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Digital  / Logic Circuits 
Display Circuits:  #'s - C       D - I       J - N       O - T       U - Z

Last Updated on: Wednesday, November 29, 2017 05:38 AM

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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
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VA3TO Programmable Beacon Keyer - This article describes a simple programmable Morse Code Continuous Wave (CW) beacon keyer that can be built for less than $15. While older designs had the message hard-coded in a diode matrix or EPROM and other so called "programmable" designs require you to alter the microcontroller code or use some other clumsy method to change the message, this keyer design offers a much simpler programming interface using a PC. The board can be temporarily connected . . . [from Rob Paisley's Model Train web site]

 

VCOM adjustment uses any logic-supply voltage - 09/30/04 EDN Design Idea   All TFT (thin-film-transistor] LCD panels require at least one appropriately tuned VCOM signal to provide a reference point for the panel’s backplane. The exact value of VCOM varies.  Page includes several designs. Scroll to find t. . . [by Peter Khairolomour and Alan Li, Analog Devices, San Jose, CA]

Versatile digital speedometer uses few components - 05/12/05  EDN Design Idea   Microcontroller, display, and sensor form digital speed readout. . . [by Abhishek Jain, Netaji Subhas Institute of Technology, Dwarka, New Delhi, India]

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Versatile Digital Vector Generators - File contains several designs, please scroll to find this circuit. . . [Analog Devices-Analog Dialogue by McDonnell, Dennis]

 

Versatile Programmable Amplifiers using Digital Potentiometers with Nonvolatile Memory - AN-579 Analog Devices App Note - . .

 

Very Basic Logic Circuits - . . .

 

VF Control of 3-Phase Induction Motors using PIC16f7x7 MicroControllers - Application Note Published 26-May-04. . . [Microchip]

 

Video Design Idea: Microcontroller drives 20 LEDs - 09/27/07  EDN Design Idea   Details and demonstrates the use of "Charlieplexing" to drive 20 LEDs using six available I/O pins on an 8-pin microcontroller. . . [by Dhananjay V Gadre of the Netaji Subhas Institute of Technology in New Delhi, India]

 

Video Digital Volt Meter - A digital volt meter that displays voltages on your TV screen, with both giant digits and an analogue bar display. Maximum and minimum peaks are displayed, too. Serial output for use as a data logger in conjunction with your PC. . . [Alberto Ricci Bitti]

 

Video DVM - A digital volt meter that displays voltages on your TV screen, with both giant digits and an analogue bar display. Maximum and minimum peaks are displayed, too. Serial output for use as a data logger in conjunction with your PC. . . [Alberto Ricci Bitti]

 

Video Genlock - PIC Project  In many cases, especially for video overlay operations, it is necessary to synchronize a PIC to some external event (such as horizontal sync pulses). This circuit uses only one extra part - a D-type flip-flop (such as a 74hc74). The PIC is configured to run an external RC oscillator but the normal pull-up resistor is connected to the output of the 74hc74. The external sync pulse sets Q high allowing the oscillator to run until the PIC sets RA, 0. . . [Luhan Monat - Mesa Arizona]

 

Video Intrusion - This device uses a PIC16F819 and an LM339 to detect motion on a video signal. The incoming video is 'clamped' using one section of the LM339, the sync tips are detected with another section, and a 3rd section can detect VBI or other data. . . [Luhan Monat - Mesa Arizona]

 

Video Processor - . . .

 

Video Switcher - Monitoring several cameras on one monitor is usually done in one of two ways: divide the screen into sections and show them all at once, or time sequence the cameras onto the whole screen. This device uses the second method (which, if you don't already know, . . . [Luhan Monat - Mesa Arizona]

 

Visible Laser Driver Has Digitally Controlled Power Modulation - App Note - / 228 / Mar-10. . . [Maxim Integrated]

 

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Digital or Logic Circuits:  #'s - C       D - G       H - M       N - R       S - T       U - Z


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