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STD 7.4V Lithium charger
Mode: Editors' pick
- 1
Update time：
2018-09-11 10:26:48
Creation time：
2018-07-24 12:15:46
Description
This charger uses two LM317 to make up a CC and CV mode which is toggled by an Op-Amp comparator.
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity | Mounted | |
|---|---|---|---|---|---|---|
| 1 | LM317BTG | U1,U2 | TO-220(TO-220-3) | 2 | Yes | C14502 |
| 2 | spdt 12v relay | U5 | 5 PIN SPDT RELAY | 1 | Yes | |
| 3 | 1N4007 | D2,D1 | DO-41 | 2 | Yes | |
| 4 | 470R | R2,R1 | AXIAL-0.3 | 2 | Yes | |
| 5 | DC JACK | IN_+12V | DC JACK (123) | 1 | Yes | |
| 6 | LED 5MM | LED1,LED2 | LED 5MM | 2 | No | |
| 7 | 4.7R | R3,R9,R10 | AXIAL-0.3 | 3 | Yes | |
| 8 | 560R | R4 | AXIAL-0.3 | 1 | Yes | |
| 9 | 3.3k | R51 | AXIAL-0.3 | 1 | Yes | |
| 10 | Header-Female-2.54_1x2 | P1 | HDR-1X2/2.54 | 1 | Yes | C49661 |
| 11 | screw_terminal_connector | U3 | SCREW TERMINAL | 1 | Yes | |
| 12 | BC547B Tube | Q1 | TO-92(TO-92-3) | 1 | Yes | C2092 |
| 13 | 1k | R6 | AXIAL-0.3 | 1 | Yes | |
| 14 | LM358AN | U4 | LM358AN | 1 | Yes | |
| 15 | 10k | R7 | AXIAL-0.3 | 1 | Yes | |
| 16 | 22k | R8 | AXIAL-0.3 | 1 | Yes |
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