Adapter DC2DC_A4 components and part list.

IC1 - DCDC converter MC34063A (DIP-8); optional: IC Socket DIL-8 IC2 - Adjustable voltage regulator LM317T (TO-220) V1, V4 - BC640 V2, V3 - BC547 D1 - Schottky 1N5819 D2 - 1N4148 or KD522 R1 - 0.5 Ohm R2 - 180 R3 - 1k5 R4 - 16k R5 - Trimmer potentiometer, horizontal. 470 R6 - 10k R7 - 1k2 R8, R9, R10, R18 - 2k2 R11 - 4k3 R12 - 750 Ohm +-1% R13 - 150 Ohm +-1% R14 - 100 Ohm +-1% R15 - 3k R16 - 5k6 R17 - 470 R19 - 15k R20 - 100k C2 - 240p C3 - 100.0mkFx35V C4, C6 - 330n L1 - Drossel 100mkH (Axial high current choke HM50 Mfr.BI Technologies , stock Nr 58-085-71 www..elfa.se ) BU1 - Angled socket connector 1x5, division 2.54 BU2 - Straight pin-header 1x2, division 2.54 M, N - Straight pin-header 1x4, division 2.54 / Jumper, division 2.54 (2pcs) P - Straight pin-header 1x2, division 2.54 / Jumper, division 2.54 R, S, T - Straight pin-header 1x5, division 2.54 / Jumper, division 2.54 (2pcs)