Open interface III

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!The hardware !!Front side [https://remoteqth.com/img/wiki-open-interface-3-01.png|noborder] *'''1 - PTT LED''' - shows the activation PA PTT output (no activate from PTT1, PTT2 orPTT-SSB) *'''2 - CW LED''' - shows the activation of one of two CW outputs (CW1, CW-232) *'''3 - FSK LED''' - shows the activation of one of two FSK outputs (FSK-Arduino, FSK-232) *'''4 - Rotary encoder''' - change WPM speed in CWK and CWD MODE, and select MENU in other mode *'''5 - SET/MEM 0 button''' - has functions depending on the selected MODE **in CWD and CWK MODE activate/deactivate Command mode **in FSK MODE activate transmit Memory-0 *'''6 - MEM 1-2 button''' - in CWD CWK FSK MODE activate two memories *'''7 - MODE button''' **'''Short''' press MODE changes in the order |CWK >CWD |SSB >FSK |FSK |DIG **'''Long''' press activate MENU on LCD. In the menu, move with the rotary encoder or short press MODE button. Return change after 3 seconds without change *'''8 - LCD display''' ** First line show *** transmiting CW character *** transmiting RTTY character from Arduino uppercase *** transmiting RTTY character from PC lowercase ** Second line show *** First eleven characters - selected MENU *** Second four characters - active MODE or numbers MENU *** Last characters - show microSD card icon, if pluged *'''9 - TX audio + button''' - volume UP *'''10 - TX audio - button''' - volume DOWN *'''11 - TX audio mute button''' - MUTE *'''12 - RX volume potentiometer''' - receiving signal level !!Rear side [https://remoteqth.com/img/wiki-open-interface-3-02.png|noborder] *'''13 - SEQUENCER output''' CINCH - open collector (MAX 50V/500mA) *'''14 - PA-PTT output''' CINCH - dependency to rear PA PTT switch ** Open collector (MAX 50V/500mA) ** Relay (MAX 0,5A/125V AC, or 1A/24V DC) *'''15 - LAN''' - RJ45 connector - (if Ethernet optional module installed) *'''16 - TRX GND''' - M4 screw *'''17 - MIC''' - Jack 3,5mm - [microphone input|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Microphone] - need preset input switch, dependency on type microphone used ** Dynamic microphone - JP7 open ** Electret microphone - JP7 short *'''18 - RADIO''' - D-SUB 25 pin female connector [Pin connection|https://remoteqth.com/wiki/index.php?page=Open+interface+III#RADIO_25_pin_D_SUB] *'''19 - PA PTT''' - manual switch - select what circuit will be switch PA-PTT output (CINCH and pin7 in RADIO connector) ** Open collector (MAX 50V/500mA) ** Relay (MAX 0,5A/125V AC, or 1A/24V DC) *'''20 - PC USB''' - USB B type connector for PC, with isolated ground *'''21 - FOOT SWITCH''' - CINCH - SSB PTT input is activated by grounding center pin *'''22 - INTERLOCK''' - CINCH - input is activated by grounding center pin - switches OFF all PTT signals, defined by Sequencer delay *'''23 - ACC''' - HDMI type - by default blinded [Read warning first!|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Accessory_connector__HDMI_] *'''24 - POWER''' - input - DC jack 2,1/5,5mm diameter to connect input power 8-18V DC (center positive) with consumption 160mA/12V *'''25 - PADDLE''' - input - [Pinout|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Paddle] *'''26 - HOLES''' - mount two optional switches, connect to any internal jumper on board - for example enable reset (JP3), or DTR to CW/FSK (JP4) !!Left side *'''microSD''' card slot *'''RESET''' button !!Block diagram [https://remoteqth.com/img/wiki-open-interface-3-03.png] !!Circuits * [sch.svg|https://remoteqth.com/hw/open-interface-31415.svg] !!How to open the enclosure box * Unscrew ** two screws on the rear side, near RCA connector ** three screws on the left side ** three screws on the right side * When '''closing''' proceed in the reverse order !!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] !!Board adjust *'''P4 - LCD contrast''' potentiometer *'''P2 - TX USB souncard to front Microphone volume''' potentiometer adjust transmit audio volume if activate MODE SSB. Suitable for playing voice memory. !!How to install Ethernet module Compatible with ethernet module USR-ES1 ([datasheet|https://remoteqth.com/hw/usr-es1-v1.3.pdf]) * Turn power OFF * [Open the enclosure box|https://remoteqth.com/wiki/index.php?page=Open+interface+III#How_to_open_the_enclosure_box] * Plug module to U9 pin strip * Break out with a knife or thin screwdriver blind and open for RJ49 ethernet connector in rear side of box. * [Configure|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Configure] firmware for [Ethernet|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Ethernet] module * [Short JP3|https://remoteqth.com/wiki/index.php?page=Open+interface+III#How_to_upload] jumper before upload * Close enclosure !!Internal connectors *'''K2''' - ATmega Serial3 UART (5V) RXD, TXD, GND *'''P7''' - ICSP connector for directly programing ATmega chip - need for upload bootloader contains GND RESET MOSI SCK +5V MISO *'''P9''' - free USB4 output from USB hub - same signal available on rear DB-25 connector !!Not staffed parts *'''R6''' package 0805 - activate voltage divider with R9, can reduce audio signal output level *'''C71''' package C - will increase RX audio preamp gain *'''C50''' package 0805 - activate Left channel output (TX) from USB sound card *'''D15, D16, D17''' package 0805 - always activate PA PTT output (solved in firmware via sequencer function) *'''JP1''' two pin jumper - short on PCB !!Hardware dependency | '''Mode''' | 2 Source | 2 Outs | | | '''PTT''' | '''CW/FSK''' | WINKEY | AFSK | | CWK - CW keyer | PTT1 | CW1/2 | HIGH | LOW | | >CWD - CW daemon (PC) | RTS | DTR* | LOW | LOW | | SSB - LSB-USB-FM | RTS/FootSW | - | LOW | LOW | | >FSK - EXTFSK| RTS | DTR* | LOW | LOW | | FSK - Serial ascii | PTT1 | Serial | HIGH | LOW | | DIG - USB audio codec (AFSK) | RTS | - | LOW | HIGH | * JP4 jumper must be set CW or FSK ''Note - character ">" shown external signal source'' * WINKEY HIGH - disable DTR/RTS * AFSK HIGH - switch TX audio path !!Problems * '''Disconnecting the USB''' causes high potential (measured 80V AC) between USB-GND and GND-TRX, is usually enough: ** Grounded case ** Replace the power supply (not the male switched adapter without grounding pin in the drawer)
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