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 New LINEAR LT1377 CS8 High Efficiency 1.5A Switching Regulators﹝8-SOIC﹞.1Pc. US $1.95 
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 5A Efficient Switching Regulator IC SH1605 ( NEW ) US $28.80
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 LM2593 2 Amp Switching Regulator IC, Variable 4-60V US $4.50
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 UC2577 Step-UP 3A Integrated Switching Regulator IC x4 US $9.90
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 MC34167 5 A Step UP/DOWN/Invert Switching Regulator US $.99
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 Cosel Power Supply K10AU-12 .9 A switching regulator US $29.99
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 UC2577 Step-UP 3A Integrated Switching Regulator IC US $.99
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 LM3578A LM3578AN Switching Regulator : Lot of 3 US $4.99
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 2 Set LM2577 3A Step Up ADJ Switching Regulator KIT S U2S US $7.00
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 LM2677 5 Amp Integrated Switching Regulator 2-40V Qty:2 US $8.90
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 SALE! POWER TRENDS TEXAS INSTRUMENT #PT7777a 1.3V -3.5V INT. SWITCHING REGULATOR US $35.00
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 NEW NSC-SOP- LM2675M-5.0 SWITCHING REGULATOR IC US $12.99
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 NEW FLYBACK SWITCHING REGULATORS - model: STRF6653 US $5.35
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 NEW OFF-LINE SWITCHING REGULATORS - model: STRS6703 US $13.40
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 NEW SANYO SEMI-REGULATED SWITCHING REGULATOR STK730-090 US $7.15
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 MC34163DW Manu:MOT Encapsulation:SOP-16,POWER SWITCHING REGULATORS US $4.50
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 MB3778PFV Manu:FUJITSU Encapsulation:SOP-16,Switching Regulator Controller US $2.00
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 STEP DOWN SWITCHING REGULATOR IC L4971 L4971D NEW! US $10.00
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 C494GS Manu:IR Encapsulation:SOP-16,SWITCHING REGULATOR CONTROL CIRCUIT US $2.00
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 10 pcs Switching Regulator LM2576HVT-ADJ LM2576 TO-220 US $14.99
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 TL497ACN Manu:TI Encapsulation:DIP-14,SWITCHING VOLTAGE REGULATORS US $3.00
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 MIC2172BM Manu:MICREL Encapsulation:SOP-8,100kHz 1.25A Switching Regulators US $3.00
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![LM5010MH [LM5010] Switching Regulator IC](http://www.stats-consult.com/images/plus/extra12Z578628504_0143.jpg) LM5010MH [LM5010] Switching Regulator IC US $14.99
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 100 pcs Switching Regulator LM2576HVT-ADJ LM2576 TO-220 US $99.99
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 2SC3990 Switching Regulator IC US $7.99
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 100pc Switching Regulator LM2576T-5.0 LM2576 5.0V TO220 US $99.99
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 MA2450 Manu:SK/SHINDENG Encapsulation:ZIP-7,Power Switching Regulators US $3.50
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 UC2577 Step-UP 3A Switching Regulator IC (LM2577)* US $.99
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 2SC3989 Switching Regulator IC US $12.80
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 RC4190N Manu:RAYTHEON Encapsulation:DIP-8,Micropower Switching Regulator US $3.50
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 M51997P Manu:MIT Encapsulation:DIP-14,SWITCHING REGULATOR CONTROL US $5.00
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 Switching Regulator N-Channel Power MOSFET 2SK3568 3Pcs US $4.77
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 10pc Switching Regulator LM2576T-5.0 LM2576 5.0V TO-220 US $14.99
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 10pcs Switching Regulator LM2575T-12 LM2575 TO-220 US $9.99
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 10pcs Switching Regulator LM2575T-3.3 LM2575 TO-220 US $9.99
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 10pcs Switching Regulator LM2575T-5.0 LM2575 TO-220 US $9.99
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 10pcs Switching Regulator LM2575T-ADJ LM2575 TO-220 US $9.99
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 Lot (11) National Semiconductor LM2576T 3.3 volt switching regulator TO220 case US $9.73
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 LM2825 -ADJ Complete Switching Voltage Regulator IC x2 US $10.98
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 MC34167 5 A Step UP/DOWN/Invert Switching Regulator x2 US $1.90
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 2 pcs Switching Regulator LM2576HVT-ADJ LM2576 TO-220 US $6.99
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 Linear - LT1776 Buck (step-down) switching regulator US $5.51
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 CCor H.E. Switching Regulator Power Supply P/N 122027-04 REV. D USED US $50.00
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 20pcs Switching Regulator LM2575T-12 LM2575 TO-220 US $17.99
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 20pcs Switching Regulator LM2575T-3.3 LM2575 TO-220 US $17.99
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 20pcs Switching Regulator LM2575T-5.0 LM2575 TO-220 US $17.99
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 20pcs Switching Regulator LM2575T-ADJ LM2575 TO-220 US $17.99
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 2pc Switching Regulator LM2576T-5.0 LM2576 5.0V TO-220 US $6.99
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 UC2577 Step-UP 3A Integrated Switching Regulator IC x5 US $10.90
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 50 pcs Switching Regulator LM2576HVT-ADJ LM2576 TO-220 US $59.99
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 15 Pieces Linear Tech LT1372CS8 Switching Regulator US $4.95
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 50pc Switching Regulator LM2576T-5.0 LM2576 5.0V TO-220 US $59.99
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 LT1105CN8 Manu:LT Encapsulation:DIP-8,Offline Switching Regulator US $5.00
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 UPC494G Manu:NEC Encapsulation:SOIC-16,SWITCHING REGULATOR CONTROL CIRCUIT US $2.00
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 MB3775 Manu:FUJITSU Encapsulation:DIP,SWITCHING REGULATOR CONTROLLER US $5.00
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 UC2577 Step-UP 3A Integrated Switching Regulator IC x2 US $5.70
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 M51996 Manu:MITSUBISHI Encapsulation:SOP-16,SWITCHING REGULATOR CONTROL US $3.00
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 2 Set LM2577 3A Step Up ADJ Switching Regulator KIT H U2S US $6.00
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 2 Set LM2596 3A Step Down ADJ Switching Regulator KIT S U2S US $6.50
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 MC34166D2 POWER SWITCHING REGULATORS US $7.95
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 MC34167 POWER SWITCHING REGULATORS US $7.95
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 MC33362 HIGH VOLTAGE OFF-LINE SWITCHING REGULATOR US $7.95
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 MC34167D2 POWER SWITCHING REGULATORS US $7.95
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 MC33166 POWER SWITCHING REGULATORS US $7.95
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 MC33166D2 POWER SWITCHING REGULATORS US $7.95
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 MC33363 HIGH VOLTAGE OFF-LINE SWITCHING REGULATOR US $7.95
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 MC33167D2 POWER SWITCHING REGULATORS US $7.95
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 MC33163 POWER SWITCHING REGULATORS US $7.95
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 MC34166 POWER SWITCHING REGULATORS US $7.95
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 2SK3662 Manu:TOSHIBA Encapsulation:TO-220,Switching Regulator, DC-DC US $2.00
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 HA16664 Manu:HITACHI Encapsulation:DIP-8,PWM Controlled Switching Regulator US $3.00
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 L4962 Manu:ST Encapsulation:DIP,1.5A POWER SWITCHING REGULATOR US $3.00
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 TA76494P Manu:TOSHIBA Encapsulation:DIP-16,General Use Switching Regulator US $3.00
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 LT1076HVIT Manu:LT Encapsulation:TO-220,Step-Down Switching Regulator US $5.00
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 STRS5707 Manu:SANKEN Encapsulation:SIP-9,OFF-LINE SWITCHING REGULATORS - WITH US $5.00
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 SH1605 Manu:FSC/BB Encapsulation:TO-3/8,5A Efficient Switching Regulator US $16.00
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 STRM6529 Manu:SANKEN Encapsulation:ZIP-7,OFF-LINE SWITCHING REGULATOR . WITH US $5.00
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 LT1105CN Manu:LT Encapsulation:DIP-14,Offline Switching Regulator US $5.00
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 UC2577 Step-UP 3A Switching Regulator IC TO263 (LM2577) x10 US $9.90
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 4PC LM2576HVT-ADJ Switching Regulator IC TO-220 (K37) US $7.99
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 10PC LM2576HVT-ADJ Switching Regulator IC TO-220 (K37) US $14.98
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 50PC LM2576HVT-ADJ Switching Regulator IC TO-220 (K37) US $58.98
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 100PC LM2576HVT-ADJ Switching Regulator IC TO-220 (K37) US $98.00
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 2SC3459 NPN for switching regulator US $3.75
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 LTC1439IG - LTC1439 Step-Down Switching Regulators IC US $9.93
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 LTC1753CG - LTC1753 Switching Regulator Controller IC US $10.98
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 LT1576CS8 - LT1576 200kHz Step-Down Switching Regulator IC US $8.93
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 STK7404 SWITCHING REGULATOR BY SANYO LOT OF 2 US $19.95
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 Linear Technology LTC1735CS Synchronous Switching Regulator PWM IC US $9.99
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 STK730-080 switching regulator (210 W output) LOT OF 3 US $7.75
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 UC2577 Step-UP 3A Switching Regulator IC (LM2577)* x4 US $6.90
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 PIC600 - Switching Regulator 5 A US $29.99
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 2 Set LM2596 3A Step Down ADJ Switching Regulator KIT H U2S US $6.50
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 HA16108P - HA16108 PWM Switching Regulator IC US $12.35
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 Step-Up MC34063 Based Switching Regulator Adapter USA US $7.00
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 Step-Down MC34063 Based Switching Regulator Adapter USA US $7.00
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 AX3022 Based Switching Regulator Adapter Step-Down *USA US $11.25
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 MC34063A switching regulator IC SMPSU MC34063 34063 US $1.00
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 Switching Adj 2-45V Regulator BOARD DC/DC Converter 2.5A NEW US $18.00
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Switching Regulator
The Electronic Cigarette Explained
I don't like the word quit when using it in regards to electronic cigarette use, wrote Sam, an e cigarette user.
He was commenting on the Facebook wall of Unstoppable, the EU campaign to stop smoking.
Sam is a member of a new social group, with a new habit - and a vocabulary that didn't exist until a few short years ago.
Sam is a vaper, a person who vapes. The word is taken from the action of using an electronic cigarette (or personal vaping device), a device which vaporizes nicotine containing liquid (e-juice).
In contrast to tobacco cigarettes (analogues) no combustion takes place. This distinction is crucial, say supporters of tobacco harm reduction, as most of the damage of smoking is caused not by nicotine, nor by the tobacco, but via the action of burning tobacco.
Quitting or Switching?
The device has caused immense debate.
Tobacco harm reduction enthusiasts and scientists have embraced the device, while some anti-smoking groups fear that it will threaten the denormalisation of smoking - and the groups funding from the nicotine cessation industry.
Needless to say, tobacco companies have come out against the device.
One key distinction which has been argued over is whether the device is a way to quit tobacco cigarettes, or simply an alternative for smokers who can't or don't want to quit.
If it leads to quitting, then the device may not be marketed to smokers without years of trials. The device could/would effectively be removed from the market for a number of years.
Surveys in both the US and the UK suggest that approximately two-thirds of smokers would return to cigarettes. With an estimated 1,300,000 vapers in the two countries, that would be a massive boost to the tobacco industry.
However, if the device is simply an alternative to regular cigarettes, it falls in a legal no-mans land, and can continue to be marketed by the small independent companies that have sprung up in the few short years since the e-cigarettes invention.
So which is it - a way to quit, or a superior alternative to cigarettes?
The vaping community itself is split on the issue.
Some maintain they are no longer smokers. But Sam, at least, is clear on the issue. On the Facebook wall of Unstoppable, he states:
I know for a fact that if I am caught without a charged battery or eliquid I WILL go to the local and pick up a pack of Analogues [tobacco cigarettes].
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Frequently Asked Questions...
What is the most efficient switching regulator for high power LEDs?
Originally I though stcs1 was good but the voltage matching is giving me issues. I am going to be using an arduino based system and shields to pwm dim all circuits from 5%-100% essentially the arduino runs all circuits 24/7. This is for an aquarium so I want to be able to mimic the moving moon electronically 
which switching regulator is most efficient for boosting at constant 24vdc? The LEDs in using are 1 and 3w stars at .350a and .7a
Thanks!
Answer:
If you do this carefully, you can drive a FET gate with the PWM signal of the 'duino and run the LEDs in series with the drain and an inductor. The FET will isolate you from the 24V. That'll work if you don't need to boost more than the 24V, and you keep your pulse widths short. Otherwise try some of the LED driver chips from Linear Technology etc.
