Difference between revisions of "DATV repeater audio switch"
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The 8 channel input audio switch was designed to meet the needs of the GB3SQ TV repeater. | The 8 channel input audio switch was designed to meet the needs of the GB3SQ TV repeater. | ||
| − | It is controlled by i2c and is supported | + | It is controlled by i2c and is supported by the BATC repeater controller - i2c commands are listed in the MCP23089datasheet [https://ww1.microchip.com/downloads/en/DeviceDoc/21919e.pdf here.] |
It can be configured as an 8 channel mixer with two outputs or as two 4 channel mixers with one output each. Also an unused input can be populated to be a high current open-drain output. The 8 switch elements are addressed via I2C. | It can be configured as an 8 channel mixer with two outputs or as two 4 channel mixers with one output each. Also an unused input can be populated to be a high current open-drain output. The 8 switch elements are addressed via I2C. | ||
Revision as of 09:33, 17 February 2022
The 8 channel input audio switch was designed to meet the needs of the GB3SQ TV repeater.
It is controlled by i2c and is supported by the BATC repeater controller - i2c commands are listed in the MCP23089datasheet here.
It can be configured as an 8 channel mixer with two outputs or as two 4 channel mixers with one output each. Also an unused input can be populated to be a high current open-drain output. The 8 switch elements are addressed via I2C.
Schematics and BOM
Schematic: media:REPEATER I2C Audio Switch V2022 SCH.pdf
Silk screen: File:REPEATER I2C Audio Switch V2022 SS.pdf
Parts list: File:REPEATER I2C AUDIO SWITCH PARTS V2022.xlsx