Monday, June 23, 2008
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.
Adafruit Industries - Unique DIY electronics
All the projects are redesigned specifically to make it easy for beginners to make: nicely silkscreened circuit boards, through-hole parts whenever possible, extra large solder pads, etc. For some kits, you can purchase just the circuit board. To save paper, the easy-to-follow-with-lotsa-pictures instructions are all available
- Designed to plug into a breadboard for easy prototyping
- Petite size, only 3" x 0.8" (75mm x 20mm)
- All 'standard' pins are brought out - Digital 0 thru 13, Analog 0 thru 5, ARef, 5V, Ground, Vin and Reset
- Chip comes preprogrammed with a "no-wait" Arduino bootloader
- 2 LEDs, green power and red "pin 13" just like the Arduino Diecimila
- Available as a low cost kit with standard parts, so its never out of stock
- All through-hole parts are easy to solder
Sunday, June 22, 2008
This is versatile development board for AVR microcontrollers ATmega48/88/168. It is good for testing and debugging embedded programs. It has many built-in peripheries connected to microcontroller so you can use them without soldering. ATmega microcontrollers are produced by ATMEL and they include a lot of features: I/O, Timers, PWM generators, ADC, RS232, TWI, SPI, Analog Comparator, Oscillator, EEPROM… These microcontrollers are very versatile, easy to program and easy to use. This is the reason why I like these microcontrollers and why I decided to make development board for them.
Play-Hookey - Online Classroom
Digital logic is at the core of all digital computers, and yet it is entirely based on three fundamental operations, designated AND, OR, and NOT. See how it's possible in these pages…..
These pages now include coverage of the major logic families as well as some practical experiments that you can perform with real components to see for yourself how they work.
- DC Electronic Theory.
- AC Electronic Theory.
- Op Amps and Analog Circuits.
- Take a look at optics.
- What's inside these semiconductors?
Line Clock - Play-Hookey
"In many digital circuits, we need a regular and continuous train of pulses to control the timing of various circuits. In some cases, we want two separate pulse trains, one the inverse of the other. In other cases, we may want two square wave pulse trains in quadrature...."
(An Excellent Interactive Resource, Technically Accurate, Electronics Edutainment - delabs)
Thursday, June 19, 2008
Danish Audio ConnecT - Denmark
Back in 1995, the first DACT product was the well-know CT1 and later CT2 stepped attenuator, which still today remain the single most recognized state-of-the-art audio volume control.
The CT100 is a two-channel phono preamplifier module with very accurate RIAA equalization and many features. It is realized with the best semiconductors available and non-inductive, low noise, SMD metal film resistors. The circuit is designed to accept both moving coil (MC) and moving magnet (MM) transducers/cartridges directly in order to eliminate the need for an external MC step-up transformer or amplifier. MC/MM input loading and input nominal level values are easy to select with high resolution by DIP-switches.
Danish Audio ConnecT A/S
Skannerupvej 14, DK-6980 Tim, Denmark.