Re-purposing an Air Wick Freshmatic Compact i-Motion

Step 5 Approach 2: Getting it All - Drilling the holes

In this approach, we will:

   1.  Add access to the amplified analog output to the PIR sensor.
   2.  Have external control to a relay driver.
   3.  Have external control to a green LED mounted on the module.
   4.  Bundle all the above into a nice 2x3 connector suitable for 
        easy interfacing to a microcontroller.

Drilling the holes for the additional access points:

   1.  Remove the multi-position switch (SW1) located in the lower right
        corner when the PCB is viewed from the non-copper side. If you
        want to salvage the other switch, remove it also at this time.

   2.  Using a #62 drill bit, drill holes at the locations shown in the secondary
        photo below. There are 11 holes. The spots are marked with yellow dots 
        in the photo. Take special care at the locations marked LED, R, c1
        and c2. These locations do not have a circular pad that we can use.
       When drilling these locations, do not drill into the trace, but rather 
       next to the trace.  

  3.  At LED and R use a dental pick to scrape down to the trace through the
       protective overcoat. This overcoat will re-flow with the heat of the solder gun.
       Try to use the minimum amount of heat possible to make the connections.
       Always be aware of the surface mount components near where you are soldering.
       You need to approach the location so as not to accidentally heat them.