Hi Everyone,

I've found a toroidal current sense pcb-mounted device for a little over
one UK pound. Excellent. It says it's suitable for 50Hz AC voltage and
1A to 10A. It's basically a rectangle with a hole in the middle for the
current-carrying cable, and two pins underneath it for the output.

The datasheet states that there is 50 ohms resistance between the two
pins and the graph implies that I should see 4mV to 5mV for 1A and 7.5mv
for 2A.

That means I should be able to detect what kind of bulb is in the light
too, right? Cool. The two possible bulbs are 250W and 500W, and I live
in the UK, so it's 230vAC.

I've never used the A/D port on a pic before, but I've got a 16f628
earmarked for this, which has one I believe.

How does one connect up this current-sensing coil to a pic a/d pin then?
I'm assuming something nice and simple like I ground one end of the coil
and just wire the other directly into the a/d port, then it's all
software?

Or would that not yield any input?

Cheers,

Tim.

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