of the inputs when the other is connected to the ground.
Anyway, if you consider the high input impedance of the Op Amp, there is always...
Re: regarding SPI????
Hi viswanath,
You can definitely do it. I have implemented a couple SPI ASM routines, that are specific for my application, for a 8051 based design.
Although it is possible, it is not straight forward, since you have to consider how the SPI device you are communicating...
Re: Project tips
This are a couple good ideas, in my humble opinion:
https://hackaday.com/2008/10/30/how-to-usb-remote-control-receiver/#more-5239
**broken link removed**
amol_shah is right, It depends on the crystal and the uC you're using.
For example, in most 8051 based uC's, a machine cycle takes 12 clocks cycles, so with a 11.0592 MHz crystal (kind of a standard value when serial communications is held), you have 11.0592 MHz / 12 = 921600 machine cycles per...
Re: need logic level shifter
Another application report that is worth looking at is:
https://www.ti.com/litv/pdf/slaa148
I've also used an IC circuit that can be used to convert from any input between 2V to 18V to any output from 2V to 18V. The only inconvenience is that you must have two...
I think this is highly dependent on your C compiler. Usually, when I need to interface C and assembly, I write the function prototype in C, then I compile the C source file, instructing the compiler to generate the (dis)assembly list.
Then, you have to open this list file to see how the...
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