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15x7 Display - This project is what you have been waiting for. Remember the
scrolling signs you see in shops and on advertising billboards? Now you can program
your own moving sign with all the effects you can think of. We have provided a blank
canvas in the form of a scanning screen 15 LEDs by 7 LEDs and on this you can
put anything you like. Of course this is not a two-day job. You have to learn how to
program.....(design added 04/09) |
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16x16 LED Matrix & Driver - (circuit added 9/04) |
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2 Wire LCD Interface using PIC16cf84 - (schematic / Circuit design added
9/02) |
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20 dB Amplifier & High Current Balanced Line Driver - AS023 Jenson
Transformer Application Note (app note7/02) |
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2-Way Multiplexed LCD Drive & Low Cost A/D-Converter using V/F Techniques with COP8
MicroControllers - National Semiconductor Application Note (app note
added 2/06) |
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3-Colour Display using Bicolour LEDs - ..... |
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4 Channel Timer using Atmel 89C4051 & MAX7219 display Driver - using Atmel
89C4051 and MAX7219 display Driver (circuit / schematic design added 7/06)
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5301 Wideband Fuel Mixture Display - (circuit / schematic design added 6/06)
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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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7 by 10 LED Moving Sign 27c512 Eprom - This sign I designed uses no
microprocessor. It has an eprom and multiple counters. As in most electric signs, the
LEDs are matrixed, and strobed very quickly….(electronic circuit added 4/05)
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7 Segment LED Counter (Aaron Cake) - This simple counter can be used to
count pulses, as the basis for a customer counter (like you see at the doors of some
stores), or for anything else that may be counted. The circuit accepts any TTL
compatible logic signal, and can be expanded easily (see Notes)..... |
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72 LED Clock - In the circuit above, 60 individual LEDs are used to indicate
the minutes of a clock and 12 LEDs indicate hours. The power supply and time base
circuitry is the same as described in the 28 LED clock circuit above. The minutes
section of the clock is comprised of eight 74HCT164 shift registers cascaded so that a
single bit can be recirculated through the 60 stages i..... [Bill Bowden] |
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7-Segment Display - This experiment is more of an introduction to the 4511
decoder/display driver IC than it is a lesson in how to "build up" a digital function
from lower-level components. Since 7-segment displays are very common components of
digital devices, it is good to be familiar with the "driving" circuits behind them,
and the 4511 is a good example of a typical driver IC(circuit add 6/07) |
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7x7 Monochrome LED Display - This is an easy to build 7x7 led matrix. You
can use it as a casebadge, for example. The device comes to it rights the most when
showing animations. See 7x7led.avi for a short movie showing a rotating torus. As you
can see the schematic is quite simple. An AVR, a few transistors, com resistors and
some logic to convert RS232 to TTL. [b:d36eaf5672]Features[/b:d36eaf5672] 7x7 led
matrix 127 grades of brightness per led Interface to PC: RS232 Microcontroller:
ATTiny2313. License: GPL [b:d36eaf5672]Construction[/b:d36eaf5672] Let's start with
the led-array. Best is to build it row by.... |
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8x8 Animated LED Signboard - The firmware supplied in current
sourcecode archive is VERY BASIC. I do intend to draw more patterns. However, a vast
workload coupled with possible emigration has put finished firmware on hold.
Please do go ahead and build this circuit though supplied firmware is fully
functional. You can have hours of fun designing your own patterns and effects!
Uses PIC16F84 (project added 10/06) |
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9 Second Digital Readout Countdown Timer - This circuit provides a visual 9
second delay using a 7 segment digital readout LED. When the switch is closed, the
CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output
held high. When the switch is opened,… [Bill Bowden] |
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