Let’s talk about air quality data! Join us for Open Call on this topic every Tuesday until Dec. 14. Click here for details!

Public Lab Research note


NIR Filter Switch Parts

by danbeavers | April 20, 2013 20:43 20 Apr 20:43 | #6939 | #6939

IMG_0034.JPG

Parts

Mathew provided the filter switcher. Both sides of the switch are covered with a protective film that I have not bothered to remove yet. There are 5 separate parts. All of the parts come out after removing the 4 screws (not shown). The X shaped part is metal with internal threads for mounting the filter switch. The other black material is plastic. The solenoid is a split coil with magnet latching. In other words the lever is held at one side or the other by a weak magnet. You can easily change the filter with a hard shake in the appropriate direction.

Filter

Filter Parts I closely inspected the filter holder to determine how the clear (Infra Red pass) filter was attached. There were 4 spots of glue with 2 spots on 2 opposite edges. I placed the glue side down on the paper towel which is over a hard surface and used the side of the forceps to gently press out the clear filter. The removed filter is just visible above its holder.

Questions and next steps

  • What is the resistance of the coil? 19.7 ohm
  • How to mount the visible filter?
  • What to use for the IR pass filter?
  • What are the dimensions of the new filter? 8.1 x 8.0 mm (probably square)
  • How to mount the switch to my PowerShot A800?
  • How to switch the filter? cheap H bridge

0 Comments

Login to comment.