africube3.net

(export (version D)
  (design
    (source C:\Users\Shahn\africube\africube3.sch)
    (date "27-Jan-22 11:16:28 AM")
    (tool "Eeschema (5.1.9)-1")
    (sheet (number 1) (name /) (tstamps /)
      (title_block
        (title "IQ modulator 300 to 1.5Ghz")
        (company "Giga Technology")
        (rev V1.0)
        (date 2018-06-01)
        (source africube3.sch)
        (comment (number 1) (value "This Board is a an RF transmitter board for VHF and UHF"))
        (comment (number 2) (value "2m and 70cm filter"))
        (comment (number 3) (value ""))
        (comment (number 4) (value "")))))
  (components
    (comp (ref J1)
      (value "SMA Edge FM")
      (footprint Connectors_Molex:Molex_SMA_Jack_Edge_Mount)
      (libsource (lib africube3-rescue) (part Conn_Coaxial-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 59F85ADB))
    (comp (ref C3)
      (value "4.7uF 16V")
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part CP_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A12ECC9))
    (comp (ref R4)
      (value 0)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part R-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D285861))
    (comp (ref C10)
      (value 100pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2859AF))
    (comp (ref C4)
      (value 100pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28AC94))
    (comp (ref U1)
      (value TQP7M9105)
      (footprint TO_SOT_Packages_SMD:SOT-89-3_Handsoldering)
      (libsource (lib africube3-rescue) (part TQP7M9105-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28AEEE))
    (comp (ref C5)
      (value 100pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28B7CB))
    (comp (ref R3)
      (value OC)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part R-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28BAD8))
    (comp (ref R2)
      (value 0)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part R-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28BB47))
    (comp (ref L1)
      (value 12nH)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part L-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28D826))
    (comp (ref C1)
      (value 100nF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28DB31))
    (comp (ref C2)
      (value 100pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28DBEB))
    (comp (ref D1)
      (value LED)
      (footprint LEDs:LED_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part LED-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28F097))
    (comp (ref R1)
      (value 330)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part R-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28F11F))
    (comp (ref U3)
      (value BA178M05FP-E2)
      (footprint TO_SOT_Packages_SMD:TO-252-3_TabPin4)
      (libsource (lib africube3-rescue) (part BA178M05FP-E2-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2904E6))
    (comp (ref C9)
      (value "4.7uF 16V")
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part CP_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D290DB1))
    (comp (ref J2)
      (value Conn_01x04)
      (footprint Socket_Strips:Socket_Strip_Straight_1x04_Pitch2.54mm)
      (libsource (lib africube3-rescue) (part Conn_01x04-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28FFAB))
    (comp (ref L4)
      (value 0)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part L-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2C3437))
    (comp (ref C8)
      (value 10pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2C3876))
    (comp (ref L3)
      (value 0)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part L-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2D8E0C))
    (comp (ref C7)
      (value 22pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2D974B))
    (comp (ref L2)
      (value 0)
      (footprint Resistors_SMD:R_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part L-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2D9F26))
    (comp (ref C6)
      (value 12pF)
      (footprint Capacitors_SMD:C_0805_HandSoldering)
      (libsource (lib africube3-rescue) (part C_Small-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D2DA29A))
    (comp (ref J4)
      (value Conn_01x02)
      (footprint Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm)
      (libsource (lib africube3-rescue) (part Conn_01x02-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D319F18))
    (comp (ref U2)
      (value SXBP-150+)
      (footprint mini_filter:Mini-Circuits_HF1139_LandPatternPL-230)
      (libsource (lib africube3-rescue) (part SXBP-150+-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D28748A))
    (comp (ref J3)
      (value RPi_GPIO)
      (footprint Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical_SMD)
      (libsource (lib africube3-rescue) (part RPi_GPIO-_saved_africube2-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D284E9D))
    (comp (ref H4)
      (value 3mm_hole)
      (footprint MountingHole:MountingHole_3mm)
      (libsource (lib africube3-rescue) (part TEST_1P-africube_v1-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D715BCD))
    (comp (ref H3)
      (value 3mm_hole)
      (footprint MountingHole:MountingHole_3mm)
      (libsource (lib africube3-rescue) (part TEST_1P-africube_v1-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D715B54))
    (comp (ref H2)
      (value 3mm_hole)
      (footprint MountingHole:MountingHole_3mm)
      (libsource (lib africube3-rescue) (part TEST_1P-africube_v1-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D715AD8))
    (comp (ref H1)
      (value 3mm_hole)
      (footprint MountingHole:MountingHole_3mm)
      (libsource (lib africube3-rescue) (part TEST_1P-africube_v1-cache) (description ""))
      (sheetpath (names /) (tstamps /))
      (tstamp 5D715A60)))
  (libparts
    (libpart (lib africube3-rescue) (part BA178M05FP-E2-_saved_africube2-cache)
      (fields
        (field (name Reference) U)
        (field (name Value) BA178M05FP-E2-_saved_africube2-cache))
      (pins
        (pin (num 1) (name Pin) (type input))
        (pin (num 2) (name GND) (type BiDi))
        (pin (num 3) (name Pout) (type input))
        (pin (num 4) (name Gnd) (type power_in))))
    (libpart (lib africube3-rescue) (part CP_Small-_saved_africube2-cache)
      (footprints
        (fp CP_*))
      (fields
        (field (name Reference) C)
        (field (name Value) CP_Small-_saved_africube2-cache))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib africube3-rescue) (part C_Small-_saved_africube2-cache)
      (footprints
        (fp C_*))
      (fields
        (field (name Reference) C)
        (field (name Value) C_Small-_saved_africube2-cache))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib africube3-rescue) (part Conn_01x02-_saved_africube2-cache)
      (footprints
        (fp Connector*:*_??x*mm*)
        (fp Connector*:*1x??x*mm*)
        (fp Pin?Header?Straight?1X*)
        (fp Pin?Header?Angled?1X*)
        (fp Socket?Strip?Straight?1X*)
        (fp Socket?Strip?Angled?1X*))
      (fields
        (field (name Reference) J)
        (field (name Value) Conn_01x02-_saved_africube2-cache))
      (pins
        (pin (num 1) (name Pin_1) (type passive))
        (pin (num 2) (name Pin_2) (type passive))))
    (libpart (lib africube3-rescue) (part Conn_01x04-_saved_africube2-cache)
      (footprints
        (fp Connector*:*_??x*mm*)
        (fp Connector*:*1x??x*mm*)
        (fp Pin?Header?Straight?1X*)
        (fp Pin?Header?Angled?1X*)
        (fp Socket?Strip?Straight?1X*)
        (fp Socket?Strip?Angled?1X*))
      (fields
        (field (name Reference) J)
        (field (name Value) Conn_01x04-_saved_africube2-cache))
      (pins
        (pin (num 1) (name Pin_1) (type passive))
        (pin (num 2) (name Pin_2) (type passive))
        (pin (num 3) (name Pin_3) (type passive))
        (pin (num 4) (name Pin_4) (type passive))))
    (libpart (lib africube3-rescue) (part Conn_Coaxial-_saved_africube2-cache)
      (footprints
        (fp *BNC*)
        (fp *SMA*)
        (fp *SMB*)
        (fp *SMC*)
        (fp *Cinch*))
      (fields
        (field (name Reference) J)
        (field (name Value) Conn_Coaxial-_saved_africube2-cache))
      (pins
        (pin (num 1) (name In) (type passive))
        (pin (num 2) (name Ext) (type passive))))
    (libpart (lib africube3-rescue) (part L-_saved_africube2-cache)
      (footprints
        (fp Choke_*)
        (fp *Coil*)
        (fp Inductor_*)
        (fp L_*))
      (fields
        (field (name Reference) L)
        (field (name Value) L-_saved_africube2-cache))
      (pins
        (pin (num 1) (name 1) (type passive))
        (pin (num 2) (name 2) (type passive))))
    (libpart (lib africube3-rescue) (part LED-_saved_africube2-cache)
      (footprints
        (fp LED*))
      (fields
        (field (name Reference) D)
        (field (name Value) LED-_saved_africube2-cache))
      (pins
        (pin (num 1) (name K) (type passive))
        (pin (num 2) (name A) (type passive))))
    (libpart (lib africube3-rescue) (part R-_saved_africube2-cache)
      (footprints
        (fp R_*)
        (fp R_*))
      (fields
        (field (name Reference) R)
        (field (name Value) R-_saved_africube2-cache))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib africube3-rescue) (part RPi_GPIO-_saved_africube2-cache)
      (fields
        (field (name Reference) J)
        (field (name Value) RPi_GPIO-_saved_africube2-cache))
      (pins
        (pin (num 1) (name 3.3V) (type power_in))
        (pin (num 2) (name 5V) (type power_in))
        (pin (num 3) (name GPIO02_SDA1_I2C) (type BiDi))
        (pin (num 4) (name 5V) (type power_in))
        (pin (num 5) (name GPIO03_SCL1_I2C) (type BiDi))
        (pin (num 6) (name GND) (type power_in))
        (pin (num 7) (name GPIO04_GCLK) (type BiDi))
        (pin (num 8) (name GPIO14_TXD0) (type BiDi))
        (pin (num 9) (name GND) (type power_in))
        (pin (num 10) (name GPIO15_RXD0) (type BiDi))
        (pin (num 11) (name GPIO17_SPI1_CE1) (type BiDi))
        (pin (num 12) (name GPIO18) (type BiDi))
        (pin (num 13) (name GPIO27) (type BiDi))
        (pin (num 14) (name GND) (type power_in))
        (pin (num 15) (name GPIO22) (type BiDi))
        (pin (num 16) (name GPIO23) (type BiDi))
        (pin (num 17) (name 3.3V) (type power_in))
        (pin (num 18) (name GPIO24) (type BiDi))
        (pin (num 19) (name GPIO10_SPI_MOSI) (type BiDi))
        (pin (num 20) (name GND) (type power_in))
        (pin (num 21) (name GPIO09_SPI_MISO) (type BiDi))
        (pin (num 22) (name GPIO25) (type BiDi))
        (pin (num 23) (name GPIO11_SPI_CLK) (type BiDi))
        (pin (num 24) (name GPIO08_SPI_CE0_N) (type BiDi))
        (pin (num 25) (name GND) (type power_in))
        (pin (num 26) (name GPIO07_SPI_CE1_N) (type BiDi))
        (pin (num 27) (name ID_SD) (type BiDi))
        (pin (num 28) (name ID_SC) (type BiDi))
        (pin (num 29) (name GPIO05) (type BiDi))
        (pin (num 30) (name GND) (type power_in))
        (pin (num 31) (name GPIO06) (type BiDi))
        (pin (num 32) (name GPIO12) (type BiDi))
        (pin (num 33) (name GPIO13) (type BiDi))
        (pin (num 34) (name GND) (type power_in))
        (pin (num 35) (name GPIO19_SPI_MISO) (type BiDi))
        (pin (num 36) (name GPIO16_SPI1_CE2) (type BiDi))
        (pin (num 37) (name GPIO26) (type BiDi))
        (pin (num 38) (name GPIO20_SPI_MOSI) (type BiDi))
        (pin (num 39) (name GND) (type power_in))
        (pin (num 40) (name GPIO21_SPI_SCLK) (type BiDi))))
    (libpart (lib africube3-rescue) (part SXBP-150+-_saved_africube2-cache)
      (fields
        (field (name Reference) U)
        (field (name Value) SXBP-150+-_saved_africube2-cache))
      (pins
        (pin (num 1) (name RF_IN) (type input))
        (pin (num 2) (name GND) (type power_in))
        (pin (num 3) (name GND) (type power_in))
        (pin (num 4) (name GND) (type power_in))
        (pin (num 5) (name GND) (type power_in))
        (pin (num 6) (name GND) (type power_in))
        (pin (num 7) (name GND) (type power_in))
        (pin (num 8) (name RF_OUT) (type output))))
    (libpart (lib africube3-rescue) (part TEST_1P-africube_v1-cache)
      (fields
        (field (name Reference) J)
        (field (name Value) TEST_1P-africube_v1-cache))
      (pins
        (pin (num 1) (name 1) (type passive))))
    (libpart (lib africube3-rescue) (part TQP7M9105-_saved_africube2-cache)
      (fields
        (field (name Reference) U)
        (field (name Value) TQP7M9105-_saved_africube2-cache))
      (pins
        (pin (num 1) (name RFin) (type input))
        (pin (num 2) (name GND) (type passive))
        (pin (num 3) (name RFout) (type output)))))
  (libraries
    (library (logical africube3-rescue)
      (uri C:\Users\Shahn\africube/africube3-rescue.lib)))
  (nets
    (net (code 1) (name "Net-(C5-Pad1)")
      (node (ref U2) (pin 1))
      (node (ref C5) (pin 1)))
    (net (code 2) (name GND)
      (node (ref C1) (pin 1))
      (node (ref D1) (pin 1))
      (node (ref C2) (pin 1))
      (node (ref C9) (pin 2))
      (node (ref H1) (pin 1))
      (node (ref H2) (pin 1))
      (node (ref H3) (pin 1))
      (node (ref H4) (pin 1))
      (node (ref J3) (pin 9))
      (node (ref J3) (pin 6))
      (node (ref J3) (pin 39))
      (node (ref J3) (pin 34))
      (node (ref J3) (pin 14))
      (node (ref R3) (pin 2))
      (node (ref C6) (pin 1))
      (node (ref C7) (pin 1))
      (node (ref C8) (pin 1))
      (node (ref J2) (pin 4))
      (node (ref J2) (pin 1))
      (node (ref J1) (pin 2))
      (node (ref U2) (pin 2))
      (node (ref U3) (pin 4))
      (node (ref U3) (pin 2))
      (node (ref U1) (pin 2))
      (node (ref C3) (pin 2))
      (node (ref U2) (pin 7))
      (node (ref U2) (pin 6))
      (node (ref U2) (pin 5))
      (node (ref U2) (pin 4))
      (node (ref J3) (pin 30))
      (node (ref U2) (pin 3))
      (node (ref J3) (pin 25))
      (node (ref J3) (pin 20)))
    (net (code 3) (name "Net-(J3-Pad1)")
      (node (ref J3) (pin 1)))
    (net (code 4) (name "Net-(C9-Pad1)")
      (node (ref J2) (pin 2))
      (node (ref C9) (pin 1))
      (node (ref U3) (pin 1)))
    (net (code 5) (name "Net-(J3-Pad17)")
      (node (ref J3) (pin 17)))
    (net (code 6) (name "Net-(J3-Pad5)")
      (node (ref J3) (pin 5)))
    (net (code 7) (name "Net-(J3-Pad3)")
      (node (ref J3) (pin 3)))
    (net (code 8) (name "Net-(J1-Pad1)")
      (node (ref U2) (pin 8))
      (node (ref J1) (pin 1)))
    (net (code 9) (name "Net-(C5-Pad2)")
      (node (ref C5) (pin 2))
      (node (ref L3) (pin 1))
      (node (ref C7) (pin 2)))
    (net (code 10) (name "Net-(D1-Pad2)")
      (node (ref R1) (pin 2))
      (node (ref D1) (pin 2)))
    (net (code 11) (name "Net-(L1-Pad2)")
      (node (ref L3) (pin 2))
      (node (ref U1) (pin 3))
      (node (ref L1) (pin 2)))
    (net (code 12) (name "Net-(C4-Pad1)")
      (node (ref C4) (pin 1))
      (node (ref C6) (pin 2))
      (node (ref L2) (pin 2)))
    (net (code 13) (name "Net-(C10-Pad1)")
      (node (ref C10) (pin 1))
      (node (ref L4) (pin 1)))
    (net (code 14) (name "Net-(L2-Pad1)")
      (node (ref L2) (pin 1))
      (node (ref U1) (pin 1)))
    (net (code 15) (name "Net-(J3-Pad23)")
      (node (ref J3) (pin 23)))
    (net (code 16) (name "Net-(J3-Pad31)")
      (node (ref J3) (pin 31)))
    (net (code 17) (name "Net-(J3-Pad29)")
      (node (ref J3) (pin 29)))
    (net (code 18) (name "Net-(J3-Pad28)")
      (node (ref J3) (pin 28)))
    (net (code 19) (name "Net-(J3-Pad27)")
      (node (ref J3) (pin 27)))
    (net (code 20) (name "Net-(J3-Pad26)")
      (node (ref J3) (pin 26)))
    (net (code 21) (name "Net-(J3-Pad24)")
      (node (ref J3) (pin 24)))
    (net (code 22) (name "Net-(J3-Pad32)")
      (node (ref J3) (pin 32)))
    (net (code 23) (name "Net-(J3-Pad22)")
      (node (ref J3) (pin 22)))
    (net (code 24) (name "Net-(J3-Pad21)")
      (node (ref J3) (pin 21)))
    (net (code 25) (name "Net-(J3-Pad2)")
      (node (ref J3) (pin 4))
      (node (ref J3) (pin 2))
      (node (ref J4) (pin 2)))
    (net (code 26) (name "Net-(J3-Pad19)")
      (node (ref J3) (pin 19)))
    (net (code 27) (name "Net-(J3-Pad18)")
      (node (ref J3) (pin 18)))
    (net (code 28) (name "Net-(J3-Pad16)")
      (node (ref J3) (pin 16)))
    (net (code 29) (name "Net-(J3-Pad40)")
      (node (ref J3) (pin 40)))
    (net (code 30) (name "Net-(J3-Pad8)")
      (node (ref J3) (pin 8)))
    (net (code 31) (name "Net-(J3-Pad15)")
      (node (ref J3) (pin 15)))
    (net (code 32) (name "Net-(J3-Pad38)")
      (node (ref J3) (pin 38)))
    (net (code 33) (name "Net-(J3-Pad37)")
      (node (ref J3) (pin 37)))
    (net (code 34) (name "Net-(J3-Pad36)")
      (node (ref J3) (pin 36)))
    (net (code 35) (name "Net-(J3-Pad35)")
      (node (ref J3) (pin 35)))
    (net (code 36) (name "Net-(J3-Pad33)")
      (node (ref J3) (pin 33)))
    (net (code 37) (name "Net-(J3-Pad13)")
      (node (ref J3) (pin 13)))
    (net (code 38) (name "Net-(J3-Pad12)")
      (node (ref J3) (pin 12)))
    (net (code 39) (name "Net-(J3-Pad11)")
      (node (ref J3) (pin 11)))
    (net (code 40) (name "Net-(J3-Pad10)")
      (node (ref J3) (pin 10)))
    (net (code 41) (name +5V)
      (node (ref J2) (pin 3))
      (node (ref U3) (pin 3))
      (node (ref J4) (pin 1))
      (node (ref L1) (pin 1))
      (node (ref R1) (pin 1))
      (node (ref C3) (pin 1))
      (node (ref C2) (pin 2))
      (node (ref C1) (pin 2)))
    (net (code 42) (name "Net-(C10-Pad2)")
      (node (ref J3) (pin 7))
      (node (ref C10) (pin 2)))
    (net (code 43) (name "Net-(C8-Pad2)")
      (node (ref L4) (pin 2))
      (node (ref C8) (pin 2))
      (node (ref R4) (pin 1)))
    (net (code 44) (name "Net-(C4-Pad2)")
      (node (ref R2) (pin 2))
      (node (ref C4) (pin 2)))
    (net (code 45) (name "Net-(R2-Pad1)")
      (node (ref R4) (pin 2))
      (node (ref R2) (pin 1))
      (node (ref R3) (pin 1)))))