Variable DC Powersupply

During the Mech 14 class at Sierra College I designed and Fabricated a variable DC Power Supply

 

 

Scott Boughton
Mech-14 Power Supply Bill of Materials
November 30, 2012
Item Name QTY Unit Cost Extended Cost Source Model/Item #
PC Board 1 9.00 9.00
Transformer, 120 VAC to 24 VAC 1 27.84 27.84 sears.com T24130D
Voltage Panel Meter (0-35v) 1 16.99 16.99 aliexpress.com 207381
Power Switch 125v 1 1.08 1.08 digikey.com EG4746-ND
Breaker, 1/4 amp 1 5.90 5.90 digikey.com PB180-ND
Potentiometer, 5k Ohm 1 1.79 1.79 parts-express.com 5K Ohm Pot
Potentiometer Knob 1 0.50 0.50 futurlec.com KNOB13
Banna Jack, Red 1 0.66 0.66 newark.com 108-0902-001
Banna Jack, Green 1 0.72 0.72 newark.com 108-0904-001
Banna Jack, Black 1 0.66 0.66 newark.com 108-0903-001
IEC Connector 1 6.55 6.55 digikey.com 603-1155-ND
IEC Cable 1 8.40 8.40 infinitecables.com PW-105C-08
Plastic LED Lens 1 0.32 0.32 superbrightleds.com LM-C5-LP
Aluminum Chassis Bottom 1 2.76 2.76  www.metalsdepot.com  S3040
Aluminum Chassis Top 1 2.06 2.06  www.metalsdepot.com  S3040
#6-32 machine screw, 3/4″ 2 0.06 0.12 boltdepot.com 1338
#6-32 nuts 2 0.08 0.16 boltdepot.com 2537
Rubber Feet 4 0.75 3.00 crowriver.com RF008H
#4 sheet metal screw, 1/4″ 8 0.05 0.40 boltdepot.com 2248
#4-40 machine screw, 1/2″ 8 0.05 0.40 boltdepot.com 3712
#4-40 nuts 8 0.05 0.40 boltdepot.com 2642
Grounding Lug 1 0.61 0.61 satpro.tv PVGLS
Powder Coat, White 1 4.99 4.99 harborfreight.com 93307
Powder Coat, Blue 1 9.99 9.99 eastwood.com 100 10291
LM317 Voltage regulator 1 0.54 0.54 digikey.com 296-17221-1-ND
LM7805 Voltage regulator 3 0.67 2.01 digikey.com LM7805ACT-ND
Blue LED 1 0.72 0.72 superbrightleds.com RL5-B4630
Bridge Rectifier, 120v, 1A 1 0.52 0.52 digikey.com KBP202GDI-ND
1N4001 Diodes 2 0.43 0.86 digikey.com 1N4001-E3
Zener Diode, 5v @ 1W 3 0.39 1.17 parts-express.com 5.1V-1W Zener Diode
2200uF Electrolytic Capacitor 1 2.24 2.24 parts-express.com 020-1260
10uF Electrolytic Capacitor 2 0.09 0.18 parts-express.com 020-1212
2.2k Ohm, 1/4W resistor 1 0.07 0.07 digikey.com CFR-25JR-52-2K2
0.1uF Capacitor 1 0.09 0.09 parts-express.com 020-1620
180 Ohm, 1/4W resistor 1 0.08 0.08 digikey.com CF14JT180R
1k Ohm, 1W resistor 1 0.11 0.11 digikey.com 1-1623925-5
Dual Pannel Mount A USB Port 1 11.45 11.45 sgwelectronics.com 62-00187-01
Mica Insulator and Mounting Kit 4 1.56 6.24 newark.com 02M5407
1/4″ Plastic Spacers 4 0.14 0.56 digikey.com 9908-250
Total Extended Cost     132.13

What do you think?