For $40 USD + shipping you can grab a Walkera UFO replacement PCB which has three ENC-03 piezoelectric gyroscope sensors and a MMA7260 triple axis accelerometer sensor on a daughter-board. This is a great deal considering the prices of these components individually. However it took over a month for Walkera to backorder and then ship it.
The daughter-board can be de-soldered from the main board and it also has a bunch of passive components for some noise filtering. Ive tested this daughter-board and the signals are well within specifications. Heres some more info about this board.
The main board also has a PCM receiver that you can desolder and use with a PCM transmitter.
Tags: quadrotor sensor
Quadrotor Helicopter Blades Arrived
The EPP1045 propellers arrived from Tech Model Products the shipping was $5.50 and arrived in less than a week.
This is the first time Ive worked with RC airplane parts. I thought propellers are usually held in place by friction between the hub and the nut that goes on the threaded shaft of the motor. It turns out that the hub on the propellers have a hexagonal recess so the blades dont freespin on the shaft. I have also ordered prop-savers but now it seems like they will be optional (whereas before I thought they would be necessary).
The nut on the shaft may still eventually vibrate loose I will need to check out things such as spring washers and Loctite. Prop-savers have screws but I dont know whether or not they grab onto the shaft well.
Tags: quadrotor