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Versatile 4-Input Mixer - This low-cost 4-input mixer features low-noise input preamps, each of which can be configured to suit a wide range of signal sources: microphones, guitar pickups, tape decks, synthesisers or CD players. Other features include a built-in equaliser with bass, midrange and treble controls along with a monitoring amplifier which can drive stereo headphones.__ SiliconChip 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 bulb - among 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 Multi-Mode Timer - Versatile timer is based on an Atmel microcontroller and has seven different operating modes.__ SiliconChip
Versatile Timer IC - an 8-pin pic generating hourly/daily pulses, saves lots of circuitry - example circuits also __ Contact: P. Townshend - EduTek Ltd
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
Very Easy Single-Side PCB for Easy-Downloader V1.2 - Puiu Chiselita from Romania provides us a very easy single-side PCB with some modification for RS232 level converter and indicating LED. Puiu detailes how to make the board at home and gives some useful trick to making a board easier __ Designed by Wichit Sirichote
Very Easy Single-Side PCB for Easy-Downloader V2.2 - A variant single-side PCB of Easy V2.0 contributed by Puiu Chiselita from Romania. __ Designed by Wichit Sirichote
Very High IP3 Low Noise Amplifiers Cover 250MHz to 2300MHz - Application Note__ MiniCircuits.com
Victoria TAFE programmer (based on AT89C2051) - Schematic Only __ Designed by Peter Averill
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 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. __ Designed by Luhan Monat - Mesa Arizona
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 Arizona
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
Visual Basic & AVR RS232 interface - Control AVR micro-controllers via Visual Basic software. You can use some development board like MCU 100, STK200, STK500 or build your own board, following the schematic. __ Designed by Olesaether, Terie Frostad, Ingar Fredriksen, Morten W. Lund, Haakon Skar, Paal Kastnes
Visual BasIC 5 Projects - Here you will find my various Visual Basic Projects I have done. There is only one project up at the moment, but i hope to add more soon. The project is on how to control a relay with your PC. There is a unlimited number of possiblitlies you could do with this, turn on lights, TV, motors, etc. __ Designed by Shaun Wilson
Voice Recorder Module - Here's an improved version of the very popular voice recorder design we published in May 2005. It can now be set up easily to record two, four or eight different messages for random-access playback or a single message for 'tape mode' playback. Also, it now provides cleaner and glitch-free line-level audio output suitable for feeding an amplifier or PA system. It can be powered from any source of 9-14V DC.__ 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 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 Programmable Logic Element - Here's another daft yet interesting PIC12F675 idea I came up with. When I wanted to show someone how logic gates worked I could only find a NAND gate which wasn't very handy for demonstrating AND's OR's, NOR's and ExOR's. I also wanted to have a play with the A/D converter on the 12F675 so I came up with the idea of a PIC.
Voltage-to-pulse-width converter spares microprocessor's resources - 12/01/06 EDN-Design Ideas - Simple circuit uses only three components and two I/O-port pins Design by James Christensen, Kris Design Co, El Cajon, CA
Voltmeter & AM meter using PIC Microcontroller - Voltmeter and Ammeter can be easily made using PIC Microcontroller having ADC (Analog to Digital Converter) . I am using PIC16F877A and the result is displayed on an LCD Display. PIC16F877A is enough if you do this project only for testing purposes.
VU/Peak Meter with LCD Bargraphs - This easy-to-build bargraph VU meter makes it easy to record audio signals at the correct level. It shows both the average signal and peak levels in stereo on an LCD and you can adjust both the display range and number of steps. A digital display option is also available.__ SiliconChip |
