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Lithium-ion Battery Recycling Made Easy

meaning: without a microcontroller

Lithium-ion Battery Recycling Made Easy
It can be quite tricky to reuse Lithium-ion batteries from discarded equipment since these cells are often charged inside the equipment, meaning that there won't be a separate charger that can also be reused. Luckily, it turns out to be fairly easy to build a charger for used (or new) Li-ion cells.
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Component list
R1,R2,R5 = 4.7kOhm
R3,R4 = 560kOhm
R6 = 3.3kOhm
R7 = 10kOhm
R8 = 10kOhm (only if NTC in battery)
R9 = 5.6kOhm
(default: SMD0603)
C1,C3 = 4.7µF (SMD0805)
C2 = 100nF
C4 = 68nF
D1 = LED, green, 3mm
D2 = LED, red, 3mm
D3 = LED. yellow, 3mm
IC1 = MAX8677AETG+ (24-pin TQFN)
USB1 = mini USB connector, PCB mount, SMD, (e.g. Molex 67803-8020, RS Components # 720-6618)
FS1 = fuse, SMD, rating dependent on battery (e.g. LittleFuse nanofuse 3 AT, Farnell/Newark # 1596930RL)
PCB artwork # 130117-1
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