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µP Displays 10 Bit Data on Three LEDs - 11/07/96 EDN-Design
Ideas.....circuit in Figure 1 uses a PIC16C55 µP to read 10-bit binary
data and directly display data in decimal format on three
common-cathode LED displays. If value of data exceeds 999,
displays show three hyphens (---) to represent overflow. PIC16C55
has high drive..... [Design Idea by Yongping Xia, Philips Lighting
Electronics, Torrance, CA] |
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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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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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A Novel Process for Vacuum Fluorescent VF Display Drivers -
National Semiconductor Application Note (app note added 2/06) |
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Air display - A Noisemaker without noise. A simple rotating display.
Just spin and enjoy. While the "Air display" is rotating, it writes the message on the
air. Because the "persistence of the vision", you will be able to read the message.
Circuit, see JP6293E.gif. Download the HEX file, Program the PIC with JP6293E.hex.
Algorithm, Build your own Air Display using code.txt.....(electronic design added
06/07/08) |
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AN-1127: LVDS Display Interface - National Semiconductor Application Note
(app note added 2/06) |
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AN-1237: Rsds™ Flat Panel Display Design Guidelines Part 2 - National
Semiconductor Application Note (app note added 2/06) |
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AN-378: A Novel Process for Vacuum Fluorescent VF Display Drivers -
National Semiconductor Application Note (app note added 2/06) |
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AN-990: Radiated Emissions & CRT Displays - National Semiconductor
Application Note (app note added 2/06) |
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Animated LED Signboard PIC16C84 - (electronic circuit added 4/05)
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Big 7-Segment LED Display Board with SPI Interface - The circuit uses a
serial-in-parallel out shift register, 74HC595 for receiving serial data from
uController board. See example of U5 in schematic, SER is for data input, SRCLK
is shift clock and RCLK is Latch clock. Each data bit is shifted into register
on rising edge of shift clock. When all data bits are shifted into 8-bit
register, rising edge of RCLK will clock data to be latched at each output
bit, i.e. QA QH.....(added 4/05) |
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Call Sign Annunciator - (electronic circuit added 4/05) |
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Circuit Thermally Compensates LCD Contrast Bias - 03/16/95 EDN-Design
Ideas..... EDN is migrating links. This link is not verified. Search the "title"
EDN for new link. |
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Connecting AT90S2313 with LCD Display 2x16 Char & 4x4 Keypad - (electronic
circuit added 4/05) |
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