Open interface III

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!!Board jumper preset First you have to [open the enclosure box|https://remoteqth.com/wiki/index.php?page=Open+interface+III#How_to_open_the_enclosure_box] *'''JP4 - DTR to CW/FSK''' - select DTR output from USB/serial interface to activate keying CW or FSK output *'''JP3 - Auto reset ON''' - enabling reset from serial DTR pin to Arduino **SHORT - enable - need only for upload firmware **OPEN - disable - standard operation *'''JP5 - Self reset ON''' - allows Arduino self reset from D39 output (not use) ** by default OPEN *'''JP10 - CAT Icom/Other''' - select between Icom CI-V and other TRX bus **'''Icom''' - left **'''Other TRX''' - right *'''JP7 - DC to MIC''' - allows DC voltage from TRX to your microphone ** OPEN for dynamic microphone ** SHORT for elecret microphone *'''P5 - CAT TTL/232 ''' - select between two logical level **5V TTL - '''ICOM''' **+-12V RS232 [https://remoteqth.com/img/wiki-open-interface-3-05.png|noborder]
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