V_AMP.net 18.4 KB
Newer Older
1 2
(export (version D)
  (design
3 4
    (source /home/alissomc/SADAMAP/Circuits/V_AMP/V_AMP.sch)
    (date "Qua 31 Jan 2018 17:52:49 -02")
5 6 7 8 9 10
    (tool "Eeschema 4.0.7-e2-6376~58~ubuntu14.04.1")
    (sheet (number 1) (name /) (tstamps /)
      (title_block
        (title "10x to 100x Precision Pre-Amplifier for Generic Sensors ")
        (company "LAPMA - IF/UFRGS")
        (rev 1)
11
        (date 2017-12-18)
12
        (source V_AMP.sch)
13
        (comment (number 1) (value "All resistors are 1/8W, except R16 and R17, 1W. The RX resistor is an optional attenuator"))
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
        (comment (number 2) (value "There's a saturation indicator for output higher than 5V"))
        (comment (number 3) (value "The gain adjust must be set for a range in 0 to 5V output voltage"))
        (comment (number 4) (value "Designed by Alisson Claudino")))))
  (components
    (comp (ref P1)
      (value INPUT)
      (footprint Connectors:bnc-ci)
      (libsource (lib conn) (part BNC))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C4F0))
    (comp (ref R1)
      (value 100k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C581))
    (comp (ref R2)
      (value 1k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C5A4))
    (comp (ref D1)
      (value 5V1)
      (footprint Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal)
      (libsource (lib device) (part ZENERsmall))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C65F))
    (comp (ref D2)
      (value 5V1)
      (footprint Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal)
      (libsource (lib device) (part ZENERsmall))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C6AA))
    (comp (ref C1)
      (value 470n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C721))
    (comp (ref R3)
      (value 22k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C746))
    (comp (ref U1)
61
      (value OPA277)
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256
      (footprint Housings_DIP:DIP-8_W7.62mm_Socket_LongPads)
      (libsource (lib linear) (part OPA177))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26C7F5))
    (comp (ref R4)
      (value 20k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CA07))
    (comp (ref R5)
      (value 180k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CA58))
    (comp (ref C2)
      (value 220n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CAE2))
    (comp (ref C4)
      (value 100n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CB62))
    (comp (ref R10)
      (value 10k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CE37))
    (comp (ref C7)
      (value 220n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26CE98))
    (comp (ref R11)
      (value RX)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26D0A3))
    (comp (ref R13)
      (value 27k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26D32E))
    (comp (ref C8)
      (value 100n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26D3BD))
    (comp (ref C9)
      (value 220n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26D71B))
    (comp (ref R12)
      (value 2k7)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26E247))
    (comp (ref RV1)
      (value 50k)
      (footprint Potentiometers:Potentiometer_Alps_RK163_Single_Vertical)
      (libsource (lib device) (part POT))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26E36E))
    (comp (ref P2)
      (value GAIN_ADJ)
      (footprint w_pin_strip:pin_strip_2mm_2)
      (libsource (lib conn) (part CONN_01X02))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26E467))
    (comp (ref R14)
      (value 100)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26E913))
    (comp (ref D4)
      (value 5V1)
      (footprint Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal)
      (libsource (lib device) (part ZENERsmall))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26EA1B))
    (comp (ref P3)
      (value "OUTPUT (0-5V)")
      (footprint Connectors:bnc-ci)
      (libsource (lib conn) (part BNC))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26ED35))
    (comp (ref U2)
      (value LM393)
      (footprint Housings_DIP:DIP-8_W7.62mm_Socket_LongPads)
      (libsource (lib linear) (part LM393))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26F9BB))
    (comp (ref R8)
      (value 2k7)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A2700C8))
    (comp (ref C5)
      (value 100n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A270604))
    (comp (ref C3)
      (value 100n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A27161E))
    (comp (ref R6)
      (value 3k3)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A2721C9))
    (comp (ref R7)
      (value 5k6)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A27226A))
    (comp (ref C6)
      (value 100n)
      (footprint Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm)
      (libsource (lib device) (part C_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A272687))
    (comp (ref R9)
      (value 27k)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A272BF7))
    (comp (ref D3)
      (value 1N4148)
      (footprint Diodes_THT:D_DO-35_SOD27_P7.62mm_Horizontal)
      (libsource (lib device) (part D_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A272D8D))
    (comp (ref D5)
      (value SATURATION_LED)
      (footprint LEDs:LED_D5.0mm)
      (libsource (lib device) (part LED))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A27312A))
    (comp (ref R15)
      (value 2k7)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A2731DD))
    (comp (ref R16)
      (value 10)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A275E4B))
    (comp (ref R17)
      (value 10)
      (footprint w_pth_resistors:RC03)
      (libsource (lib device) (part R))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A275FB0))
    (comp (ref C10)
      (value 22u)
      (footprint Capacitors_THT:CP_Radial_D5.0mm_P2.50mm)
      (libsource (lib device) (part CP_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A276093))
    (comp (ref C11)
      (value 22u)
      (footprint Capacitors_THT:CP_Radial_D5.0mm_P2.50mm)
      (libsource (lib device) (part CP_Small))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A276151))
    (comp (ref P4)
      (value POWER)
      (footprint Connectors:bornier3)
      (libsource (lib conn) (part CONN_01X03))
      (sheetpath (names /) (tstamps /))
257 258 259 260 261 262 263
      (tstamp 5A37B0B0))
    (comp (ref U3)
      (value OPA277)
      (footprint Housings_DIP:DIP-8_W7.62mm_Socket_LongPads)
      (libsource (lib linear) (part OPA177))
      (sheetpath (names /) (tstamps /))
      (tstamp 5A26D235)))
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
  (libparts
    (libpart (lib conn) (part BNC)
      (footprints
        (fp BNC_*)
        (fp bnc)
        (fp bnc-*))
      (fields
        (field (name Reference) P)
        (field (name Value) BNC))
      (pins
        (pin (num 1) (name In) (type passive))
        (pin (num 2) (name Ext) (type passive))))
    (libpart (lib device) (part C)
      (description "Unpolarized capacitor")
      (footprints
        (fp C?)
        (fp C_????_*)
        (fp C_????)
        (fp SMD*_c)
        (fp Capacitor*))
      (fields
        (field (name Reference) C)
        (field (name Value) C))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib conn) (part CONN_01X02)
      (description "Connector 01x02")
      (footprints
        (fp Pin_Header_Straight_1X02)
        (fp Pin_Header_Angled_1X02)
        (fp Socket_Strip_Straight_1X02)
        (fp Socket_Strip_Angled_1X02))
      (fields
        (field (name Reference) P)
        (field (name Value) CONN_01X02))
      (pins
        (pin (num 1) (name P1) (type passive))
        (pin (num 2) (name P2) (type passive))))
    (libpart (lib conn) (part CONN_01X03)
      (description "Connector 01x03")
      (footprints
        (fp Pin_Header_Straight_1X03)
        (fp Pin_Header_Angled_1X03)
        (fp Socket_Strip_Straight_1X03)
        (fp Socket_Strip_Angled_1X03))
      (fields
        (field (name Reference) P)
        (field (name Value) CONN_01X03))
      (pins
        (pin (num 1) (name P1) (type passive))
        (pin (num 2) (name P2) (type passive))
        (pin (num 3) (name P3) (type passive))))
    (libpart (lib device) (part CP_Small)
      (description "Polarised capacitor")
      (footprints
        (fp CP*)
        (fp Elko*)
        (fp TantalC*)
        (fp C*elec)
        (fp c_elec*)
        (fp SMD*_Pol))
      (fields
        (field (name Reference) C)
        (field (name Value) CP_Small))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib device) (part C_Small)
      (description "Unpolarized capacitor")
      (footprints
        (fp C?)
        (fp C_????_*)
        (fp C_????)
        (fp SMD*_c)
        (fp Capacitor*))
      (fields
        (field (name Reference) C)
        (field (name Value) C_Small))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib device) (part D_Small)
      (description Diode)
      (footprints
        (fp Diode_*)
        (fp D-Pak_TO252AA)
        (fp *SingleDiode)
        (fp *SingleDiode*)
        (fp *_Diode_*))
      (fields
        (field (name Reference) D)
        (field (name Value) D_Small))
      (pins
        (pin (num 1) (name K) (type passive))
        (pin (num 2) (name A) (type passive))))
    (libpart (lib device) (part LED)
      (footprints
        (fp LED-3MM)
        (fp LED-5MM)
        (fp LED-10MM)
        (fp LED-0603)
        (fp LED-0805)
        (fp LED-1206)
        (fp LEDV))
      (fields
        (field (name Reference) D)
        (field (name Value) LED))
      (pins
        (pin (num 1) (name K) (type passive))
        (pin (num 2) (name A) (type passive))))
    (libpart (lib linear) (part LM2903)
      (aliases
        (alias LM293)
        (alias LM393)
        (alias LM193))
      (description "Dual Voltage Comparator")
      (docs ns/lm193.pdf)
      (fields
        (field (name Reference) U)
        (field (name Value) LM2903))
      (pins
        (pin (num 1) (name ~) (type openCol))
        (pin (num 2) (name _) (type input))
        (pin (num 3) (name +) (type input))
        (pin (num 4) (name V-) (type power_in))
        (pin (num 5) (name +) (type input))
        (pin (num 6) (name _) (type input))
        (pin (num 7) (name ~) (type openCol))
        (pin (num 8) (name V+) (type power_in))))
    (libpart (lib linear) (part OPA177)
      (description "Precision Op Amp")
      (docs AmpliOp.sch)
      (fields
        (field (name Reference) U)
        (field (name Value) OPA177))
      (pins
        (pin (num 1) (name BAL/COMP) (type passive))
        (pin (num 2) (name INVERTING) (type input))
        (pin (num 3) (name NON) (type input))
        (pin (num 4) (name V-) (type power_in))
        (pin (num 5) (name BALANCE) (type passive))
        (pin (num 6) (name OUTPUT) (type output))
        (pin (num 7) (name V+) (type power_in))
        (pin (num 8) (name COMP) (type passive))))
    (libpart (lib device) (part POT)
      (description Potentionmetre)
      (fields
        (field (name Reference) RV)
        (field (name Value) POT))
      (pins
        (pin (num 1) (name 1) (type passive))
        (pin (num 2) (name 2) (type passive))
        (pin (num 3) (name 3) (type passive))))
    (libpart (lib device) (part R)
      (description Resistor)
      (footprints
        (fp R_*)
        (fp Resistor_*))
      (fields
        (field (name Reference) R)
        (field (name Value) R))
      (pins
        (pin (num 1) (name ~) (type passive))
        (pin (num 2) (name ~) (type passive))))
    (libpart (lib device) (part ZENERsmall)
      (footprints
        (fp D?)
        (fp SO*)
        (fp SM*))
      (fields
        (field (name Reference) D)
        (field (name Value) ZENERsmall))
      (pins
        (pin (num 1) (name K) (type passive))
        (pin (num 2) (name A) (type passive)))))
  (libraries
    (library (logical conn)
      (uri /usr/share/kicad/library/conn.lib))
    (library (logical device)
444 445 446
      (uri /usr/share/kicad/library/device.lib))
    (library (logical linear)
      (uri /usr/share/kicad/library/linear.lib)))
447
  (nets
448
    (net (code 1) (name "Net-(D4-Pad1)")
449
      (node (ref D4) (pin 1))
450 451 452
      (node (ref P3) (pin 1))
      (node (ref R14) (pin 1)))
    (net (code 2) (name "Net-(R12-Pad2)")
453 454
      (node (ref R12) (pin 2))
      (node (ref RV1) (pin 3)))
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472
    (net (code 3) (name "Net-(P2-Pad1)")
      (node (ref RV1) (pin 1))
      (node (ref RV1) (pin 2))
      (node (ref P2) (pin 1)))
    (net (code 4) (name "Net-(R8-Pad1)")
      (node (ref U2) (pin 2))
      (node (ref R8) (pin 1)))
    (net (code 5) (name +8V)
      (node (ref U3) (pin 7))
      (node (ref R16) (pin 1))
      (node (ref U2) (pin 8))
      (node (ref C11) (pin 1))
      (node (ref U1) (pin 7))
      (node (ref R6) (pin 1))
      (node (ref C3) (pin 2))
      (node (ref R15) (pin 1))
      (node (ref C6) (pin 2)))
    (net (code 6) (name "Net-(C2-Pad2)")
473
      (node (ref R5) (pin 2))
474 475 476 477 478 479 480 481 482 483 484 485 486
      (node (ref U1) (pin 2))
      (node (ref R4) (pin 1))
      (node (ref C2) (pin 2)))
    (net (code 7) (name "Net-(C1-Pad1)")
      (node (ref U1) (pin 3))
      (node (ref R3) (pin 1))
      (node (ref C1) (pin 1)))
    (net (code 8) (name "Net-(C9-Pad1)")
      (node (ref U3) (pin 2))
      (node (ref C9) (pin 1))
      (node (ref R13) (pin 1))
      (node (ref R12) (pin 1)))
    (net (code 9) (name "Net-(C7-Pad2)")
487
      (node (ref R11) (pin 2))
488
      (node (ref U3) (pin 3))
489 490
      (node (ref R10) (pin 1))
      (node (ref C7) (pin 2)))
491 492 493
    (net (code 10) (name "Net-(U3-Pad8)")
      (node (ref U3) (pin 8)))
    (net (code 12) (name "Net-(U2-Pad7)")
494
      (node (ref U2) (pin 7)))
495
    (net (code 13) (name GND)
496
      (node (ref P2) (pin 2))
497 498
      (node (ref D4) (pin 2))
      (node (ref P3) (pin 2))
499 500
      (node (ref C7) (pin 1))
      (node (ref R11) (pin 1))
501
      (node (ref C8) (pin 1))
502
      (node (ref C5) (pin 1))
503
      (node (ref R7) (pin 2))
504
      (node (ref C6) (pin 1))
505 506 507 508 509 510
      (node (ref C3) (pin 1))
      (node (ref C1) (pin 2))
      (node (ref R1) (pin 2))
      (node (ref P1) (pin 2))
      (node (ref D2) (pin 2))
      (node (ref C4) (pin 1))
511
      (node (ref R4) (pin 2))
512 513
      (node (ref C11) (pin 2))
      (node (ref C10) (pin 1))
514
      (node (ref U2) (pin 5))
515
      (node (ref U2) (pin 6))
516
      (node (ref P4) (pin 1)))
517 518 519 520 521 522 523 524 525 526 527 528 529 530
    (net (code 15) (name OUT2)
      (node (ref U3) (pin 6))
      (node (ref C9) (pin 2))
      (node (ref R8) (pin 2))
      (node (ref R13) (pin 2))
      (node (ref R14) (pin 2)))
    (net (code 16) (name "Net-(U3-Pad5)")
      (node (ref U3) (pin 5)))
    (net (code 17) (name "Net-(U3-Pad1)")
      (node (ref U3) (pin 1)))
    (net (code 18) (name "Net-(P4-Pad3)")
      (node (ref R16) (pin 2))
      (node (ref P4) (pin 3)))
    (net (code 19) (name "Net-(P4-Pad2)")
531 532
      (node (ref P4) (pin 2))
      (node (ref R17) (pin 2)))
533 534 535
    (net (code 20) (name "Net-(D5-Pad2)")
      (node (ref D5) (pin 2))
      (node (ref R15) (pin 2)))
536 537
    (net (code 21) (name "Net-(D3-Pad1)")
      (node (ref D3) (pin 1))
538
      (node (ref U2) (pin 1))
539
      (node (ref D5) (pin 1)))
540 541 542 543 544
    (net (code 22) (name "Net-(D3-Pad2)")
      (node (ref R9) (pin 1))
      (node (ref D3) (pin 2)))
    (net (code 23) (name "Net-(R6-Pad2)")
      (node (ref R7) (pin 1))
545 546
      (node (ref U2) (pin 3))
      (node (ref R9) (pin 2))
547 548
      (node (ref R6) (pin 2)))
    (net (code 24) (name -8V)
549 550
      (node (ref U2) (pin 4))
      (node (ref U3) (pin 4))
551
      (node (ref C5) (pin 2))
552
      (node (ref C4) (pin 2))
553 554 555 556 557 558 559 560
      (node (ref U1) (pin 4))
      (node (ref C10) (pin 2))
      (node (ref R17) (pin 1))
      (node (ref C8) (pin 2)))
    (net (code 25) (name "Net-(D1-Pad1)")
      (node (ref D1) (pin 1))
      (node (ref D2) (pin 1)))
    (net (code 26) (name OUT1)
561 562 563 564
      (node (ref R10) (pin 2))
      (node (ref C2) (pin 1))
      (node (ref R5) (pin 1))
      (node (ref U1) (pin 6)))
565
    (net (code 27) (name "Net-(U1-Pad1)")
566
      (node (ref U1) (pin 1)))
567
    (net (code 28) (name "Net-(U1-Pad8)")
568
      (node (ref U1) (pin 8)))
569 570 571 572 573 574 575 576 577 578
    (net (code 29) (name "Net-(U1-Pad5)")
      (node (ref U1) (pin 5)))
    (net (code 30) (name "Net-(P1-Pad1)")
      (node (ref R1) (pin 1))
      (node (ref P1) (pin 1))
      (node (ref R2) (pin 2)))
    (net (code 31) (name "Net-(D1-Pad2)")
      (node (ref R2) (pin 1))
      (node (ref R3) (pin 2))
      (node (ref D1) (pin 2)))))