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7.4V Lithium Charger with MCU copy

2 years ago 154
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

The charger can charge 7.4V lithium battries with CC and CV mode.

Built using LM317 and Arduino, charge current 800mA (CC) and charge voltage 8.4 (CV).

Documents

Sheet_1 copy

7.4V Arduino PCB copy

BOM

ID Name Designator Footprint Quantity Mounted
1 LM317TG CONSTANT_CURRENT,CONSTANT_VOLTAGE TO-220(TO-220-3) 2 Yes C89320
2 1.5R 1W R1 10W 1 Yes
3 3.3k R3 AXIAL-0.3 1 Yes
4 560R R2 AXIAL 0.3/0.8/1.5 1 Yes
5 spdt 12v relay U5,U1 5 PIN SPDT RELAY 2 Yes
6 DC JACK IN_+12V DC JACK (123) 1 Yes
7 1N4007 D2,D1 DO-41 2 Yes
8 BC547B Tube Q1,Q2 TO-92(TO-92-3) 2 Yes C2092
9 1k R5,R4,R8 AXIAL-0.3 3 Yes
10 Battery_terminal P1 HDR-1X2/2.54 1 Yes C49661
11 1M R6,R7 AXIAL-0.3 2 Yes
12 2.2R 5W SHUNT 1W 1 Yes
13 NO U3 ARDUINO_NANO 1 Yes
14 10uf C1 CAP-D3.0XF1.5 1 Yes
15 LCD U4 LCD 1 Yes
16 10k R9 TRIMPOT 1 Yes C125022

Attachments

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