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# BUTCube
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# Solar cells
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Digi-key filter: https://www.digikey.nl/products/en?FV=-5|23585
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Calculations for space are calculated with 1 mm space between panels
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In center of panel there should be attitude determination module with minimal size od 25mm x 25mm
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All calculation are only for one side of satelite
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#### SM141K04L
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- Link: https://www.digikey.nl/short/fvpwbf4h
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- Panel count: 10 (2S 5P)
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- Maximal power: 1.23 W
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- Voltage: 4.46 V
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- Dimensions: 29 x 23 mm (89 x 95 mm)
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- Weight: 3g (30g)
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- Configuration: 4 x 3
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- Price (for 1 side): 28 € (750 CZK)
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#### KXOB25-05X3F
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- Link: https://www.digikey.nl/short/hdrrmtq3
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- Panel count: 32 (4S 8P)
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- Maximal power: 0.98 W
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- Voltage: 6.68 V
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- Dimensions: 23 x 8 mm (95 x 89 mm)
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- Weight: 0.5g (17g)
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- Configuration: 10 x 4
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- Price (for 1 side): 47 € (1229 CZK)
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- + Reflow solderable
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#### SM141K06LV
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- Link: https://www.digikey.nl/short/d80rrj7t
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- Panel count: 6 (2S 3P)
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- Maximal power: 1.10 W
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- Voltage: 6.7 V
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- Dimensions: 45 x 22 mm (91 x 91 mm)
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- Weight: 3g (18g)
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- Configuration: 2V 2H 2V
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- Price (for 1 side): 27 € (720 CZK)
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#### SM141K04LV
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- Link: https://www.digikey.cz/short/r589mmbj
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- Panel count: 8 (2S 4P)
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- Maximal power: 0.98 W
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- Voltage: 5.52 V
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- Dimensions: 45 x 15 mm (81 x 95 mm)
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- Weight: 2.5g (20g)
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- Configuration: 2V 4H 2V
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- Price (for 1 side): 28 € (750 CZK)
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## Solar module
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- PCB with size cca 96x96 mm
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- In center of module is hole for another module (40x40 mm without corners)
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- Integrated components: Optodiode, temperature measuring IC
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## Sensors
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- Temperature sensor: AT30TS74
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- Photo diode:
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- VEMD5510C - 550nm (450-750) - visible
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- VEMD5060X - 800nm (500-1000) - visible + IR
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- VEMD5160X - 850nm (750-950) - IR
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- ADC for photodiode: ADS7142
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# Other parts:
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- LTC4415 - Dual ideal diode with ORing
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- MAX16171
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- BQ25798 - solar battery charger with dual-input selector and MPPT, I2C, https://www.ti.com/product/BQ25798
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- BAT54W-G - Low drop shottky diode, solar blocking diode
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