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12 VDC to 9 VDC

2 years ago 188
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Description

Adapter to convert 12 VDC to 9 VDC using LM317 voltage regulator

Documents

Schematic

PCB

BOM

ID Name Designator Footprint Quantity
1 LM317T-DG U1 TO-220(TO-220-3) 1
2 0.1uf C1,C4 RAD-0.1 2
3 4.7 k R1 AXIAL-0.3 1
4 100 R2 AXIAL-0.3 1
5 680 R3,R8 AXIAL-0.3 2
6 3.3k R4 AXIAL-0.3 1
7 Yellow LED1,LED2 LED-3MM/2.54 2
8 Input P1 WJ2EDGVC-5.08-2P 1
9 Output P2 WJ2EDGVC-5.08-2P 1
10 100k R5 RES-ADJ_3296X 1
11 Heatsink-1 KK1 531XXXXXXXX 1
12 1N4007 D1,D2,D3 DO-41 3
13 33k R6 AXIAL-0.3 1
14 2N3904 Q1 TO-92(TO-92-3) 1
15 470 R7 AXIAL-0.3 1
16 from MCU to Shutdown P3 HDR-1X1/2.54 1
17 Barrel Connector U2 BARREL CONNECTOR 1
18 10uF C5,C2-THT CAP-D10.0XF5.0 2
19 1u C3 CAP-D6.3XH5.5 1
20 10u C6-SMD CAP-D6.3XH5.5 1
21 1k R9 AXIAL-0.3 1

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