Gadget Freak Case #159: PWM Line-Voltage Interface Brightens Your Outlook

DN Staff

February 24, 2010

5 Min Read
Gadget Freak Case #159: PWM Line-Voltage Interface Brightens Your Outlook

Several of William Grill's designs have included pulse-widthmodulator (PWM) circuits that control LEDs. But what about the control of line-poweredlamps and fixtures? You can find several commercial PWM controllers, but buildone yourself, save money and learn how to implement a microcontroller-baseddesign. This circuit is no flash in the pan.

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Gadget Freak Case 159 PWM Line-Voltage Interface Brightens Your Outlook

Gadget Freak Case 159 PWM Line-Voltage Interface Brightens Your Outlook A



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Part Description

Allied Part #

1

CNY17-1 Optical Isolator

431-0064

1

MOC3010 Optical Isolator

See Text

3

47-ohm, 1/8W Resistor

296-4733

2

2.2 Kohm, 1/8W Resistor

296-4725

1

5.1 Kohm, 1/4W Resistor

296-6517

1

10-Kohm, 1/8W Resistor

296-4721

1

1-Mohm, 1/8W Resistor

296-6647

1

Green LED

405-0106

1

0.47 I.25F, 250V Capacitor

862-0602

1

4.7 I.25F, 50V Capacitor

852-7070

2

10 I.25F, 10V Capacitor

541-0585

1

22 I.25F, 50V Capacitor

852-7074

2

1N4003 Diode

411-0003

1

L6004L5 Triac

846-0051

1

12F675 PIC Microcontroller

383-0292

1

MCP6002 Op Amp

383-0227

1

1N5231 Zener Diode

431-0365

1

78L05 Voltage Regulator

288-0630

1

2-Pole Terminal Block

502-0421

2

2-Pole Terminal Block

502-0492

2

8-Pin DIP Socket

374-4541

1

6-Pin DIP Socket

374-4540

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