Magnetometer M1

Signal conditioner printed circuit board; the SLC-006B ASIC and AD557 DAC are clearly visible.


Signal conditioner module with everything mounted in a plastic case.  On the left are the power switch, power
ON indicator LED and coaxial dc power jack.  On the right are the mini-DIN connector for the sensor and a
3.5 mm phone jack for connection to the data logger.  The controls on the lower side of the module are the center
scale reset switch (left) and 4-position sensitivity control rotary switch (right).


FGM-3 magnetometer sensor mounted of perforated board for testing.  The electrolytic capacitor provides
noise filtering at the dc power input lead of the sensor.  The mini-DIN connector connects to the signal conditioner