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LED (Light
Emitting Diodes) Circuits Page 1d
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Last Updated on:
Wednesday, November 29, 2017 05:40 AM |
| Circuits Designed by Dave
Johnson, P.E. : |
- 40KHz
TV-VCR LIGHT SOURCE REPEATER
This circuit is designed to be placed directly in front of a standard TV or VCR
remote. The exiting light pulses produced by the circuit match the pulses from the
remote but are about 10 times more powerful. Using the device, the remote can
operate a TV or VCR over three times the normal distance.
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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3-Colour Display using Bicolour LEDs - ..... |
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3D LED Pyramid - The author ‘just wanted to do a bit of
microcontroller programming’. However, the project rapidly grew into this
impressive and visually attractive pyramid. The circuit consists
essentially of a specially-sawn.... [Published in Elecktor July/August
2010] |
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3V LED Chaser - ….(electronic schematic added 03/08)
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3x3x3 LED Cube - This circuit drives a 3x3x3 cube consisting of
27 white LEDs. The 4020 IC is a 14 stage binary counter and we have used 9
outputs. Each output drives 3 white LEDs in series and we have omitted a
dropper resistor... |
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40 LED Bicycle Light 555 Timer 6 Volt - The 555 circuit below is
a flashing bicycle light powered with four C,D or AA cells (6 volts). Two
sets of 20 LEDs will alternately flash at approximately 4.7 cycles per
second using RC.... |
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40kHz TV-VCR Light Source Repeater - This circuit is designed to
be placed directly in front of a standard TV or VCR remote. The exiting
light pulses produced by the circuit match the pulses from the remote but
are about 10 times more powerful..... [Designed by David A. Johnson] |
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5 Lamp/ LED Flash Driver - (schematic added 09/08) |
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555 timer drives multiple LEDs from one NiMH cell - 2-Oct-08 Issue of EDN
Using a CMOS 555 timer, you can drive seven high-brightness LEDs from a single 1.25V
cell..... [Design Idea by Chuck Irwin, Hendersonville, NC] |
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555 timer eliminates LED driver’s need for microprocessor control - 3-Sep-09
Issue of EDN A timer provides programming pulses for lower cost than a
microprocessor..... [Design Idea by Michael Day, Texas Instruments, Dallas, TX] |
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5x5x5 LED cube - This month's featured Gadget Freak is provided by an old
favourite of the blog, Peter Griffiths. He shares all the details necessary to build
your own 5 x 5 LED cube… |
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5x7 Display - Sit back and take a big breath. You are about to take part in
one of the best microcomputer (microprocessor) projects you have seen. It uses a
PIC16F84 micro and you will be shown how to program the chip to create quite amazing
effects. It's a simple project and you will be starting at the beginning of
programming, so don't worry if you have never worked with a microprocessor
before.....(added circuit 05/07) |
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