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Two Wire DC Lamp Dimmer replaces Rheostats - 10/23/97 EDN-Design Ideas: Originally
for use in commercial trucks, a low-cost dc lamp dimmer (Figure 1)can control more
than 100W of incandescent panel lighting and replaces a high-power rheostat, whose
heating darkens the instrument panel. The circuit has several unique advantages: A
two-wire connection means no change to existing wire harnesses,.....(design idea added
3/03)
Varying Brightness AC Lamp - SCR is used to slowly vary the intensity of a120 volt
light bulb by controlling the Time that the AC line voltage is applied to the lamp
during each half cycle (added 4/02)
White LED Driver Provides 64 Step Logarithmic Dimming - 06/10/04 EDN-Design Ideas:
The circuit in this Design Idea is designed for portable-power applications that
require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as
many as four white LEDs from a 3.3V source.....(design idea added 1/05)