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UFO Detector

Considerations for UFO-01 Detector Kit Construction

To build the UFO Detector kit, you will need to identify, mount and solder electrical components onto a printed circuit board. And assemble a couple of plastic components together.

   If the construction sounds like too much work for you or you don't think you can do it properly, you can buy the kit assembled and tested. If you are up to building this kit, then let's continue.

Circuit Construction

The UFO Detector schematic (electrical drawing) is shown in figure 3. The printed circuit board (PCB) used in this project eliminates wiring the components together and you simply mount and solder the components on to the pcb. While the PCBs simplifies construction, there is nothing critical about the circuit and you may purchase the parts separately and construct the circuit on a prototyping breadboard if you like.
Figure 3

   The topside of the pcb board has white silkscreen depicting the parts placement, see figure 4. Mount the components to the topside of the board. Solder the components from the bottom side of the board and clip away any excess wire.
Figure 4

The Q1 voltage regulator position on the pcb was made for a standard T0220 7805 5V regulator. For the UFO detector we use a LM2936Z-5 Low Quiescent 5V regulator. This component is in a T092 package, so just spread the leads a little bit to fit them into the T0220 position. When mounting this component, the flat side of the LM2936Z faces the edge of the pcb.

Mount and solder the 3" of 22 ga. Stranded red wire to the (+) pcb hole marked Vin. Solder the 3" of black 22 ga. stranded wire to the (-) lead on Vin. These are the power wires that will connect to the 9V battery holder.

Mount and solder the 22 uF capacitors C3 and C4, making sure to orientate the positive terminal of the capacitor to the (+) hole on the pcb.

The sensor is mounted to the two white concentric circles labeled 1490 silk screened on the pcb. It doesn't matter which way the compass if facing when you place it on the pc board. Take your time lining up the twelve leads on the 1490 compass to the twelve holes on the pc board. When you have the twelve leads through all the holes, make sure the compass is level before soldering the leads.

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