Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Topics - Maxx2206

Pages: 1
1
Other / pulsed (pwm) leds?
« on: June 01, 2008, 09:03:26 PM »
hi,

has anyone yet successfully tried to use pwm driven leds for head tracking projects to save power?
i was wondering if driving the leds (preferably 940nm since thats apparently the highest sensitivity wavelength) with e.g. a small ATiny uC and pulse the output at some 10khz and 20-50% active state would still be sensed properly by the module or if it would result in noticable loss of quality.
i just began experimenting with the wiimote and im still away from actually deslodering the module (unless someone finds out where to buy them anyway ;) ), so maybe someone who already started using the module independently via i2c could run some tests and see if pulsing the leds would still give stable and strong readings.

in theory the scan should still be good if the pulsewidth is high enough, even with shorter active states, but the battery saving should be remarkable. that would be especially convenient for head tracking projects where people want good recognition without the need to build a massive ir led array (which would most likely be mandatory if you want to use reflectors and not active leds applied to your head, right?).

looking forward to hear your ideas/thoughts...

2
General Discussion / camera module, any maker known?
« on: June 01, 2008, 08:40:50 PM »
hi,

although theres quite some technical info available about pinout and the i2c protocol, i'd like to know if anyone ever found out who makes those modules or if they are freely available on the market - with the same or at least similar specs?

cyas...

Pages: 1