Friday, April 13, 2018

Air Hogs battle Tracker Hacked

I bought an Air Hogs "Battle Tracker" Nerf Missile launcher hoping to put on my Devastator tank.  It is obviously way too big for that!  However I still hope to interface it to an Arduino or Raspberry Pi and add the ability to track targets perhaps by Infrared.

The wired interface appears to be a voltage divider so each button returns a voltage.

Power and ground to the control panel is 3 volts (could be a low battery).  The normal return voltage on the two data lines is 1 volts.  
Pressing the "Fire" button changed PB1 to 2 volts.
Pressing "UP" and "Down" changes PB1 to 1.2 and 1.3 volts
Pressing "Right" and "Left" changes PB2 to 1.2 and 1.3 Volts.

Here is the control circuit board.  I am working on the schematic.

Here is the schematic diagram.  The resistors were measured in circuit so they are off a little bit.  The 32K resistors might be labeled "513" as in 51K.
I rebuilt a solid state relay board to interface to the Nerf missile launcher.  I used this same board years ago to control a phone to light message waiting lights....

However when I tapped into the control board two resistors were destroyed.  R33 and R34 are gone.  I need to come up with a better way to interface to the control board.

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