Hello.
I'm building and programming my own UAV using an Arduino Duemilanove. Yesterday I made a leap and the board is now controlling the servos and with fake position (no GPS connected yet) it tries to turn the plane to the right direction.
The maiden flight approaches and for the first test flight I will need an auto/transmitter switcher. I saw the FailSafeMux in store but I wanted to make my own solution.
The question now is. Could this work?
Concept:
A switching signal from the Arduino board decides whether to use the signals from the Arduino or from the receiver. (1 is Auto, 0 transmitter).
Replies
If you don't want to use the DIY mux, OK.
Why not just use a generic mux chip?I don't know what parts availability you have in your country, but a 16 pin thru-hole DIP package quad 2 to 1 mux, such as the 74LS157 used in the DIYdrones mux is $0.75 qty 1 at Digikey here in the US.
Your circuit may or may not "work", but it won't switch between RX and Arduino for inputs. When D2 goes high, the left transistor will go into conduction, grounding the pulse input to the servo, causing it to ignore both the RX and the Arduino. I would not label this a switch, rather a "deafener."