SHOWALL FUN PRANKS HIGH VOLTAGE LAZARUS-64 PHOTOGRAPHY SPY GADGETS VIDEO GAME
Figure 4 - Sometimes the term hacking must be taken literally!
Figure 4 - Sometimes the term hacking must be taken literally!

To open these motion sensor boxes, you will need some brute force and ugly hacking since they are glued tight to keep out water and never intended for repair or modification. Of course, that will not stop the determined Evil Genius with a knife in hand! The easiest way to split open the plastic box is to run a sharp knife along the seal as shown in Figure 4, breaking the glue so that the parts can be pried apart. Once you have one side free, you can insert a thin screwdriver blade and split the two halves apart. Try to avoid damaging the half with the lens as you will be using it again later.



Figure 5 - The two halves open up to reveal the circuit board inside
Figure 5 - The two halves open up to reveal the circuit board inside

Once you have the front part of the motion sensor casing open, you will be able to get at the circuit board inside. You can see the Fresnel lens in Figure 5, glued to the front half of the plastic casing. When you are done hacking the sensor, the goal will be to have the lens placed back in the same spot ahead of the sensor that it was originally in order to keep the field of view the same. Usually, you can glue the plastic cabinet back together or just fasten the front half over the circuit board or onto another project box that holds both parts together.

Back Home Last Next
You are Viewing... Page 3 of 10
Lucid Science Electronics from the Fringe AtomicZombie Hack-a-day SparkFun