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Hi,
I'm looking for a barcode scan module, to provide decoded barcode data via some serial protocol maybe SPI, etc., and it needs to just work with 2D barcodes (one of the alphanumeric ones, I forget the code but it is one of the popular families - it may be code 128).
I know normally they...
He'll be lucky to get 100-200mW without triggering off-hook. He could get a solar panel for a one-off cost of 20-30 dollars with 10 times that output.
The solar panel would reduce the need to use the electricity company's power lines for lighting LEDs, plus it would save the telephone
company's...
As a doctor, you should know the importance of capitalization (or the lack of it), for example,
if you're a doctor of medicine you may know that 10mg of medicine means 10 milli-grams. Presume you
meant 10 Mega-Hertz, and not 10 milli-Hertz?
If you know it's frequency is 10mHz or MHz, then what...
OVT have loads of cameras, you'd probably want a low-res one if you're planning to read the camera output directly into the microcontroller.
You need to allocate a fair amount of memory for storing the image. It's a lot of data to stream over the network though, even with a small camera. So you...
Assembler listings don't show how machine instructions ('ret' in this case) work.
You could look at the Instruction set reference manual for the processor that you are using
(you didn't mention it), to learn what 'ret' does.
If you're curious to see the behavior at this low level (which most...
If you're not using Linux, then it's going to be hard for 2 reasons.
1. The lack of existing driver that you've mentioned above, which was the subject of a similar post by someone else just a few days ago
2. The compression issue - with Linux, at least you could use some open source for this. If...
Or, you could just check the time, and assume there is daylight during certain hours.
I suspect that wasn't what you wanted though!
Or, a video camera and some smart intelligent software to interpret the image.
NASA technical reports is often a good resource for technology like this. I searched for Ni-Cd and Nickel Cadmium,
and found lots of hits.
The nice thing about Ni-Cd is that it has been around for so long, so that surely lots of information is available on this.
Of course, your cells may be very...
Well, you didn't answer the question clearly, so I'll take a guess and assume you're actually looking to make a 5V power supply with a USB connector,
that can be plugged into smartphones to charge the built-in battery.
In that case, you just need a 5V supply with the capability of supplying 1...
See here for information on a Linux driver for a webcam.
You could try porting the Linux driver, but it may be an uphill struggle, since the Linux driver uses
different APIs.
For that reason I don't think it will be straightforward; there may be a lot of work involved. You'd need to
examine the...
What is a USB charger?
A charger that runs from a USB supply, to charge a (say) Li-Ion cell?
A "charger" that does not run from a USB supply, but supplies 5V? In which case it is a 5V supply, not a charger..
Sounds like you got the much tougher project. Your lecturer must really like you. You need to find ways to detect the load on the motor
(e.g. speed?) and then develop your algorithm..
You will need analog and control skills, not just microcontroller knowledge. It has industrial use - one...
I don't have Proteus so unless you attach a jpg image, I cannot tell what was designed.
In any case, any simple home-built stepper motor driver will exhibit jerky behavior because that's what stepper motors do, unless you
can implement microstepping (which is complex, which is why a dedicated...
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