I im really a noob at this, but i like a challenge
I want to make a mill and later a FoamCutter. (Im a RC-plane builder/crasher)
Well ive been looking around for about 6month now and i can't figure this out.
Well now for the part i dont understand.. THE REST. Does anyone have any schematics for using these kind of drivers?
Maybe just explainging the leggs on the LB1845 would help me too. i see no dir-pin etc.
please someone help and please excuse my english. Im a swede
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I looked at the block diagram and there is no counter in it, so no puls/direction. You also have to define the PWM frequency. You can approach this problem in three way's:
1) with a 4510 (presettable up/down counter), make a table which logic combination should activate which coil, and feed this through a Eprom or hard wired logic, which contains the steps.
2) Make it in programmable logic, it probably will fit in a GAL. It is a little harder to master, it is the same as above, but in 1 package.
3) program it in an TinyAVR. Along the way you learn to program the new cockroach of microprocessors, also 1 package, but with active Internet support. The crazy thing is that these processors cost (for me) Euro 1.37, which for me would exclude choice 1 and 2, because they are more expensive.