VU Meter Circuits and Projects

Here is a collection of web pages of VU Meter projects that helps a newbie getting into the Electronics DIY Hobby Land.

VU Meter Circuits and Projects

A Hobby now in your School days or College can help you build a strong profession later. It is Edutainment that will make productive use of your spare time. Friends can do it as a group, during holidays. Parents should encourage healthy hobbies, as the children will grow in a positive and creative atmosphere.

Stereo led level meter – This is it. It’s a STEREO LED LEVEL METER. It’s the cheapest and best bar graph display available and best of all, it uses readily available components.

VU-meter by Archy – Then it hit me. A VU meter, big, beautiful, professional! From that moment started my thoughts flowing. Those VU-meter ICs that are sold in every electronics shop?

LM3914 dot-bar display driver – The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display.

Knight Rider Display Project – This project started out as a VU meter. I reused parts and pieces to improve the VU meter and give it additional functionality. It is amazing how much time it takes to create a small thing like this.

18 LED dimmable LED lamp

Build it or go for a kit, this is a nice design for a Table or Desktop lamp. You will need to fix in a Enclosure with a Diffused Plastic or Glass Filter Front.

18 LED dimmable LED lamp

18 LED dimmable LED lamp

This circuit is a dimmable white LED lamp array with 18 LEDs. The lamp brightness is regulated as long as the input voltage is above 10.5V. A low-dropout analog voltage regulator is used for a simple and relatively efficient design. The lamp produces enough light to use as a a reading lamp or a small work lamp. – G. Forrest Cook

The 12V DC input voltage is routed through the 1A fuse and the on/off switch. The 1N4001 diode acts as a crowbar device. If reverse polarity is applied, the fuse will blow and the rest of the circuitry will be protected. Power is sent to the LM2941CT voltage regulator IC.

Power this project from sunlight with a CirKits solar power circuit board kit.

Christmas Tree – CircuitStew

The true Christmas Spirit is in giving, You can only give if you have something, right. You can Have when you Acquire Skills, Imagination and a Cheerful Attitude.This will help you Create Things! – dapj

Christmas Tree - CircuitStew

Develop a Skill this Christmas, Build these small LED Trees and give it to people who need a little bit of cheering up.

Christmas Tree – CircuitStew “This was the first and last complete prototype that I made on proto board. This style of prototyping produces circuits that are very difficult to understand, debug, and modify. Because of all the extra work involved they also take forever to assemble. Suddenly I became very interested in designing and fabricating custom pcbs….”

The name CircuitStew refers both to the jumble of electronics presented here and to circuit boards suspended in neon green copper etching solution. – Derek Wolfe

Build Holiday Electronics Projects

“This Christmas, Make and Give to someone that needs it most. That is the real spirit.” – dapj

micro-readerboard Christmas tree ornament displays a short message, one letter at a time, on a bright single-character alphanumeric LED display. In the animation here, the ornament is displaying the word ornament.”

Each ornament is pre-programmed with a list of 36 different short phrases. Every time that an ornament is switched off and back on, it picks a new message from its memory to repeat.

Holiday Projects –

Holiday (Fun Circuits)
25 Light Sequencer using Xmas Lamps – drive 25 small Xmas lights. The lights operate at about 200mA and 3 volts, Anti-Flicker Circuit for LED Christmas Lights. Bells ring Generator –  Three circuit options; Can be synchronized to Christmas tree flashing lights.

Christmas related Circuits – Christmas Flashing-LEDs Badge –  Two-LEDs follow the rhythm of music or speech. Suitable for pins, badges, Christmas decorations. Programmable LED Flashers LED goes to steady state after a preset number of flashes Two simple, wide supply range operating circuits

Christmas Decoration Project
This project flashes 18 LEDs at three different rates and you can use these to create an eye-catching Christmas Decoration. The circuit is kept simple (and low cost) by using the 4060B IC which is a counter and oscillator (clock) in one package.

Ready Kits –

ApogeeKits flashing Christmas tree

Christmas Season Electronic Animated Display Kits
ApogeeKits flashing Christmas tree electronic kit makes a beautiful lighted holiday display. 12 multi-colored LEDs flash randomly. May be powered by a 9 volt battery or a DC power adapter for long term continuous use. User assembly of components and soldering is required.

Grantronics Christmas Tree
“Last November, we published the very popular Christmas Star. This year, our “just for fun” project is in the shape of a tree but we have gone one step further by using bi-coloured LEDs. There are many different light patterns and each LED can produce 16 different colours.”

LED Christmas tree – Learning Electronics

Letter from Chris of PyroElectro.com in 2013 – Happy Holidays!

Here’s a project I know your readers will love! It’s an all-digital-hardware LED Christmas tree we’re calling the Christmas Tree O’Digital Logic.

The tree itself is composed of 64 LEDs built into a spiral sitting on a piece of protoboard. Underneath, the controller uses shift registers and a 555 timer to create two modes of display: a predictable pattern and a random pattern. This should light up any desk or shelf and bring merriment to your readers!

LED Christmas tree - Learning Electronics

We’re also running a Kickstarter campaign to fund our second free online electronics course, “An Introduction To Digital Electronics.” We have just 4 days left to raise $2,124. If you would be so kind as to spread the word about our efforts, we’d be extremely grateful!

To build the tree, we’ll use 63 green LEDs and 1 red LED. Lots of wire will be needed to make the spiral + cone shape of LEDs from top to bottom. To build a random pulse generator, we’ll use some digital logic trickery with a 7404 hex inverter. A 555 timer will be used to drive 8 shift registers, which will control all 64 of the LEDs. Finally, a 4 bit timer should be thrown into the circuit in case we want to slow things down with a divider.

Electronic Solar Umbrella

There are places like your Backyard, outdoors, a village… where your Gadgets will stop working !!!

You will feel suffocated when your Smartphone or Tablet fails to respond to your caring strokes. Your Dupey is perishing due to Undernourishment. All you need is “Electronic Solar Umbrella” which was invented by me delabs on June 1st 2014.

Electronic Solar Umbrella

The Red Light is for Data Networking SmartUmbrellas using Advanced Multi-Threaded Infra Red Technology.

SUN – Smart Umbrella Networking

I just invented the SmartUmbrella – My Drone is Rushing to the Patent Office.

(Keep this confidential till my drone returns safely, the beagle boys are using Blimps with Large Magnets to capture Drones.)

Bicycle Light Projects

Bicycle Light Projects

Constructing or modifying a bicycle lighting system should be done carefully to enhance the lighting and not displace a minimum lighting that is needed for safety.In rural areas and mountain bikes more lighting may be needed.

Dynamo LED light electronics – A nice selection of electronic circuits to power LEDs from a bicycle dynamo

Battery LED light electronics – A basic step-up circuit to power an LED from a battery

  • Universal single-LED headlight
  • Universal triple-LED headlight
  • Universal LED taillight mechanical construction

High-power halogen headlight

High-power halogen headlight from standard parts, battery-operated

  • Lots of light for your money
  • All standard parts, easily completed in half a day