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Delay line has wide duty-cycle range - 27-Jun-02 Issue of
EDN Today's digital delay lines can process pulses no shorter
than their delay times, and that restriction confines the
devices to applications in which the duty cycle remains near
50%. A limited range of available delays (2 to 100 nsec per tap]
further limits their use. Longer delay is available with
one-shot multivibrators of standard digital-logic families, but
those devices do not retain duty-c..... [Design Idea by John
Guy, Maxim Integrated Products, Sunnyvale, CA] |
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Delay Line Implements Clock Doubler - 07/18/96 EDN-Design
Ideas..... EDN is migrating links. This link is not verified.
Search the "title" + "EDN" for new link. |
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Delay line upgrades vintage scope - 18-Apr-02 Issue of EDN
Vintage triggered-sweep oscilloscopes find use in many
applications. However, they have no internal delay line, so they
can't display the pulse that triggers the sweep. Moreover, early
laboratory scopes contain delay lines having insufficient delay
to display such pulses during a uniform portion of the
sweep..... [Design Idea by Robert Houtman, Blaine, WA] |
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Delay Simulator Debugs Communications Equipment - 10/27/94
EDN-Design Ideas..... Phone calls over satellite circuits
experience a ¼-sec transmission delay in each direction. The
low-cost circuit (around $20]in Fig 1a simulates this delay and
provides hooks for inserting noise, echo, and other..... EDN is
migrating links. This link is not verified. Search the "title"
+ "EDN" for new link. |
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Delayed DC Power - This circuit Creates a Tiny Power Delay
to a Circuit. Read Why I designed it. |
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Delayed Interface to Kodak DC-20 Camera - designed by Jon
Fick |
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Delayed Off Light Switch#REF! |
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Delayed Shutter Control for Kodak DC-20 |
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Dome light dimmer (with delay) - For all you guys out there
that want a fading dome light (aka courtesy light aka theatre
lighting) without having to pay for one, you can build your own.
I have attached the schematics and you can build it for a few
bucks given that you don't have any spare components lying
around otherwise it can cost you absolutely nothing. Of course
you can rip some parts from your TV, CD player, radio, etc., but
I'm not responsible for the damage you cause this way
[b:e43bc460fa]The way it works[/b:e43bc460fa] I won't bother you
with technical.... |
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Feedback circuit eliminates CCD-driver delay mismatch -
18-Sep-03 Issue of EDN In a CCD (charge-coupled device],
packets of charges shift across the array. The transistor array,
also called a bucket-brigade shift register, receives drive from
a dual-phase clock signal. Dual-phase clock signals comprise two
synchronized clock signals that are 180° out of phase. High
peak-output-current CCD drivers can buffer the logic-level clock
signals and turn them into high-voltag..... [Design Idea by Mike
Wong, Intersil-Elantec, Milpitas, CA] |
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Generating a Delayed Pulse With a dual 555 Timer - The
circuit below illustrates generating a single positive pulse
which is delayed relative to the trigger input time. The circuit
is similar to the one above but employs two stages so that both
the pulse width and delay can be controlled. When the button is
depressed, the output of the first. |
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Generating Long Time Delays - Generating long delays of
several hours can be accomplished by using a low frequency
oscillator and a binary counter as shown below. A single Schmitt
Trigger inverter stage (1/6 of 74HC14) is used as a square wave
oscillator to produce a low frequency of about 0.5 Hertz. The
10K resistor in series with the input (pin 1) reduces the
capacitor discharge current through. |
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Group Delay Equalizer has Gain More Than One - 10/12/95 EDN-Design
Ideas EDN is migrating links. This link is not verified. Search
the "title" + "EDN" for new link. |
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High & Low Voltage Cut Off With Time Delay - The power line
fluctuations and cut-offs cause damages to electrical appliances
connected to the line. It is more serious in the case of
domestic appliances like fridge and air conditioners. If a
fridge is operated on low voltage, excessive current flows
through the motor, which heats up, and get damaged. |
