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Tinkerbug-Robotics
Model rocket flight computer, ground station, iOS app, and simulation
| Reference | Value | Description |
|---|---|---|
| Q1-Q3 | FS8205A | |
| U1 | GD25Q128ESIG | |
| U3 | ESP32-S3RH2 | |
| U5 | BQ21040DBVR | 1-cell, 0.8-A Li-ion and Li-polymer battery charger |
| U9 | TPS63020DSJR | High Efficiency Single Inductor Buck-Boost Converter with 4A Switch 14-VSON -40 to 85 |
| U14 | DW01A | |
| U15 | 479480001 |
| U16 | E220-900MM22S |
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| U22 | TPS22918DBVR |
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| BT2 | BH-18650-A5BJ001-2D | Battery Holder; THM; For Cell 18650 | MYOUNG BH-18650-A5BJ001-2D | LCSC C19184083. Replaces Keystone 1043P; unlike it this holder is NOT polarized, so nothing mechanically prevents a reversed cell. Positive is the pin-1 / silk-plus end. |
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| C1,C9,C12,C14,C16,C17,C22,C23,C29,C30,C33 | 100 nF |
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| C2,C4 | 22 pF |
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| C3,C6 | 12 pF |
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| C8,C13,C18,C27,C28 | 1 uF |
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| C10,C15,C19 | 10 uF |
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| C11,C21 | 10 nF |
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| C20,C42,C58-C62 | 22 uF |
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| C88 | 2.2 nF | Unpolarized capacitor |
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| CR1 | SP0503BAHTG |
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| D6 | Green | Light emitting diode |
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| D9 | Blue | Light emitting diode |
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| J2 | TYPE-C-31-M-12 |
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| J8 | CON-SMA-EDGE-S |
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| L2 | 24 nH | Inductor, small symbol |
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| L3 | 2 nH | Inductor, small symbol |
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| L4 | 4.3 nH | Inductor, small symbol |
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| L9 | VLS3012CX-2R2M-1 | Inductor Power Shielded Wirewound 2.2uH 20% 1MHz Ferrite 2.55A 0.074Ohm DCR 1212 T/R |
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| R1,R2 | 10 k |
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| R3,R4 | 22 |
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| R7 | 100 k |
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| R13,R44,R46 | 1 M | Resistor, US symbol |
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| R14,R15 | 5.11 k |
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| R16 | 180 k | Resistor, US symbol |
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| R41,R54 | 150 | Resistor, US symbol |
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| R52 | 680 |
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| R53 | 210 k |
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| R55 | 100 |
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| R57 | 2 k |
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| S1 | PB400EEQR1BLK |
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| S3 | R-667995 | Tactile switch, SPST-NO, top actuated, SMD, 0.02 A 15 VDC, 3.0 x 2.0 mm, 163 gf, 500k cycles, IPX8 |
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| TH1 | Thermistor 10k NTC B3435 | Battery temperature sense for the BQ21040 TS pin - 10 k NTC at 25 C, B25/85 = 3435 K, 0603. R53 (210 k, TS to GND) is TI's TTDM-defeat resistor. BOARD-MOUNTED, not on the cell: placed at the far end of the board from the charger, buck and ESP32-S3 so board self-heating biases the reading as little as possible. Consequence: the JEITA window tracks PCB temperature, so a cold cell in a self-heated board can still be charged - see the board README. |
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| Y1 | ABS07-32.768KHZ-T |
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| Y2 | ECS-400-10-37B2-CKY-TR |
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