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Table Lamp With Auxiliary 12v Automotive Style LED Light - This circuit provides
about one watt of non-isolated DC power for an automotive type 12v LED array lamp in
addition to a standard incandescent table lamp. ….(designed by David A. Johnson) |
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TB060: Drive High Intensity White LEDs Efficiently using the PIC16C781 - Microchip
Application Note Published 17-Jul-02 (app note added 2/06) |
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TB062: High Power IR LED Driver using the PIC16C781/782 - Microchip Application
Note Published 26-Sep-02 (app note added 2/06) |
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Telephone in Use LED Indicator - (electronic circuit added 7/03) |
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Telephone in Use Light - ASCII format (electronic circuit added 7/03) |
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Telephone In-Use LED Indicator - (electronic circuit added 4/05) |
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The LED Flashing Sweetheart Kit - When was the last time you gave a gift you made
yourself? Elementary school? Get off the consumerist fast track and quit copping out
with inferior gifts like candy and flowers. The LED Flashing Sweetheart Kit contains a
circuit board, 28 LEDs ...(added 6/07) |
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The Propeller a mechanically scanned LED clock - (electronic Circuit / Schematic
added 10/04) |
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Three Fake Alarms - Flashing LEDs can be used to create the impression that an
alarm has been fitted. Or they can be used in conjunction with a real alarm, to
warn-off a potential thief. These three small circuits will flash anything from a
single LED, up to 90 LEDs and beyond, with a variety of speeds and patterns. |
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Three Flashing LED Doorbells - These circuits combine a buzzer with one or more
LED displays. When the push switch is operated, the buzzer will sound and the LEDs
will flash. When the switch is released, the buzzer will stop, but the LEDs will go on
flashing for another 30 seconds or so. |
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Three microController Ports drive 12 LEDs - 12/15/06 EDN-Design Ideas: (design
idea added 05/07) Engine tachometer uses few components and I/O lines. |
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Three-Colour Display using Bicolour LEDs - (electronic Circuit / Schematic added
10/04) |
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Tiny Efficient High Power LED Camera Flash Solutions for Cell Phone Applications -
Linear Technology Design Note 231 (app note added 02/05) |
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Tiny Regulators Drive White LED Backlights - Linear Technology Design Note 231
(app note added 02/05) |
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Torch Circuits-LED - A LED torch is one of the simplest projects you can build and
it's very interesting as it uses a super-bright white LED. In the history of LED
production, red LEDs were the first to be invented and their output was so dim you
could barely see if they were illuminated. You needed a darkened room to see them at
all....(circuits added 08/08/08) |
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TPS6102x Boost Converter Down Conversion Mode - TI Application Note (added
2/06) |
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TPS61040 Inverter Design Rev. A - TI Application Note (added 2/06) |
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TPS61042 Dual Li-ION & Higher Input Voltages - TI Application Note (added
2/06) |
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TPS61042 White Light LED Driver Boost Converter Rev. A - TI Application Note
(added 2/06) |
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Transistor LED flasher - This circuit has a lot going for it. For one thing, it
only consists of two transistors, two capacitors and four resistors. That also means
it consumes very little power. You can control the flash rate by changing the size of
the 100k resistors (100k makes for a pretty slow rate). You can also control the duty
cycle by using resistors of different values on the two sides.....(added 10/05) |
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Transistor LED Flasher (Jose Pino) - A simple LED flasher that uses only two
transistors, one capacitor and one resistor. This basic oscillator can have other
simple applications. (6/10/2006) |
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Trip the Light Fantastic with LED Gadget Freaks - Here is a collection of the best
LED gadgets that have made themselves home in Gadget Freak…..(circuit added 08/08) |
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Two LEDs Perform Rudimentary Spectral Analysis - 09/01/94 EDN-Design Ideas: A pair
of LEDs having different wavelengths can supply the stimulus for a rudimentary
spectral analysis during quality-control sorting operations. By measuring the
reflectance of each LED, the circuit in Fig 1 can provide information about the
spectral response of the object under test. The circuit's.....(design idea added 3/03) |
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Two Signals Easily Control Tricolor LED - 09/14/95 EDN-Design Ideas: (design idea
added 3/03) |
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Two Transistor LED Flasher - This circuit will flash a bright red LED (500
mcd as an attention getting device or fake car alarm. Componten Values are not
criticl and transistors may be used. Flash duration is determined by
R2….(circuit design added 5/09) |
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Two Transistor LED Flasher #2 - (electronic design added 9/02) |
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Two-LED Pilot Light - 230 or 115 Vac mains operated Very simple circuitry (added
9/04) |
