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Dual Linear PSU for Model Aircraft

Dual Linear PSU for Model Aircraft
In 'full-size' aviation, vital aircraft systems are doubled, or even tripled, up in order to guarantee critical event rates that are sometimes less than one in a billion flying hours. Why not adapt these principles to radio-controlled model aircraft?
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors
All 0.25 W 1%, SMD 0805
R1 = 220kOhm
R2 = 1kOhm8
R3, R7 = 470Ohm
R4 = 270Ohm
R5,R6 = see text
P1 = 2kOhm, 5mm preset, square, SMD (Farnell # 1557936)
Capacitors
C1, C4 = 100nF 50V ceramic, X7R, SMD 0805
C2, C5 = 47?F 16V tantalum, case D (Farnell # 498762)
C3 = 100?F 25V electrolytic, radial, lead pitch 0.1" (2.54mm)
Semiconductors
D1 = 12CWQ03, Schottky diode 2x6A, 30V, DPAK (Farnell #9101160)
IC1, IC2 = LT1764EQ, LDO regulator, D2PAK (Farnell # 1273623)
Miscellaneous
K1–K16,K18,K21,K22 = 3-way pinheader, pitch 0.1" (2.54 mm)
K17 = 15-way sub-D socket, vertical mounting on PCB (Farnell # 1106813)
K19,K20 = polarized connector (Deans Micro Plug)
K23 = 8-way polarized connector, vertical, lead pitch 0.1" (2.54mm)
PCB, ref. 081064-1

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