The Body Detector is built into a plastic case with slotted walls, size 158mm x 95mm x 54mm approx. Holes are prepared on top of the case for VR1, S1, L.E.D D1, and the sensor bolt. Two small holes are also carefully positioned on top of the case to expose multi-turn presets VR2 and VR3, so that these may easily be adjusted from outside the case.
It is suggested that the holes for the presets be clearly labelled, so that their purpose is not forgotten with the passing of time. The author has more than once returned to a past project, only to puzzle over what the various adjustments might once have been for. Power socket SK1 and jack socket SK2 are mounted on the back of the case. Drill a hole for the insertion of a thermometer.
The test bolts and piezo disc WD1 are mounted on the case. The piezo disc may be mounted behind a small hole on the front wall of the case. Board B is slotted into the case with the multiturn cermet presets VR2 and VR3 face downwards. Cable ties may be used to tidy up the connecting wires. Make sure that the battery is secure since a change in its position inside the case could slightly affect the unit's calibration.
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