Recent content by tomcorker

Thanks - I see what you mean. I'll have a go when I'm in the lab tomorrow.

As part of a lab report I have to determine the speed of a motor from the PWM waveform. The motor in question is a lego motor, of type at disassembled at http://www.philohome.com/motors/motor.htm. It has three coils on the rotor and a 4 pole permanent magnet stator. This is the waveform I...

I mean the sine wave on the tank circuit is leading or lagging the sine wave supplied to the driver antenna by pi/2. The phase difference was measured with a dual channel oscilloscope.

In a lab session we were investigating the LC tank circuit of a superhet radio. The tank consisted of a ferrite coil antenna connected in parallel with a variable capacitor. A signal generator was connected to a second ferrite antenna (the drive antenna) and placed close to the first in order to...