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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 |
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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 |
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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 |
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AN-1127: LVDS Display Interface - National Semiconductor
Application Note |
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AN-1237: Rsds™ Flat Panel Display Design Guidelines Part 2
- National Semiconductor Application Note |
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AN-378: A Novel Process for Vacuum Fluorescent VF Display
Drivers - National Semiconductor Application Note |
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AN-990: Radiated Emissions & CRT Displays - National
Semiconductor Application Note |
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Animated LED Signboard PIC16C84 |
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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. |
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Call Sign Annunciator |
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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
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