Archive for June, 2011
Switch Voltage
June 30th, 2011 | 
Author: Switch Voltage deals on Amazon:
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Proctor Silex K2070Y 1 Liter Electric Kettle $11.39 Housed in a smooth, modern-looking design, this 1000-watt electric kettle rapidly boils up to 1 quart of water for coffee, tea, instant soups, and more. The unit features a detachable cord and a nonspill spout for graceful serving, plus a generous handle with a secure grip. Its immersed heating element provides a rapid and quiet heating process, making it ideal for the office, home, or college dor… |
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Cuisinart ICE-21 Frozen Yogurt-Ice Cream & Sorbet Maker Now you can enjoy the finest homemade frozen treats at home! The fully automatic Cuisinart Frozen Yogurt-Ice Cream & Sorbet Maker lets you make your favorites in 20 minutes or less, with no fuss and no mess. Just add ingredients to the bowl, press ON and the machine does the rest!… |
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Aroma AWK-115S Hot H20 X-Press 1-1/2-Liter Cordless Water Kettle $30.99 The Hot H20 X-Press from Aroma provides boiling water in a matter of minutes. The 1.5-liter capacity is ideal for a variety of uses–hot tea, soups, instant coffees, oatmeal, hot chocolate, noodles, baby formula and more. Once water reaches a boil, the kettle will automatically shut off and lifts off its base for easy, cord-free pouring. The beautiful polished stainless steel finish looks grea… |
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Black Ice $0.75 Black Ice is AC/DC’s first studio album in over eight years, since 2000’s Stiff Upper Lip. Track listing: 1. Rock N’ Roll Train 2. Skies on Fire 3. Big Jack 4. Anything Goes 5. War Machine 6. Smash N’ Grab 7. Spoilin’ For A Fight 8. Wheels 9. Decibel 10. Stormy May Day 11. She Likes Rock N’ Roll 12. Money Made 13. Rock N’ Roll Dream 14. Rocking All the Way 15. Black Ice… |
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Black Ice (Deluxe Edition) $10.95 Black Ice is AC/DC’s first studio album in over eight years, since 2000’s Stiff Upper Lip. Deluxe edition includes 30-page booklet with lyrics and exclusive photos. Track listing: 1. Rock N’ Roll Train 2. Skies on Fire 3. Big Jack 4. Anything Goes 5. War Machine 6. Smash N’ Grab 7. Spoilin’ For A Fight 8. Wheels 9. Decibel 10. Stormy May Day 11. She Likes Rock N’ Roll 12. Money Made 13. R… |
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Black Ice (Limited Edition White Cover) $1.25 Limited edition white cover. Black Ice is AC/DC’s first studio album in over eight years, since 2000’s Stiff Upper Lip. Track listing: 1. Rock N’ Roll Train 2. Skies on Fire 3. Big Jack 4. Anything Goes 5. War Machine 6. Smash N’ Grab 7. Spoilin’ For A Fight 8. Wheels 9. Decibel 10. Stormy May Day 11. She Likes Rock N’ Roll 12. Money Made 13. Rock N’ Roll Dream 14. Rocking All the Way 15… |
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Belkin Mini Surge Protector Dual USB Charger $9.99 Protect your electronic devices while traveling…. |
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Belkin BE112230-08 12-Outlet Home/Office Surge Protector with Telephone and Coaxial Protection $49.99 SAFETY COVERS FOR OUTLETSSLIM DESIGN FOR COMPACT STORAGEORGANIZES CABLES WITH DETACHABLE CORD MANAGEMENT CLIPFLAT-PROFILE PLUG12 OUTLETSTELEPHONE & COAXIAL PROTECTION3780 JOULES8-FT POWER CORDLIFETIME WARRANTY$300000 CONNECTED EQUIPMENT WARRANTYUPC : 722868594322Shipping Dimensions : 14.75in X 6.00in X 2.00inEstimated Shipping Weight : 2.15… |
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Black & Decker 9099KC 7.2-Volt Cordless Drill with Keyless Chuck $19.88 BLACK and DECKER CORDLESS DRILL *7.2 volts *1/2″ chuck size *Ni-CD battery *2 speed reversible *Mid handle design *Keyless chuck *2 year warr… |
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Remington S9950 Shine Therapy Moisturizing and Conditioning Digital Ceramic Hair Straightener, 1 $29.99 Description:This straightener features ceramic plates infused with avocado and vitamin E conditioners that are evenly emitted onto the hair during styling to add shine and protect hair from unnecessary thermal stress. The straightener reaches a top heat of 430 degrees Fahrenheit in 30 seconds for fast, long-lasting results.Features: Features high heat temperature up to 230 degree C to 446 degree F… |
Ebay listings for Switch Voltage products.
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1 HP Convertible Shallow or Deep Well Jet Pump w/ Pressure Switch, Dual Voltage $184.95 |
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Leviton Monet Black Low Voltage Light Dimmer Switch $179.95 |
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NEW Leviton Monet Gray Low Voltage Light Dimmer Switch $179.95 |
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NEW Leviton Monet Ivory Low Voltage Light Dimmer Switch $179.95 |
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Leviton Monet Almond Low Voltage Light Dimmer Switch $179.95 |
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Shallow Well Jet Pump (1/2, 3/4 or 1 HP) w/ Pressure Switch, Dual Voltage $179.95 |
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1 HP Shallow Well Jet Pump w/ Pressure Switch, Dual Voltage $179.95 |
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3/4 HP Convertible Shallow or Deep Well Jet Pump w/ Pressure Switch,Dual Voltage $144.95 |
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Shallow Well Jet Pump (1/2, 3/4 or 1 HP) w/ Pressure Switch, Dual Voltage $139.95 |
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3/4 HP Shallow Well Jet Pump w/ Pressure Switch, Dual Voltage $139.95 |
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10x 12V 24V Auto Switch LED Light Bulb Lamp ES27 Edison Screw E27 Wide Voltage $125.00 |
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1/2 HP Convertible Shallow or Deep Well Jet Pump w/ Pressure Switch,Dual Voltage $124.95 |
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craftsman dual voltage belt drive table saw motor and switch113.299xxx $120.00 |
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Leviton Monet Black Low Voltage Light Dimmer Switch $119.95 |
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Leviton Monet Almond Low Voltage Light Dimmer Switch $119.95 |
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Leviton Monet Ivory Low Voltage Light Dimmer Switch $119.95 |
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Intermatic GM40 Multi-Voltage General Purpose Time Switch $100.00 |
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Shallow Well Jet Pump (1/2, 3/4 or 1 HP) w/ Pressure Switch, Dual Voltage $109.95 |
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1/2 HP Shallow Well Jet Pump w/ Pressure Switch, Dual Voltage $109.95 |
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Leviton Monet Almond Low Voltage Light Dimmer Switch $98.95 |
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Leviton Vizia 600W Electronic Low Voltage Dimmer Switch $98.95 |
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Leviton Vizia 600W Electronic Low Voltage Dimmer Switch $98.95 |
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Lutron MAELV-600 Maestro Electronic Low Voltage Dimmer Switch $85.00 |
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Central Vacuum Hose ON/OFF SWITCH LOW VOLTAGE 50 FT $90.19 |
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Low Voltage Central Vacuum Hose w/Switch 30 ft – Grey 06-1120-99 $69.95 |
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30′ Foot Beam Central Vacuum Low-voltage with on/off Switch New Vac HOSE $63.94 |
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Central Vacuum Hose ON/OFF SWITCH LOW VOLTAGE 35 FT $75.94 |
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Central Vacuum Hose ON/OFF SWITCH LOW VOLTAGE $71.19 |
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Lutron MAELV-600 Maestro Electronic Low Voltage Dimmer Switch $60.00 |
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Leviton Almond Decora Light Dimmer Switch Low Voltage $64.95 |
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Leviton Gray Monet Light Dimmer Switch Low Voltage $64.95 |
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Leviton White Monet Light Dimmer Switch Low Voltage $64.95 |
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Outdoor Mechanical Time Switch GE Universal 120/ 240/ 277 voltage 24 hour $60.00 |
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(5) White Low Voltage Slide Dimmer LED 700W Single Pole Three 3Way Preset Switch $49.99 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $58.99 |
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Leviton White Dimmer Switch Multi-Way Decora Lo Voltage $54.95 |
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New Varilight Pewter 1 x 630w Rotary Low Voltage Dimmer Light Switch $47.64 |
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New Varilight Brushed Matt Chrome1 Gang 630Watt Single Low Voltage Light Switch $47.36 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $52.00 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $51.00 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $49.99 |
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Leviton White Dimmer Switch MultiWay Low Voltage 1000VA $49.95 |
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Leviton Ivory Dimmer Switch MultiWay Low Voltage 1000VA $49.95 |
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Leviton White Vizia 1000W/VA Low Voltage Dimmer Switch $44.95 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $45.99 |
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Leviton White Almond Dimmer Switch 3-Way Low Voltage $39.95 |
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Milwaukee 23-66-2300 Switch-Low Voltage Dc $42.52 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $40.99 |
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Leviton Ivory Dimmer Switch Multi-Way Low Voltage 600VA $34.95 |
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Leviton White Dimmer Switch Multi-Way Low Voltage 600VA $34.95 |
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Milwaukee 23-66-2520 Switch, D.C Low Voltage $38.25 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $36.99 |
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Vintage Low Voltage Light Switch Square D # 1091C control switch New Old Stock $32.50 |
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DMX512 Decoder 4 Channels RGBW DMX Driver Constant Voltage DIP Switch $36.00 |
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Low Voltage Ceiling Occupancy Motion Sensor Switch MPC-50L-W Ceiling Sensor $35.99 |
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Lot 9 Low Voltage Electric Magnetic Switch Brake Plunger Type 483-0 X9D HO1 LO1 $25.99 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $35.99 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $35.00 |
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DC12V Switch Power Supply Voltage Transformer for LED strip $35.00 |
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LEVITON VZM06-1LX Vizia Magnetic Low-Voltage Dimmer Switch $33.99 |
What Is A Switching Power Supply?
There are many types and designs of power supplies. This article will describe what is commonly known as a switching power supply, sometimes referred to as a switched mode power supply (SMPS), or ’switcher’.
All electronic circuits require a voltage source in order to operate. In the United States, the most common voltage available to consumers from the electric utility is the 120V RMS nominal alternating current found at outlets throughout homes and businesses. In contrast, most electronic circuits in use today require a stable direct current source with a much lower voltage – usually 3 to 12 volts.
Virtually every electronic device that operates from the AC mains must include a circuit that will derive a different voltage from the 120 volts that the utility provides. This is accomplished by a type of circuit referred to as a power supply. Power supplies can be generally grouped into two classes of operation.
Linear power supply designs are quite common and familiar to most people. They use a ‘brute force’ method of power conversion and regulation. The AC mains voltage is fed directly to a transformer which converts the 120V AC to the highest voltage required by the circuit it is designed to supply. The lower voltage is then converted to DC via a bridge rectifier, and then regulated by a transistor operating within its linear range – thus being dubbed a ‘linear’ power supply.
The advantage of linear power supply designs is that they are simple and straightforward. Disadvantages include inefficiency (50% or less), large physical size and weight, and generation of heat.
Switching power supply designs are typically more complex than their linear counterparts. As a result, the SMPS is also more versatile. SMPS design allows for either AC or DC input, and can output either AC or DC voltages, depending on circuit topology.
In a popular AC to DC SMPS design, the incoming AC mains voltage is first converted to DC using a bridge rectifier. This DC voltage is then fed to a ‘chopper’ stage containing highly efficient MOSFET switching transistors. The gates of the transistors are fed by an oscillator providing a constant frequency, pulse width modulated (PWM) signal (usually in the range of 50 to 300KHz) in order to ‘chop’ the DC into a high frequency AC voltage. This AC voltage is fed into the primary winding of a high frequency transformer. The transformer secondary winding voltage is then rectified to DC for use in the circuits where it is required. Regulation of the output voltage is accomplished by a circuit that samples the output voltage, and signals the PWM oscillator to vary the ratio of transistor ‘on’ time to ‘off’ time to maintain a constant voltage output.
There are significant advantages of this design over the linear design. The High Efficiency of the switching transistors (80 to 90%) means less energy is wasted as heat, and the high frequency of operation allows for a much smaller and lighter transformer to be used.
Should an AC input voltage not be available – such as in an automotive application – the designer need only remove the rectifier stage from the power supply input, and use a high frequency transformer with the appropriate turns ratio to provide the desired output voltage.
In summary, the principal advantages of the SMPS are its ultra high efficiency, along with a significant reduction in size and weight. In today’s world where efficiency and portability have become more important than ever, the SMPS is quickly becoming the preferred design for power supply circuits.
About the Author
Global Test Supply, LLC is a distributor of test and measurement equipment, and welcomes question from those looking for a DC Power Supply
Korg MS Series – Voltage Controlled Switching
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