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Digital Call Sign Annunciator - (electronic circuit added 4/05)
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Digital Camera Interface - project shows how a CMOS ‘Camera On a
Chip’ image sensor can be interfaced to an XSA-100 Board through an I2C
bus. The pixel data is buffered in the XSA-100 SDRAM and is then uploaded
through the parallel port to be displayed on a PC. (added 4/02)
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Digital Camera Subs as a Scope Camera - 12/09/99 EDN-Design
Ideas.....A digital camera can be a handy substitute for an oscilloscope
camera for older scopes that cannot output hard copy or digital data. A
digital camera provides instant results and allows you to easily enhance
the image and then add it to reports or Web pages..... [Design Idea by
Allen Moore, Redmond, WA] |
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Digital cameras AGFA, Olympus to PC COM cable pinout -
(schematic diagram added 2/07) |
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Digital Capacitance Meter (Elm-chan) - This is a simple
capacitance meter which can measure capacitance value easy. There are some
measurement methods for capacitance, at one time the capacitance was
measured with a impedance bridge or a dip meter….(circuit added 9/04)
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Digital Clock - Scroll down to find link to circuit drawing and circuit
explanation….(electronic design added 09/06) |
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Digital Clock with Timer & Solar Panel Regulator - This is a combination
digital clock timer and solar panel charge controller used to maintain a deep cycle
battery from a solar panel. The timer output is used to control a 12 volt load for a
32.… [Bill Bowden] |
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Digital Combination Lock - A multiple input combination loack using CMOS
counter IC's. Flexibility and code change is allowed by changing output connections.
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Digital Compass - (electronic diagram added 6/03) |
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Digital controller compensates analog controller - 19-Feb-09 Issue of EDN
Combine the simple and robust closed-loop control of the digital CLZD010 with the
current-limited high-side gate drive of the analog LM3485 for the best of the digital
and analog worlds..... [Design Idea by David Caldwell, Flextek Electronics, Carlsbad,
CA] |
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Digital countdown timer may never need battery replacement - 23-Jun-05 Issue
of EDN Processor-based timer draws microamps..... [Design Idea by Mark E Buccini,
Texas Instruments, Houston, TX; Edited by Brad Thompson and Fran Granville] |
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Digital current-source is nonvolatile - 7-Feb-02 Issue of EDN
Digitally programmable current sources that feature automatic trimming and retain the
setting despite power-down cycles are useful in applications such as RF- and
laser-communications drivers. The circuit in Figure 1, for example, is particularly
suited for setting the drive current for the optical pump in widely tunable VCSELs
(vertical-cavity surface-emitting lasers]..... [Design Idea by Stephen Woodward,
University of North Carolina, Chapel Hill] |
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Digital Delay Unit For Surround Sound - The Mitsubishi M65830 Digital Delay
IC has been discontinued (for reasons beyond my comprehension), and so far a suitable
replacement device has not been found. This means (of course) that you will be
unable to build this delay circuit. I have left the project in place as reference, and
the overall connection schematic is still valid if (when?) a replacement for the
M65830 is located. The project will be updated at that time. In the meantime, just
ignore the delay circuit.....(diagram added 2/07) |
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Digital Dialer - (electronic circuit added 4/05) |
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Digital Dimming DALI Ballast for 32w/T8 110V Input - This reference design
is a high efficiency, high power factor, digital dimming electronic ballast designed
to drive rapid start fluorescent lamp types. The design contains an active power
factor correction circuit for universal voltage input as well as a ballast control
circuit using the IR21592. The design also includes a PIC16F628 microcontroller and an
isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).
(added 3/05) |
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Digital Dimming DALI Ballast for 36w/T8 220V Input - This reference design
is a high efficiency, high power factor, digital dimming electronic ballast designed
to drive rapid start fluorescent lamp types. The design contains an active power
factor correction circuit for universal voltage input as well as a ballast control
circuit using the IR21592. The design also includes a PIC16F628 microcontroller and an
isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).
(added 3/05) |
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Digital Down Conversion theory - (added 5/08) |
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Digital Electronic Lock (Bill Bowden) - (electronic schematic / circuit
added 11/05) |
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Digital Electronic Lock circuitdb - The digital lock shown below uses 4
common logic ICs to allow controlling a relay by entering a 4 digit number on a
keypad. The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are
gated.....(added 05/07) |
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Digital Engine/Race Computer Board - The objective of this project is to
design a high speed digital engine tachometer. This requires the design and
development of a hardware and software solution to monitor the status of an engine in
real time. In addition, information relating to the overall health and systems of the
vehicle can be displayed. (added 10/05) |
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