BUTCube/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