Audio Vario - ShikOfTheRa/scarab-osd GitHub Wiki
GPS / FC BARO / KapateinKuk Audio Vario
An Audio Vario can be added to the OSD by connecting a simple circuit to one of the pins and coupling it up to one of the pins such as RSSI or a dedicated pin for AEROMAX OSD users..
As this is rarely used functionality, to add this will require some work:
Step 1 - Building software and installing onto the OSD:
- Review Audio Vario / climbrate Settings section in config.h for enabling and user configurable settings
- Enable only one of the following-
-
- AUDIOVARIO - no additional hardware. Uses FC BARO or GPS. Typically 2 updates per second for FC. 10 for GPS
-
- KKAUDIOVARIO - which uses an I2C MS5611 pressure sensor connected to OSD hardware. Very fast and accurate. 50 updates per second
- Uploading to the OSD using Arduino
Step 2 - Configuring the vario to operate
- Display Vario must be enabled in the “Display” tab of the GUI configurator if AUDIOVARIOSWITCH enabled in config
- The vario will now sound when a screen is enabled that shows the visual vario
- and only when the throttle is below the threshold in GUI (1.8 onwards).
Step 3 Hardware
- Any unused digital output pin can be used. This can then be connected directly to the VTX audio input via a Resistor / * Capacitor setup as suggested below.
- The capacitor may not be required. It is dependent upon the input of the VTX.
- Aeromax OSD hardware has a digital pin especially for this.
