PIC 5x7 Display
- . . . [Prepared by Colin Mitchell]
Picxie
2 8x8 Animated LED Signboard - The firmware supplied
incurrent 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!UsesPIC16F84. . . . [Lewin A.R.W. Edwards]
Pin Diode Drivers
- Application Note 02 Mar1999 /. . . [National Semiconductor]
Pocket Ignignokt LED display
- By now everyone's heard about the 2007 Boston Mooninite Scare. Unfortunately, as far as I know, no one has
put any thought into mass producing more of these guys. Well, no more. Thom, a now-buddy of mine from Chicago,
emailed me after he saw my Superbowl party window decoration to tell me that he thought it would be awesome to
design a Mooninite PCB that could be built cheaply enough to be used as a throwie. So here it is. . . . [© 2007
by Riad S. Wah[by]
Potentiometers Enable Programmable Biquadratic Filter
- 07/22/04 EDN Design Idea Of the many types of analog filters available to
designers, few allow easy adjustments of the filter parameters. The biquadratic, or biquad, filter is an
exception, however. You can change that filter's corner frequency (ω0) , Q, and gain (H) by adjusting the values
of three resistors. For that purpose, the lowpass biquad circuit of Figure 1 includes three digital
potentiometers configured as variable resistors in the feedback loops. Altering the settings of these
potentiometers changes the filter characteristics. . . [by Deborah Mancuso and Donald Schelle, Maxim Integrated
Products, Sunnyvale, CA]
Power Supply for
Digital Panel Meters that is Isolated - Many
inexpensive digital panel meters, such as the one shown below, are designed to operate from a 9v battery.
However, the nature of the panel meter internal design often requires that the DC supply used to power the device
be isolated from the ground . . . [Hobby Circuit designed by Dave Johnson P.E., 09/13/08]
Power-supply IC drives multiple LEDs
- 09/02/04 EDN Design Idea Bright LEDs are becoming prominent sources of
light. They often have better efficiency and reliability than do conventional light sources. Although LEDs can
operate from an energy source as simple as a battery and a resistor,. . . [by John Lo Giudice and Vee Shing
Wong, STMicroelectronics, Schaumburg, IL]
Programming Fun Lights With TI's TCA6507 - Texas
Instruments provides a broad portfolio of high-performance products for your LED design needs. From RF and power
management (including AC/DC, Power Factor Correction, DC/DC and linear power conversion) to DSPs and
ultra-low-power MCUs, TI has products to differentiate your design. And, TI's local support and applications
expertise can help you get to market faster. . . . [Texas Instruments App Notes, 30-Nov-07]
Provide High-Side Current-Sensing for White-LED Drivers
- 02/19/04 EDN Design Idea White LEDs find wide use in backlighting
color-LCD screens in most portable devices, such as cellular phones, PDAs, and MP3 players. Multiple LEDs often
connect in series to ensure that the same current flows through every LED. To . . . [by Dimitry Goder, Sipex
Corp, San Jose, CA]
Quad Output Switching Converter Provides Power for Large TFT LCD Panels
- DN349 Design Notes (Linear Technology) . . . [Linear Technology]
Quad Output TFT-LCD Power Supply: 12.2V AT 500mA,
3.3V AT 2A, 35V AT 30mA,-5.5V AT 50mA - The LT1943
integrates 4 high efficiency switching regulators to provide 4 high power outputs for biasing TFT-LCD displays:
12. 2V AT 500mA, 3.3V AT 2A, 35V AT 30mA, -5. 5V AT 50mA. . . [Linear Technology App Note - , Mar 24th 2010]
Radiated Emissions & CRT Displays
- Application Note. . . [National Semiconductor]
Read isolated digital signals without power drain
- 11/25/04 EDN Design Idea Although optocouplers offer designers a
straightforward method of establishing galvanic isolation between circuits that operate at different ground
potentials, they do not provide an ideal approach. An optocoupler draws power from . . . [by Alfredo H Saab and
Joseph Neubauer, Maxim Integrated Products Inc, Sunnyvale, CA]
Reconstruction Filter Selection for HDTV & VGA/Application/ ABR-42015
- Fairchild App Note - . . .
Remote Controlled Sign
- A SHORT COURSE in three designs to learn how to use Nutchips from ground
up. You will start making LED flashes. You will continue learning how to switch outputs with separate START and
STOP buttons. In the last instalment, you will learn how to remotely switch a light on and off. . . . [Projects
& Ideas from Nutchip.com]
Remote display
- On this page, I will introduce remote display with PIC16F873.The
asynchronous communication function (USART) of PIC16F873 is used for this equipment. The information which is set
with the control unit is displayed on the large-sized display installed in the about 10-m left place using the
cable. The size of the displaying unit has 25-cm height, 40-cm width. It is not so large size. . . [Seiichi
Inoue's Web Site]
RGB to YPBPR Component-Video Conversion
- Figure 15 shows a method of generating the standard definition
YPBPR signals from an RGB source using a pair of LT6550 triple Amplifiers. It should be noted that to ensure Y
includes a correct sync, correct syncs should be present at all three inputs or else added directly at the Y
output gated 8. 5mA current sink or 350Ω. . . [Linear Technology App Note - , Mar 25th 2010]
RGB Video Inverter
- This circuit is useful for viewing photographic negatives on video. A single
channel can be used for composite or monochrome video. The inverting Amplifier stages are only switched in during
active video so the blanking, sync and color burst (if present) are not disturbed. To prevent video from swinging
negative, a voltage. . . [Linear Technology App Note - , Mar 25th 2010]
RS232c Line Driver IC Drives Power MOSFETs
- 10/24/96 EDN Design Idea Easy to affect an interface between power MOSFETs
and TTL circuits. . . [by Santosh Shetty, NCRA, Pune University, Pune, India]
RSDS™ Flat Panel Display Design Guidelines
Part 1 - Application Note. . . [National Semiconductor]
RSDS™ Flat Panel Display Design Guidelines
Part 2 - Application Note. . . [National Semiconductor]
Running
Message Display - This is a circuit that can display a
running message on a LED arrangement by using a Johnson decade counter. . . . [© EFY Enterprises Pvt. Ltd. All
rights reserved.]
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