SuperRoach wrote:120-200mv should be fine. We've had people use a 200mv tx+75mv camera alright. The battery did take a hit though.
Um? I think you are talking mA. (milli amps) The issue I had was that the voltage supply of 2.8v was too low to drive the mouse chip. The battery can be up to something like 4.1v, which is too high for the mouse chip. However there is a 5v - 3.3v converter on the mouse module with a very low "dropout" voltage of 0.2v. So a battery voltage of 3.5v and above should be enough to drive the voltage regulator that will drive the mouse chip. (I had expected a typical dropout voltage of 1v or more.)
OK, this project is still ticking over in the background. Been trying to find some good inflight parts for connecting to the extention port.
See: http://forum.bitcraze.se/viewtopic.php?f=6&t=518
So I am abit over budget with payload. The Module with the lens mount is 7.69gm the suplied lens is very good quality but is 5.29gm. So the total is 12.98gm.
However I got a usb webcam off wbay for a few quid and it has a real cheep plastic lens that is 1.51gm. Its probably a different focal length so I will have to experiment with it. Also the original lens is for IR, not sure if the new one is and how much difference this will make.
Another issue bubling in the background is running the SPI at 2MHZ or less. Not used the Micro controller before the flie project. I think I can work it out with the manual and the periph support lib suplied but if anyone knows how to do this off the top of their head this would help. I seam to remember seeing the clock divider in the docs but for some reason the periph support lib did not go as low as 2MHZ. As I said, I think I can work it outt, but if someone has used this chip before the insider knowlage would be very useful.
I'm just started to work with the crazy flie but i'm trying to make the flie completely automomus. For this porpos I was thinking your same solution: mous optical flow!
Altought i'm new about programming firmware and so on, actually I would learn from you and may be cooperate with you!