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Video Design Idea: MicroController drives 20 LEDs - 09/27/07 EDN-Design Ideas:
Dhananjay V Gadre of the Netaji Subhas Institute of Technology in New Delhi, India,
details and demonstrates the use of "Charlieplexing" to drive 20 LEDs using six
available I/O pins on an 8-pin microcontroller.....(design idea added 9/08) |
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Visible Laser Driver Has Digitally Controlled Power Modulation - Maxim Application
Notes / 228 / Mar-10 (app note added 5/08) |
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Voltage to Current Converter Makes a Flexible Current Reference - 09/18/03 EDN-Design
Ideas: The voltage-to-current converter in Figure 1 can both source and sink current.
The circuit is more flexible than some traditional current references that require
different topologies for current sourcing and sinking. Also, you can easily adjust the
value of the current reference by simply adjusting the circuit's input
voltage.....(design idea added 12/04) |
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Voltage-to-current converter drives white LEDs - 06/27/02 EDN-Design Ideas: You
sometimes need to drive a white LED from one 1.5V battery. Unfortunately, the forward
voltage of a white LED is 3 to 4V. So, you would need a dc/dc converter to drive the
LED from one battery. Using the simple circuit in Figure 1, you can drive one white
LED or two series-connected green LEDs, using only a few components.....(design idea
added 9/03) |
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Wall Clock Governor Driver - (electronic schematic / circuit added 2/05) |
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White LED drive from 1.5V - How do you get 3.5 volts to drive a white LED when you
only have a 1.5v battery?...(schematic / circuit added 6/07) |
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White LED Driver Backlights LCD & Keypad - 11/13/03 EDN-Design Ideas: Designers
widely use white LEDs to backlight color LCDs and keypads in handheld devices, such as
cell phones, MP3 players, GPS navigators, and PDAs. Their spectrum and brightness
represent near-ideal light sources. One possible configuration for a phone or a
phone/PDA combination is to have a group of three LEDs.....(design idea added 1/05) |
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White LED Driver in Tiny SC70 Package Achieves 84% Efficiency - Linear Technology
Magazine Design Ideas August 2002 (app note added 2/05) |
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White LED Driver in Tiny SC70 Package Delivers High Efficiency & Uniform LED
Brightness - DN315 Design Notes (Linear Technology) (app note added 6/06) |
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White LED driver operates down to 1.2V supply voltage - 09/03/07 EDN-Design Ideas:
This circuit beats commercially available LED drivers, which bottom out at 2.5V input
voltage, by operating at voltages as low as 1V.....(design idea added 09/08) |
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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) |
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White LED Driver Touts High Efficiency - 06/12/03 EDN-Design Ideas: White LEDs,
the most recent addition to the LCD backlight, find common use in providing backlight
for color LCDs. Thanks to their size and white-light output, they appear in small,
portable devices with color displays, such as PDAs and cellular phones. Like other
LEDs, a white LED needs a constant-current source—typically,.....(design idea added
7/03) |
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White Light LED Driver with Gradual Dimming - TI Application Note (added
6/06) |
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Wide Input Range 1a LED Driver Powers High Brightness LEDs with Automotive & 12 VAC
Supplies - DN1012 Design Notes (Linear Technology) (app note added
10/06) |
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Wideband Low Noise Amplifier Drives 50 Ohm Loads - 10/23/97 EDN-Design Ideas:
/.....(design idea added 4/02) |
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ZXSC100 Single cell DC-DC converter LED driving applications - Zetec
Semiconductors Applications Notes ZXSC100 single cell DC-DC converter offers an
ideal solution to driving white LEDs in flashlights, enabling operation from a single
NiCd or NiMH cell. (app note added 10/06) |
