Part list for Mk2.7-s DC-DC power supply
CAD
Component Supplier Part # Qty Supplier Supp Pt # Cost (UK) Manufacturer Link Notes
5A STEPDOWN PWM DC-DC REGULATOR (5.0V) MAX787CCK 2 Maxim Free sample Maxim http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1271 *only 1 required for 3.3V supply 5V/3.3V/3V 5A step-down, PWM, switch-mode DC-DC Regulators
5A STEPDOWN PWM DC-DC REGULATOR (3.3V) MAX788CCK 1 Maxim Free sample Maxim http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1271 *only required for 3.3V supply 5V/3.3V/3V 5A step-down, PWM, switch-mode DC-DC Regulators
Simple Switcher 5A Flyback Regulator LM2587-12T 1 National Semiconductor Free sample National Semiconductor http://www.national.com/pf/LM/LM2587.html
Flyback Regulator Transformer T6 Q4339-B 1 Coilcraft Free sample Coilcraft http://www.coilcraft.com/q4339.html
INDUCTOR, 10uH "Power Choke" PCV-0-103-05 3 Coilcraft Free sample Coilcraft http://www.coilcraft.com
INDUCTOR,BOBBIN 47UH 8.5A   1447385  3 Farnell UK 482-572 2.37 Newport Power Devices http://www.farnell.com $16.30
IC-VOLTAGE REGULATOR -5V   MC79L05ACP  1 Farnell UK 701-932 0.32 various http://www.farnell.com $0.73
IC CMOS 4049 ? 1 Farnell UK ? 0.36 various http://www.farnell.com $0.83
DIODE,SCHOTTKY 7.5A   MBR745 3 Farnell UK 878-261 1.04 Motorola http://www.farnell.com $7.15
DIODE,SCHOTTKY 3A 40V   MBR340 1 Farnell UK 638-146 0.54 Motorola http://www.farnell.com $1.24
DIODE,ULTRA FAST 1A 200V   MUR120RL 1 Farnell UK 930-994 0.28 Motorola http://www.farnell.com $0.64
DIODE,TRANSIENT SUPPRESSION   SA28A 1 Farnell UK 167-356 0.52 Farichild http://www.farnell.com $1.19
DIODE,SCHOTTKY 1A   1N5819 1 Farnell UK 573-115 0.27 Multicomp http://www.farnell.com $0.62
DIODE,1A 100V   1N4002 2 Farnell UK 365-142 0.06 Philips http://www.farnell.com Any general >0.5A diode will work $0.28
RELAY,PCB SPCO 12V G2R-1 12DC+  1 Farnell UK 179-325 2.32 Omron http://www.farnell.com $5.32
CAPACITOR,1800UF 35V (Electrolytic) EEUFC1V182 2 Farnell UK 303-6443 0.92 Panasonic http://www.farnell.com (FC series) Must be low ESR type $4.22
CAPACITOR,470UF 25V  (Electrolytic) EEUFC1E471  6 Farnell UK 303-6273 0.30 Panasonic http://www.farnell.com (FC series) Must be low ESR type $4.13
CAPACITOR,330UF 35V  (Electrolytic) EEUFC1V331  4 Farnell UK 303-6406 0.30 Panasonic http://www.farnell.com (FC series) Must be low ESR type $2.75
CAPACITOR,220UF 25V  (Electrolytic) EEUFC1E221 1 Farnell UK 303-6250 0.19 Panasonic http://www.farnell.com (FC series) $0.44
CAPACITOR,10UF 25V  (Electrolytic) TAP106M025CCS 1 Farnell UK 643-786 0.39 various http://www.farnell.com $0.89
CAPACITOR,0.68UF 35V  (Tantalium Cap) TAP684M035CCS 1 Farnell UK 643-877 0.17 AVX http://www.farnell.com $0.39
CAPACITOR 100NF 63V  (Polyester Cap) BH014D0104K 1 Farnell UK 301-8660 0.12 AVX http://www.farnell.com Any 100nF capacitor should work $0.28
CAPACITOR 10000PF  (Ceramic Cap) MCDR25103X7RK0050 3 Farnell UK 750-890 0.11 Multicomp http://www.farnell.com $0.76
RESISTOR, 47k 1/4W 1 Farnell UK 543-780 0.023 http://www.farnell.com $0.05
RESISTOR, 2.7k 1/4W 3 Farnell UK ? 0.023 http://www.farnell.com red, violet, red $0.16
RESISTOR, 3k 1/4W 1 Farnell UK 543-494 0.023 http://www.farnell.com orange, black, red $0.05
RESISTOR, 470R 1/2W 1 Farnell UK 544-516 0.04 http://www.farnell.com yellow, violet, brown $0.08
TO220 heatsink electrical insulators MK3306/S 2 Farnell UK 522-636 0.11 $0.50
3mm Led 1 Use any colour you like
PCB 1 Make your own yourself
Heatsink 1 Make your own yourself cut and bend aluminium to fit
TOTAL $48.98
MBR745 diodes must be electrically isolated
Connection to battery must be 10A fuse and holder 1 fused
Cables and connectors fit as required