HobbyKing.com New Products Flash Sale
Reply
Thread Tools
This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Old Nov 12, 2012, 09:19 PM
Registered User
Jack Crossfire's Avatar
Calif*
Joined Sep 2006
2,141 Posts
Discussion
IR conversion failure

After the Blade MQX & Syma X1 micro quads having nothing but gyros, it was surprising again to find the Ladybird had accelerometer. A freescale MMA8452, to be exact. It doesn't do a very good job remembering what level is, but it dampens its own motion. It's further evidence of the propeller inertia being related to the self leveling.


The mane event was the planned conversion of the TCM8230 to IR. Unlike the webcam conversions described on Google, its IR filter is integrated with the sensor & turned out to be aggressively glued in place.

Using an xacto knife to pry off 1 filter ended up crushing the filter & scratching the sensor. That bridged the power rails & it burned out after powering up.

Heating a 2nd sensor with hot air while prying off its filter with a T pin ended up scratching the sensor again. It requires too much force to pry off.


With $20 of an end of life camera destroyed, conversion of the TCM8230 to IR was busted. IR video definitely requires a webcam with a large filter attached to the lens instead of a tiny filter attached to the sensor. That rules out manual exposure, synchronizing a flashing LED with each frame, or processing the video on a microcontroller.

Since all the image processing was heading towards a rasberry pi, there was less incentive to bother with a board cam. The wifi glitches meant all processing had to be done on a rasberry pi instead of a tablet.

The board cam could always stick with visible light. That requires greater control of the environment but allows flashing synchronization.
Jack Crossfire is offline Find More Posts by Jack Crossfire
RCG Plus Member
Latest blog entry: The ultimate travel fan
Reply With Quote
Sign up now
to remove ads between posts
Reply

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold GoPro Hero with 3 lenses (Stock, IR Wide, IR Zoom/Macro) crd FPV Equipment (FS/W) 2 Oct 28, 2012 07:50 PM
Discussion Conver a balsa stick 40 plus FireChief4302 Glow to Electric Conversions 6 Aug 25, 2012 01:41 AM
Discussion Convered Dynamax Fan CoolerByTheLake Electric Ducted Fan Jet Talk 0 May 28, 2012 07:49 PM
Sold Cox Tailwind 40 convered to EP with Floats $400 LPU be69ar Aircraft - Electric - Airplanes (FS/W) 0 May 04, 2012 11:01 AM
Sold Scorpion IR Programmer & IR RX Module $5 Cabledawg1 Aircraft - Electric - Power Systems (FS/W) 2 Apr 13, 2012 07:47 PM