Power Supply
 Noritsu Power Supply Board D7239M 01 $200.00 
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 GRETAG IMAGING SAN MARCO POWER SUPPLY $160.00
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 Durst CLS 1840 cable from color head to power supply for 1000w head $149.95
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 Beseler Dichro 67 Colorhead Stabilized Power Supply $49.00
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 Vivitar Power Supply Model RPS 18 117 for Darkroom Timers Equipment $27.95
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 Vivitar Power Supply and digital Time Commander $19.00
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 Beseler Dichro 67 Colorhead Stabilized Power Supply $34.99
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 Omega replacement knob for Chromegatrol timer power supply $5.00
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 New 220V Power Supply for LPL 7451 7452 and 7452L 4x5 Enlargers $973.87
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 BLUE GAS LASER POWER SUPPLY FOR POLIELETTRONICA $759.00
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 Refurbished Chromegatrol Stabilized Power Supply Timer $596.07
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 New LPL Voltage Stabilized Power Supply for Saunders LPL 4x5 Enlargers $587.21
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 GREEN GAS LASER POWER SUPPLY FOR POLIELETTRONICA $499.00
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 RED GAS LASER POWER SUPPLY FOR POLIELETTRONICA $359.00
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 Late Style Power Supply for Saunders LPL 4x5 Enlargers Refurbished w Warranty $325.00
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 I038214 00 POWER SUPPLY NY650POW 2P NORITSU 2301 $300.00
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 I038214 00 POWER SUPPLY NY650POW 2P NORITSU 2301 $300.00
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 New 220V Power Supply for LPL 6700 and 7700 series Enlargers $288.73
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 New 120V Power Supply for LPL 7700 and Saunders LPL 670XL Enlargers $288.73
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 Saunders LPL 4x5 Enlarger Power Supply Repair w Warranty $245.00
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 Omega Chromegatrol power supply and timer $125.00
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 NORITSU ZT170 5FF 522 POWER SUPPLY UNIT NEW BOXED $107.46
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 Saunders LPL Power Supply $75.00
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 Vivitar Exposure Time Commmander and Power Supply $45.00
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 CHROMEGA B DICHROIC POWER SUPPLY $24.91
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 Kindle US Power Adapter (Not included with Kindle or Kindle Touch) List Price: Sale Price: $14.99 You save: $5.00 (25%)  Eligible for free shipping!Availability: Usually ships in 24 hours Description* The United States Kindle power adapter * Approved charger for Kindle, Kindle Touch, Kindle Keyboard, and Kindle DX * Fully charges Kindle, Kindle Touch, Kindle Keyboard, or Kindle DX in 4 hours or less * See Kindle User's Guide for instructions and important safety information  |
 USB Sync and Charging Cable Compatible with Apple iPhone (White) List Price: Sale Price: $0.01 You save: $24.98 (100%) Eligible for free shipping!Availability: Usually ships in 24 hours DescriptionBrand New!!! |
 USB Wall Adapter Charger with USB to Dock Connector cable compatible with iPhone 3G, 3GS, 4 List Price: Sale Price: $0.01 You save: $19.98 (100%) Eligible for free shipping!Availability: Usually ships in 24 hours DescriptionSpecifications : USB Wall Charger Adapter USB Power Adapter Charger For iPhone 4G .Featuring a new, ultra compact design, this power adapter offers fast, efficient charging at home, in the office, or on the go... |
 Stereo Headset /w Microphone for Apple iPhone 3G (White) List Price: Sale Price: $0.01 You save: $9.79 (100%) Eligible for free shipping!Availability: Usually ships in 24 hours DescriptionLightweight and comfortable, this Apple iPhone 3G Hands-Free Stereo Headset enables you to carry on conversations while you continue to do other things including listening to your favorite music. Modeled after the acclaimed new Apple Earphones, the iPhone Stereo Headset provide superior comfort, fit, and sound quality... |
 Motorola Vehicle Power Adapter micro-USB Rapid Rate Charger List Price: Sale Price: $1.49 You save: $28.50 (95%) Eligible for free shipping!Availability: Usually ships in 1-2 business days DescriptionThe Motorola Micro USB high-performance car charger is a requirement for anyone who is on the road. Through your vehicle power adapter you can talk and charge at the same time so your cell phone will stay charged while you are on the go... |
 5 in 1 Card Reader for iPad List Price: Sale Price: $0.01 You save: $0.15 (94%) Eligible for free shipping!Availability: Usually ships in 1-2 business days DescriptionUp for sale is a new gen iPAD/iPAD2 connection kit featuring image/photo transfer via SD,MicroSD reader or USB cable of your camera. In addition,it supports standard keyboard input as well as USB flash drive to iPAD/iPAD2... |
 USB Sync and Charging Cable Compatible with Apple iPhone, iPod, iPad List Price: Sale Price: $0.01 You save: $14.98 (100%) Eligible for free shipping!Availability: Usually ships in 1-2 business days DescriptionUse the Dock Connector to USB Cable to charge and sync your iPhone or iPod with your Mac or Windows PC. Features : This USB 2.0 cable connects your iPhone or iPod - directly or through a Dock - to your computer's USB port for efficient syncing and charging or to the Apple USB Power Adapter for convenient charging from a wall outlet... |
 Kindle Fire Charger / AC Adapter List Price: Sale Price: $19.99 You save: $5.00 (20%) Eligible for free shipping!Availability: Usually ships in 24 hours DescriptionThis is the Power Adapter for the Kindle Fire.Compatible Model(s): Amazon Kindle Fire 7.0" 1GHz ARM Cortex A-9 (D01400) - Late 2011 |
 White USB Cable Power Adapter (Wall Charger Adaptor with fixed blades) for Apple iPod, iPhone, iPhone 3G, iPhone 4,Touch, Shuffle, Nano, Classic List Price: Sale Price: $0.01 You save: $29.98 (100%) Eligible for free shipping!Availability: Usually ships in 24 hours DescriptionBattery Charger power supply for Apple iPod/ iPhone/ iPhone 3G /iPhone 4 all models!. Apple A1265 battery charger is designed built specifically for your Apple iPod/ iPhone/ iPhone 3G / iPhone 4 all models... |
 Plantronics M50 - Bluetooth Headset - Retail Packaging - Black List Price: Sale Price: $26.24 You save: $23.75 (48%) Eligible for free shipping!Availability: Usually ships in 1-2 business days DescriptionHear it all--music, calls, and more--with the Plantronics M50 Bluetooth headset, which streams audio from your smartphone and makes every call worry-free. It features an extended battery life, whispered talk-time alerts, and noise reduction features... |
How to set up a power supply with 2 different currents?
Suppose I have an electronic device that requires 2 different currents through 3 different circuits. One is a 12V 0.8A, the other 2 are 3.3V 2.7A.
I want to power this with a single battery pack made of multiple D Cell Alkaline Batteries.
How would you design the Power supply?
The nominal output voltage of single-use D cells is 1.5 volts. I assume the loads need not have a common ground. The current capacity is about 7.8 ampere-hr, so you need to try to equalize the current drawn from the individual batteries.
So, you need 8 of them in series for the 12 volt supply. The string can then be tapped across three of the batteries for one supply, and three other batteries for the other supply, with a 0.22 ohm resistor common to the return paths of the two supplies, connected to the middle of the four batteries, to reduce each voltage to 3.3 volts.
Later: Hi,
My first idea was wrong.
The easiest way to explain how to do it right is to move circuit two and its associated resistor In your schematic one battery to the right. Then, circuit one and two are not connected to one another. Then, replace both 0.22 ohm resistors with 0.44 ohm resistors. That should be okay.
How to install a Power Supply
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