Mount and Secure Components
Now that we have a platform, we can build and install our components.
1.) This relatively simple circuit and solenoid pair can be built according to the diagram below. Note that the SS495 gets mounted to the bottom of the coil. Adding an LED allows you to verify power and a digital voltmeter allows you to detect a load for tuning purposes, both optional, they can be wired directly to the circuits 12v input with an in-line 10k resistor on the hot lead (+).
2.) Wire the jack to the circuit's input, noting the circuit diagram and remember that the jack's case is the ground (-).
3.) Connect outputs 1 and 2 from the LMD18201 IC to the solenoid coil. Insert a steel bolt into the coil's center and to the head of the bolt mount the SS495 A Hall Effect Sensor to which will be connected to the leads according to the diagram.
(It may be helpful at this point to secure everything temporarily, carefully connect power and test the solenoid's field with your magnet).
4.) Once satisfied, secure the components to the platform. The circuit should be upright to allow airflow and near the jack, the solenoid should have the side with the sensor facing down and the optional LED and LCD can be placed wherever is convenient. Adding some shrink wrap and wire covers at this point makes everything neat and helps avoid short circuits and tugged wires.
5.) To further secure and cover everything add the final plexiglass sheet. First add a nut and washer to each rod, then the last plexiglass sheet and adjust it down so that the top sheet makes contact with your solenoid, tightly holding it in place. Once in place and level, add four more washers and nuts and cap with your rubber end caps.