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I found the manual online for what I think you are talking about
**broken link removed**
it has a BOM included so you can at least search for the correct part number.
You could use a bridge rectifier some smoothing capacitors and a voltage regulator. You need a 3V voltage regulator not a 7805. You will need to be careful on thermal management as the bridge and regulator may well get hot when reducing from rectified 9V (nearly 13Vdc) down to 3V dc, rather...
If the components you want are not in the standard libraries you could try looking on the Eagle website for a library download. If that doesn't get you what you want then you could try the Farnell website as they are now providing Eagle parts for some components. If all else fails you could...
MikroElektronika do dev boards and easy to use compilers. AT commands are simply an ASCII protocol for a serial connection to modems and similar equipment, any micro with a serial capability will be able to do it with the right programming.
Datasheets can give very detailed guidance when it comes to getting your design right or tuning the final output but example circuits are the most use to get an idea of how to use a chip. Most datasheets will have some application usage examples but another good starting place is search the web...
My interpretation is that the lock is an input caused by say holding the fan in a locked (stationary) position, then the lock signal either shows high, low or a series of pulses, I would assume the pulses are a response to the fan current pulses as the fan attempts to move the fan against the...
Some chargers work by connecting the load to the battery permanently charging while on load, some have a charger circuit that switches the load power to the main power input while charging and only connects the load to the battery when the main input power is removed.
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