Component List

Resistors

R1, R3, R5 = 22 kΩ

R2 = Not used

R4 = 75 kΩ

R6 = 0.1 Ω

R7 = 2.2 kΩ

R8, R19 = 10 kΩ NTC

R9, R29 = 0.01 Ω

R10, R11, R30, R31 = 10 Ω *

R12 = Not used 

R13, R24, R25, R26 = 10 kΩ

R14, R15 = 2.7 kΩ

R16 = 33 kΩ

R17 = 4.7 kΩ

R18 = 100 kΩ Trimmer, multiturn

R20 = 220 kΩ

R21 = 1 kΩ

R22 = 10 kΩ Trimmer, multiturn

R23 = 5.6 kΩ

R27 = 1.2 kΩ

R28 = Not used

Capacitors

C1 = 6.8 nF

C2 = 47 pF

C3, C6, C14, = 22 µF, 25 V

C4, C26 = 47 µF, 25 V

C5 = 4.7 µF, 25 V

C7 = 100 µF, 25 V

C8…C11 = 100 nF

C12, C20 = 220 µF, 25 V, electrolytic

C13 = 470 nF

C15, C17 = 470 µF, 25 V

C18, C23, C30 = 1 µF, 25 V

C19 = Not used

C25 = 2.2 µF

C16, C21, C22, C24, C27, C31 = 100 nF

C28, C29 = Not used

Inductors

L1 = 4.7 µH inductor, see [4]

L2 = Not used

L3 = Not used

L4 = 15 µH inductor, 1 A rated

Semiconductors

U1 = LTC1871

U2 = AP7381-33

U3 = LTC4002

U4 = PIC12F1840

IC1, IC4 = INA219

IC2 = SI4435 or IRF9393

IC3 = LP2992

Q1 = IPD031N03L

Q2…Q6 = 2N2222

Q5 = Not used

D1, D2, D3 = SSB44 Schottky

D4 = SBR20M150

D5 = MBR330 Schottky

D6 = LED red (PC power)

D7 = LED red (Charge)

D8 = LED red (DC/DC Conv. on)

D9 = 1N4001

D10 = Zener diode, 12 V 0.5 W

Miscellaneous

2 x 18650 3.7 V cell, LG type LGABHG21865

1 x 2-pole screw terminal block (PC output)

1 x barrel-type conn., female, PCB type or

1 x 2-pole screw-terminal block (AlimPC)

2 x heat sink (see text)

1 x 0.91" OLED Display, see [6]

1 x fan, 40 x 40 mm, 5 V DC