The motors that I have bought for my quadcopter are 2212 1000kv motors and they can be connected to 2 or 3 cell li-on polymer batteries. To be able to control them I needed an esc which I purchased from China , a 10 amps seems to be enough for me .
I bought first one piece, although I need four of them to get the whole quadcopter into the air . The reason that I bought one first is that I first wanted to try out if the esc is really working and if it is not overheating like other stuff I bought from Aliexpress 
My first try with the esc was to get it working with pwm , after changing the frequency a couple of times I managed to let the esc beep 2 times but after that nothing happened and I got stuck . Than I read somewhere on a forum that the esc needs to have a pulse of 1 millisecond to start with , with a low of 20ms in between the pulse and after this you can change the pulse from 1.0 till 2.0 ms to let the motor go faster or slower , after I changed this the motor went to fullspeed and yes it is faster/louder as you think .Also slowing down the motor worked.
The lpc11u14 c-code to reach this :
void SetServoSpeed(float delay)
{
//Set High
GPIOSetBitValue(0,22,1);
delay32Ms(1,delay);
//Set Low
GPIOSetBitValue(0,22,0);
//delay32Ms(1,20-delay);
//Set High
//GPIOSetBitValue(0,22,1);
}
void SetStart(void)
{
//Set High
GPIOSetBitValue(0,22,0);
delay32Ms(1,1.0);
//Set Low
GPIOSetBitValue(0,22,1);
delay32Ms(1,1.0);
//Set High
//GPIOSetBitValue(0,22,1);
}
if(i<300)
{
SetServoSpeed(1.9);
delay32Ms(1,10.0);
}
I still think it should be possible to control the esc with pwm and I will try this later on but 
now on a much lower speed 40-50hz , the reason that I prefer this is that from a timing point of view this is much better and it doesn’t need code in the main loop.
I will run one test more with PWM and after that I will start working on the barometer (BMP085) and the PCB. The idea to make an own esc seems for the moment too much work but maybe it is a project for a bit later in the year .
I am also thinking about a new name for my quadcopter ….
amplitude can be set from the spartan menu .
