Arduino SX70 port cheat sheet
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new PCB "U2" input/output order
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ArduinodescriptionswitchPin typeHIGHLOWcomment
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-ArduinoCTSStandard FTDI pin NOT CONNECTED
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A0Prevents firing flash if film pack counter is on «0».S9236Vinputclosedopenhave to lower input to 3.3Vx
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A1Enables (with S7 closed) the circuitry to eject dark slide.Opens again after the dark slide is ejected.S8246Vinputclosedopenhave to lower input to 3,3Vx
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A2MotorMotor25outputonoffchanged 2017/12/20x
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AD3Connects circuitry to detect flash inserted in cameraS226gndinputonoff1-wire signal - testedx
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AD427Need to use one of these for sonar.x
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AD528
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AD610
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A722
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D0Arduino30RxD RxDx
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D1Arduino31TxDStandard FTDI pinTxDx
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D2Connects circuitry to detect flash inserted in camera.S232gndinputonoff1-wire signal - testedwant to change this to an analog input comp. other donglesx
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D3Solenoid #1 powerSOL11AO3400outputonoffFor fast PWM code affects D11 & D3x
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D4FlashFF2FFAx
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D7Stops motor both by closing and opening depeending uponsequence of action and internal circuitry.S511gndinputopenclosedx
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D8Initiates «Y», 40 milliseconds delay. (Power down solenoid #2 in the flash mode)S312gndinputopenclosedx
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D913
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D1014
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D11Solenoid #2 powerSOL215MOSIoutputalso SOL2MOSIx
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D12red shutter button: Initiates exposure cycle.S116gndinputopenclosedtestedMISO
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D13LED1Arduino17SCKoutputsame as built-in LEDSCKx
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PB5LighrtMeterArduino9x
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PC6NOT USABLEArduino29RESETeventually DTRRESET
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PC6NOT USABLEArduino29DTRStandard FTDI pinDTR
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