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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. |
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16x16 LED Matrix & Driver |
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2 Wire LCD Interface using PIC16cf84 |
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20 dB Amplifier & High Current Balanced Line Driver - AS023
Jenson Transformer Application Note |
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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 |
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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 |
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5301 Wideband Fuel Mixture Display |
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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. |
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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. |
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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 source code 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 |
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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] |
