Table 5.
Bill of materials of the electronic stethoscope.
| No. | Quantity | Comment | Designator | Footprint |
|---|---|---|---|---|
| 1 | 4 | 4.7 uF | C1, C3, C7, C8 | C0603 |
| 2 | 1 | 2200 uF | C1 | CP_16X25MM |
| 3 | 2 | 100 nF | C2, C4 | C0603 |
| 4 | 1 | 0.1 u | C2 | C0805 |
| 5 | 2 | 220 uF | C3, C4 | CAP-TH_BD8.0-P3.50-D1.0-FD |
| 6 | 2 | 20 p | C5, C6 | C0603 |
| 7 | 2 | 10 UF | C9, C10 | C0603 |
| 8 | 1 | 470 nF | C11 | C0603 |
| 9 | 1 | 1 UF | C12 | C0603 |
| 10 | 1 | XH2.54*2P | CN1 | CONN-TH_2P-P2.50-XH2.54-2P |
| 11 | 1 | 1N5824 | D1 | SMA/DO-214AC |
| 12 | 1 | 33 uH | L1 | IND-SMD_L7.7-W7.3 |
| 13 | 2 | 0805G (green) | LED1, LED2 | led0805 |
| 14 | 1 | LED-0805_R | LED1 | LED0805_RED |
| 15 | 1 | MIC | MIC1 | MIC-TH_BD6.0-P2.00 |
| 16 | 2 | 1 kΩ | R1, R2 | R0603 |
| 17 | 1 | 10 k | R1 | R0805 |
| 18 | 2 | 2K2 | R3, R7 | R0603 |
| 19 | 1 | 1K2 | R4 | R0603 |
| 20 | 2 | 22 | R5, R6 | R0603 |
| 21 | 1 | 2 K | R8 | R0603 |
| 22 | 3 | 10 K | R9, R12, R13 | R0603 |
| 23 | 1 | 100 K | R10 | R0603 |
| 24 | 1 | 1 K | R11 | R0603 |
| 25 | 1 | CM108B | U1 | LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL |
| 26 | 1 | LM2596 | U2 | TO-263-5_L10.6-W9.6-P1.70-LS15.9-BR |
| 27 | 1 | NE5532N | U4 | DIP-8_L9.3-W6.4-P2.54-LS7.6-BL |
| 28 | 1 | XH2.54-WI-3P | U5 | CONN-TH_XH2.54-WI-3P |
| 29 | 1 | 8 MHZ 20 PF 10 PPM | X1 | OSC-SMD_L5.0-W3.2 |