User Manual

Version 1.0 - May 26, 2011
3
glow solid when a good RC signal is detected. If the signal is lost or goes out of the legal
range the status LED will blink.
See below for instructions on using the limit switch inputs and for configuring the internal
voltage regulator and BEC for your setup.
LED Indicators
The Wasp has two LEDs used for visual indication of the state of the unit. The Status LED is
green and shows the status of the RC signal to the unit. If the Status LED is blinking either
the RC input signal is absent or out of the legal range. A solid Status LED indicates a good
RC signal and the unit is ready to receive commands.
The red/green Motor LED shows the direction and relative power output command from the
on-board CPU to the MOSFET chips. The color of the LED (red or green) indicates direction
and the brightness of the LED indicates the amount of power available to the motor. Off
indicates 0% power and full brightness indicates 100% battery voltage applied to the motor.
If the the RC signal (stick) is at neutral and the motor LED is not off or if the motor LED does
not go to full brightness in either or both directions the unit must be calibrated to store the
input signal range to the full range of the Wasp. The radio trim and ATV controls can also be
used to match the radio to the Wasp. See below for instructions on performing calibration.
5V BEC Disable
Near the motor LED is a small wire loop soldered to the Wasp circuit board. This is provided
to disable the internal 5V regulator. Above about 21V battery voltage the internal regulator will
overheat due to a limitation in its design. When operating above 21V an external 5V supply
must be used to power the Wasp’s CPU and internal circuits.
Cutting this loop disconnects the battery voltage input to the internal regulator chip. When this
loop is cut the on-board CPU and other circuits must be powered through the center wire of
the RC cable i.e. a receiver battery must be used to power the Wasp’s CPU.
If the Wasp BEC is not needed to power the receiver you can disconnect the center wire of
the RC cable either by cutting it or by pulling it from the connector shell. This allows the
internal voltage regulator to power the Wasp CPU but does not connect the 5V Wasp supply
to the receiver positive power pins. This is usually done when an external BEC or battery is
used to power the receiver or when several Wasps or other units with BEC are connected to a
single receiver. Only one BEC connection is needed to power the receiver so other units
should disconnect their 5V positive connections to avoid conflicts between the different 5V
regulators.