Quantity   Component name
1 × 100nF ceramics capacitor 0603 or 0805 (47nF to 10µF should work, too)
1 × 10µF ceramics capacitor 0603 or 0805 (4.7µF*47R should work, too)
1 × 47R 0805, replaces LED "IN" (33R*10µF should work, too)
1 × 1K8 0805, replaces LED "OUT" (any value from 220R to 4k7 should work)
1 × some wire
1 × DCDC Module (e.g. AliExpress "1pcs LM2596 DC 4.0~40 LED Voltmeter")