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Petr Malanik f284eb4d04
diagrams: create proposal for PCb stackup 		3 years ago
Solar_module_XY Solar_module_XY: add page-layout, update page-layout of pcb and schema 3 years ago
Solar_module_Z Solar_module_Z: add via stitching 3 years ago
diagrams diagrams: create proposal for PCb stackup 3 years ago
papers project: folder structure update, resources anf paper folders 3 years ago
resources project: folder structure update, resources anf paper folders 3 years ago
.gitignore Solar_module_XY: add via stitching 3 years ago
README.md Notes: add photodiodes comparison 4 years ago

README.md

BUTCube

Solar cells

Digi-key filter: https://www.digikey.nl/products/en?FV=-5|23585

Calculations for space are calculated with 1 mm space between panels In center of panel there should be attitude determination module with minimal size od 25mm x 25mm All calculation are only for one side of satelite

SM141K04L

  • Link: https://www.digikey.nl/short/fvpwbf4h
  • Panel count: 10 (2S 5P)
  • Maximal power: 1.23 W
  • Voltage: 4.46 V
  • Dimensions: 29 x 23 mm (89 x 95 mm)
  • Weight: 3g (30g)
  • Configuration: 4 x 3
  • Price (for 1 side): 28 € (750 CZK)

KXOB25-05X3F

  • Link: https://www.digikey.nl/short/hdrrmtq3
  • Panel count: 32 (4S 8P)
  • Maximal power: 0.98 W
  • Voltage: 6.68 V
  • Dimensions: 23 x 8 mm (95 x 89 mm)
  • Weight: 0.5g (17g)
  • Configuration: 10 x 4
  • Price (for 1 side): 47 € (1229 CZK)
    • Reflow solderable

SM141K06LV

  • Link: https://www.digikey.nl/short/d80rrj7t
  • Panel count: 6 (2S 3P)
  • Maximal power: 1.10 W
  • Voltage: 6.7 V
  • Dimensions: 45 x 22 mm (91 x 91 mm)
  • Weight: 3g (18g)
  • Configuration: 2V 2H 2V
  • Price (for 1 side): 27 € (720 CZK)

SM141K04LV

  • Link: https://www.digikey.cz/short/r589mmbj
  • Panel count: 8 (2S 4P)
  • Maximal power: 0.98 W
  • Voltage: 5.52 V
  • Dimensions: 45 x 15 mm (81 x 95 mm)
  • Weight: 2.5g (20g)
  • Configuration: 2V 4H 2V
  • Price (for 1 side): 28 € (750 CZK)

Solar module

  • PCB with size cca 96x96 mm
  • In center of module is hole for another module (40x40 mm without corners)
  • Integrated components: Optodiode, temperature measuring IC

Sensors

  • Temperature sensor: AT30TS74
  • Photo diode:
    • VEMD5510C - 550nm (450-750) - visible
    • VEMD5060X - 800nm (500-1000) - visible + IR
    • VEMD5160X - 850nm (750-950) - IR
  • ADC for photodiode: ADS7142

Other parts:

  • LTC4415 - Dual ideal diode with ORing
  • MAX16171
  • BQ25798 - solar battery charger with dual-input selector and MPPT, I2C, https://www.ti.com/product/BQ25798
  • BAT54W-G - Low drop shottky diode, solar blocking diode