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Versatile CMOS
/TTL Logic & Clock Probe - For fault diagnosis of any logic circuit, you need a probe that can test the logic level or existence of clock activity. The circuit shown here can be used to test...__ Electronics Projects for You
Versatile digital speedometer uses few components - 05/12/05 EDN-Design Ideas Microcontroller, display, and sensor form digital speed readout Design by Abhishek Jain, Netaji Subhas Institute of Technology, Dwarka, New Delhi, India
Versatile LED/Lamp Flasher - The LM3909 was a legendary IC, which the designers (National Semiconductor) modestly described as a "LED Flasher/Oscillator". Its popularity was surely due both to its great simplicity and versatility. It could flash a LED off a wide range of voltages, at a wide range of frequencies. It could also flash LEDs in parallel, could produce a tone in a loudspeaker, trigger a TRIAC or pulse an incandescent bulbamong other things. Sadly, though, the LM3909 has been discontinued and is now very difficult to find.__ SiliconChip
Versatile Micropower Battery Protector - Protect your expensive batteries from discharge damage with this mini-sized electronic cutout switch. It uses virtually no power and can be built to suit a wide range of battery voltages.__ SiliconChip
Versatile Special Function Timer - This automatic timer has a wide range of applications whereby a timing cycle is initiated in response to a trigger signal. There are quite a few uses for it in a car or you could use it on a model railway layout, in a home security system or whatever.__ SiliconChip
Very Basics Circuits - This column is intended to be a place to find really basic information on subjects related to robotics and electronics. If you have questions about the basics on these subjects, this column is for you. I invite you to submit questions or information to this column __ Designed by Kevin Ross
Very Bright, Very Cheap Krypton Bike Light - Be seen at night with this fantastically effective bike headlight. Its cheap to build and can run from a variety of power supplies__ SiliconChip
Video Design Idea: Microcontroller drives 20 LEDs - 09/27/07 EDN-Design Ideas Details and demonstrates the use of "Charlieplexing" to drive 20 LEDs using six available I/O pins on an 8-pin microcontroller Design by Dhananjay V Gadre of the Netaji Subhas Institute of Technology in New Delhi, India
Video Digitizer-MkI - This frame grabber design digitises pictures to very high quality in monochrome (8-bit black & white) . Although designed for the European standard 625-line / 50Hz TV system, it should work with the American 525-line / 60Hz standard with minimal modification. __ Designed by W.A. Steer PhD
Video Digitizer-MkII - A "video-digitiser" (also known as a "frame grabber") captures television pictures from a TV set, camera, or video recorder, etc., and forwards them to a computer for display, storage, or general manipulation. This document describes a home-built digitiser which interfaces to an EPP (or bi-directional) parallel port on IBM PCs. __ Designed by W.A. Steer PhD
Video Enhancer & Y/C Separator - Sharpen the pictures from your video tapes with this great project. It's just the shot when trandferring your tapes to DVD'S and it converts composite video to S- Video as well, to ensure a high quality transfer.__ SiliconChip
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 parta 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. __ Designed by Luhan Monat, Mesa, AZ
Video Motion Detection - 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. __ Designed by Luhan Monat, Mesa, AZ
Video Processor - Circuit Only __ Designed by Stephen Edwards
Video Reading Aid for Vision Imparied People - It uses a small CMOS
TV camera to produce enlarged positive or negative image with boosted contrast__ SiliconChip
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. __ Designed by Luhan Monat-Mesa Arizona
Video-Audio Booster for Home Theatre Systems - Having problems with long cable runs? This unit can boost both composite and S-video signals, or even component video signals. And it boosts stereo audio signals as well.__ SiliconChip
VideoSCope - An easy-to-build combination Video Camera and Microscope!__ SiliconChip
Voice Synthesizer - This system was designed to facilitate the development of a low cost speech module using a PIC and some EEPROM memory. This has already been done (see PICTalker) using 64k of memory. So far, this device is working with only 11k of memory by using techniques discussed below __ Designed by Luhan Monat-Mesa Arizona
Voice-storage chips talk to each other - 11/05/98 EDN-Design Ideas - (Several circuits here, scroll to find this one) Of the many solid-state voice-storage chips available, the ChipCorder family from Integrated Storage Devices (ISD, San Jose, CA] is one of the most user-friendly. A single chip integrates nonvolatile voice memory, a microphone preamplifier, and an output stage capable of driving a 16 Ohm loudspeaker Design by Jerzy Chrzaszcz, Warsaw University of Technology, Poland
Voltage indicator - The solidstate voltmeter circuit described here indicates the mains voltage with a resolution that is comparable to that of a general-purpose analogue voltmeter. The status of the mains voltage is available in the form of an LED bar graph__ Electronics Projects for You
Voltage Interceptor for Cars with ECUs - At one time, the sensors in cars with engine management were regarded as untouchable. But now you can change the signal response of many of the sensors to improve your car's driveability, throttle response, handling and so on. This voltage interceptor allows you modify and program the response of any voltage sensor in your car, without prejudicing reliability or affecting the ECU in any way. Use it for restoring correct air/fuel ratios after engine modifications, preventing turbo boost cuts or altering sensor signals for improved driveability.__ SiliconChip
Voltage Regulator goes Digital - 11/24/99 EDN-Design Ideas Power consumption and failing batteries are key issues in battery-operated applications. Features in the new generation of series voltage regulators address these concerns. For example, National Semiconductor's LP2951 micropower voltage regulator provIdeas a logic-level output signal indicating a low regulated Design by Chuck Wojslaw, Xicor Inc, Milpitas, CA
Volume Control - This digital volume control has no pot to wear out and introduces almost no noise in the circuit. Instead, the volume is controlled by pressing UP and DOWN buttons. This simple circuit would be a great touch to any home audio project. __ Designed by Aaron Cake
Volume Control has Log Taper - 04/11/02 EDN-Design Ideas Digital potentiometers provide a compact and convenient way to attenuate audio-amplifier signals. However, most such potentiometers suffer from at least one flaw a nonlogarithmic step increment. To avoid this problem, a user must usually step the potentiometer in a nonlinear sequence to simulate a logarithmic taper Design by Doug Farrar, Los Altos, CA
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