• Home
  • News
  • Magazine
  • Shop
  • Subscribe now
  • Forum
  • Service

Search

Subject Area

Articles

Products

My Elektor

Log in

Email:

Password:

Remain logged in

Password forgotten?
Register

Shopping cart Shopping cart

Info Elektor Credits: 0

Home › Magazines › 2008 › January › Ballast for Energy-saving Lamps

‹ previous
next ›

Ballast for Energy-saving Lamps

CFL preheats, ignites and lights on single-chip driver

Published in issue 373, January 2008

Ballast for Energy-saving Lamps
As opposed to the good old light bulb, a CFL needs an amount of electronics to start and light properly. Here we show a suitable circuit. This compact ballast is intended for driving a 20-watt ‘bare’ CFL tube or bulb, that is, one without a driver circuit built into its socket that makes it ready to screw into an existing lamp socket.

Components

Relevant websites

Resistors
R1 = 470kΩ
R2 = 82kΩ
Capacitors
C1 = 100nF 25V
C2 = 470pF 1000V
C3 = 33nF 630V
C4 = 10µF 400V
C5 = 10µF 50V
C6 = 2nF7 1000V
Inductor
L1 = 2.5mH; 280 turns 0.2mm ECW on E19 bobbin (EPCOS)
Semiconductors
D1,D2,D7 = UF4007
D3-D6 = 1N4007
IC1 = FAN7710N (Fairchild)
Miscellaneous
K1,K2,K3 = PCB terminal block, 7.5mm lead pitch
F1 = fuse, 100mAT (slow)
PCB, FAN7710N IC and 2.5 mH coil; order code 070638-71

Click below to download a PDF copy of this article from Elektor magazine.

 

Downloads 
PDF article
10 Elektor Credits
PDF PCB
Free download
 

Order this magazine 
Magazine January 2008
EN373 (USD 6.30)
 

Order from Elektor 
PCB, FAN7710N and 2.5mH coil
070638-71 (USD 25.50)
PCB, bare
070638-1
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

Subscribe now

Subscribe now
Subscribe now
Browse online
More

Subscribe to our free
E-weekly Newsletter!

Enter your Email address:

Follow Elektor

      

Act now!

> Become an Elektor Member

> Register for E-weekly

> To Elektor-plus.com

> Become a supporting company

> Check Elektor Showcase

> To FAQs

Sponsored

NEW!
Embedded Code Source
Browse & download free software/firmware code examples for your PIC® MCU projects. Find code for controlling simple timers, UARTs, low power modes, FFTs, LCD displays, motors & more!

FAQ

Before submitting questions, review our FAQ section!

Bestseller

Controller Area Network Projects

The aim of this book is to teach you the basic principles of CAN networks and in addition the development of microcontroller based projects using the CAN bus.

More

Package Deals

Elektor Bundles

Check our Package Deals and save money! Discounts up to 19% now available!

More

Price Slashed

Elektor OSPV

This Open Source People Vehicle is perfect for factory halls, warehouses, hospitals, colleges, schools etc.

More

© 2012 Elektor•Feedback•Media Data•Disclaimer•General conditions•Sitemap•RSS