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All the MCU's involved have I2C. What would be ideal to me is a tree-like architecture, where a node is a master to a few others below him, but a slave to a higher node. Is that too hard to implement?
All very sound suggestions that I will try soon! But just for argument's sake, if I were to switch from the 12F683 to the 16F684, with now 6 free pins for communication, what stupidly-simple way of serially communicating it with the 18F would you suggest? I'm looking for simple to implement...
Thank you all for the information! I won't be able to work on the project for the next week, but I will soon post the results and the followup questions.
The 12F683 also has inbuilt EEPROM, doesn't it? I have a bucketful of 12F683's, and I don't want to buy any more MCU's. Also, the 12F have a good size that would fit the small board I intent to build.
Humm... Interesting. After some reading I'm pending towards RS485, it seems simpler to...
Hey there!
I have a master (PIC18F4550) that I want to communicate with several slaves (16F628A and 12F683) in the simplest possible way, I surely don't care for speed or any other luxury, all I want is that it takes as little effort as possible, the project is already too complex and I'm also...
I dismissed the idea after a quick look at pressure sensor prices, it seemed simpler and cheaper to work with the current. Do you think it's a mistake?
As it may already be clear, I'm an absolute ignorant in electronics ;-) so excuse the lame questions, but how do I use an OpAmp with AC? are...
Hum, great! I have little knowledge about sense resistors.
What about aplifying? How could it be done? I've found some circuits but all with a huge impedance, which makes them unsuitable for ADC.
Yeah, thank you, it does help! Now I get it.
How can I amplify AC voltage, it doesn't work like amplifying DC, does it? Will I be able to drop 0.2V without exceeding the 2k impedance limit?
Also, will solo software filtering do, or is there a chance that more complex hardware filtering will be...
The code as it is ( be it C, Pascal...) means nothing to the processor, but when you compile your code, the compiler translates that into a sequence of basic machine instructions, such as those you mentioned, and when you run it those instructions get loaded into memory and executed. This...
Microchip specifies that the impedance on the ADC pin must be lower than 2k, I dont know much about sense resistors, will it be able to generate a non-negletible voltage drop without surpassing that limit? I hate working with low power signals, all that filtering can get really expensive and...
Hum, no, I'm sure of nothing here :smile:
You may be right, I does makes more sense, but either way, the current will change and by measuring it I'll be able to find out if it is running dry.
Edit: And if the current does change at a measurable level, I could also sense if the pipes got...
I have just bought an expensive pump that cannot run dry, but will eventually, so I want to design a microcontrolled circuit to shut off a relay and prevent that.
I believe that when it runs dry, it will spin a few times faster, draining a considerably larger ammount of current. If it were DC I...
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