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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)

Digital Camera Subs as a Scope Camera - 12/09/99 EDN Design Ideas /  (added 11/05)

Digital cameras AGFA, Olympus to PC COM cable pinout - (schematic diagram added 2/07)

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)

Digital Clock - Scroll down to find link to circuit drawing and circuit explanation….(electronic design added 09/06)

Digital Clock with Timer and 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.... (added 2/07)

Digital Combination Lock - (schematic added 9/02)

Digital Compass - (electronic diagram added 6/03)

Digital countdown timer may never need battery replacement - 06/23/05 EDN Design Ideas  / (added 6/06)  Processor-based timer draws microamps.

Digital Current Source is Nonvolatile - 05/(07/02 EDN Design Ideas  /  (added 1/05)  Digitally programmable current sources that feature automatic trimming and retain the setting despite power-down cycles are useful in applications such as RFand 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....

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)

Digital Dialer - (electronic circuit added 4/05)

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)

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)

Digital Down Conversion theory - (added 5/08)