ELEKTRONIKA: 2006

Sunday, November 26, 2006

Control stepper motor through your computer's parallel port.

Buildan easy stepper motor driver that will allow you to precisely control aunipolar stepper motor through your computer's parallel port. The project comes with a program that has easy to use graphicalinterface, allows you to control the motor speed,...

Tuesday, October 03, 2006

It is late player MP3 with single chip of RHOM

It is late player MP3 with single chip of RHOM. It comprises controller 1.1/2.0, MP3 the decoder of USB, amplifier...

Wednesday, September 06, 2006

PCM2706 High Fidelity USB Soundcard / USB Headphones

This is a high fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac. It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC. It is a single chip digital-to-analog...

Sunday, August 20, 2006

4bit digital compass

Here's a nifty project I found off of Hackaday - how to build your own 16 point (4bit) digital compass. Instead of using the popular 3bit Dinsmore compass the author decided to build his own.The author attached a magnet to a reflective encoding...

Friday, August 18, 2006

Digital Voltmeter.

Build an inexpressive 0.1 - 199.9V LCD digital voltmeter that can be easily configured as amper and temperature meter. This module is based on a popular ICL7106 IC that can measure its own voltage supply...

Build BH1417 Stereo PLL FM Transmitter

This is the latest BH1417 FM Transmitter design from RHOM that includes a lot of features in one small package. It comes with pre-emphasis, limiter so that the music can be transmitted at the same...

Thursday, August 17, 2006

New TX200 transmitter with optional PLL and stereo encoder.

Here is the latest and greatly improved TX200 VFO/VCO FM transmitter. The most versatile transmitter to date that can be turned into high fidelity stereo PLL based 200mW FM transmitter. It is a perfect circuit for transmitting your music around the...

Friday, August 11, 2006

Open source MP3 player kits

Here are a couple open source MP3 player kits, PCB/schematics & source are all available - Li...

Wednesday, August 09, 2006

HOW TO - Make a wireless LCD

Max is on a roll, here he show you how to make graphic LCDs go “wireless” by using ACODE-300 bluetooth modules - Li...

Monday, August 07, 2006

RF-Condenser microphone circuit

Here's how to make a RF-Condenser microphone circuit that's similar to a Sennheiser MKH series mic, Uwe writes - "This RF-circuit is operating at 7.68 MHz and 48 V phantom power supplied. It is tested with a large diaphragm cardioid capsule from...

HOW TO - Make a HI-FI Stereo FM transmitter

Here's how to make a high quality stereo FM transmitter - "Whether you want to create your own radio station, transmit the music around the house, or simply create a wireless link between your iPod and a receiver in your car, this transmitter will...

Washing Microcontroller Timer

Did you ever face that, your washing m/c already run out the mechanical timer dial? After using for several times, the dial gir may worn out, and than it can not move anyhow. Many washing m/c shell in the market has mechanical controlled sequence...

Friday, August 04, 2006

New Schematics

USB and GLCD expansion board for 8051 SBC Victoria TAFE programmer (based on AT89C2051) Way small web server Wisp628 ISP Microchip PIC Programmer WLoader - PIC16F877 application loader / bootloader Zilog Z80 thermostat embedded web ser...

Monday, July 31, 2006

Controlling LED Arrays on TCP/IP Networks

The new Color LED matrix controllers from Spark Fun Electronics provide a fun way to control 8 x 8 color (RGB) LED matrices. Connecting directly onto a common cathode RGB 8 x 8 LED array, the controller "back pack" provides a simple serial interface...

Friday, July 21, 2006

Bingo!!! (on your tv)

This design is based on the video DVM and cronograph design. It supports color, so numbers not yet drawn (all but 1 and 87 in the picture on the left) are displayed in green and the others in white. White lines are ...

Wednesday, July 19, 2006

Rain detector

Rain Detector #1: Rain Detector ...

Friday, July 14, 2006

Good UHF Schematics

Good UHF Schematics CMOS Inverter VCO tunes octave to UHF: 11/19/98 EDN-Design Ideas UHF T Volt Preamplifier: ...

Sunday, July 09, 2006

Keypad Circuits

µC Provides Wireless Keypad Control: 10/08/98 EDN-Design Ideas 4 Bit µP`s a / D Converter Decodes Keypad`s Inputs: 10/13/94 EDN-Design Ideas 4 Digit Keypad: ...

Thursday, June 29, 2006

Fiber Optic

Simple CATV Upstream Fiber Optic Receiver Uses DC Pilot AGC: 01/20/03 Electronic Design - Ideas for Design / Upstream fiber links in a community antenna television (CATV) system are usually among the most difficult elements of...

Wednesday, June 28, 2006

Tracking ADC

A third variation on the counter-DAC-based converter theme is, in my estimation, the most elegant. Instead of a regular "up" counter driving the DAC, this circuit uses an up/down counter. The counter is continuously clocked, and the up/down...

Tuesday, June 27, 2006

Buffer circuits

300V PEAK TO PEAK SIGNAL GENERATOR (54) (300vpp) This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall tim...

Bridge circuits

16w bridge amplifier Circuit adds programmability to sensor amplifier: Design Ideas / The pressure-sensor amplifier circuit of Figure 1 offers...

Monday, June 26, 2006

Cell Phone

Cell-Phone-Controlled Audio/Video Mute Switch: Cellular Phone calling Detector: Flashes a LED when detecting an incoming call. Powered by one 1.5V cell Cordless Phone...

Sunday, June 25, 2006

Inverter Circuits

12 Volt Automotive Inverter : This circuit will allow you to operate small devices like laptop computers inside your automobile without an expensive automobile power supply. The circuit takes advantage of the fact that power...

Sunday, June 18, 2006

Microcontroller schematics

Programmer for the 68HC705C8 MicroController Programmer PIC16F84,12C50x and EEPROM 24Cxx PS/2 keyboard keystroke logger based on Atmel 89C2051 ...

Sunday, May 21, 2006

SUN SWITCH 2N3055

2N3055, look fantastic. can do very well as a phototransistor, like this schematics. This Power transistor should be light sensitif and it can do with cutting of up side transistor. the sensitif area which more wide can do like the new phototransisitor...

Friday, May 19, 2006

1 Watt 2.3 GHz RF Amplifier Using a MRF2001

Simplicity and repeatabilty are feature in this 1-wattS-Band amplifier design. The desing uses an MRF2001 transfer as a common base. Class C amplifier The amplifier deliver 1-watt output wi:r 8 dB minimum gain at 24 V. and Is tunable tram 225 to 235...

Infra/radio remote control transmitter/receiver with PIC

This is a general purpose remote control project with using programmable PIC microcontrollers. Schematics are shown for using infrared (RF) or radio (RF) media. If you are not familiar with microcontroller programming, you can use fixed encoder and decoder...

Sunday, April 30, 2006

Car anti theft wireless alarm

This FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park. The receiver unit with CXA1019,...

Friday, April 28, 2006

Ultrasonic Pest Repeller

We also agree, pest is not invited guess. So it is the Pest repeller Schematic.IC CMOS 4047 Operate as low oscillator which the frequency can adjust bettwen 5 khz until 30 khz with trimpot P1.each output Q and Q' feed to inverter Driver 4050 IC2 and...

Wednesday, April 26, 2006

AT90LS8515 PBX / VIRTUAL PBX

in this project, we demonstrate the 4 line telephone PBX systems with full signaling and switching functions similar to those of the central office systems PBX. It's Not Virtual PBX .Dial tone, busy tone, and ring tone are provided during call progress....

Tuesday, April 25, 2006

H-Bridge Motor Driver

H-Bridge Motor DriverA wiring diagram, photograph, and movie of an H-bridge dc motor driver circuit implemented with a TC4424A, TC4427A, or MAX4427 dual MOSFET driver IC. Very useful for running small bot gear motors. Sweet! The Line-Following Robot...

Friday, April 21, 2006

RS-232C multiplexer serves as multiport adapter

Multiport RS-232C PC add-on boards are intended for intensive multichannel communication. Therefore, each serial port has its own transmission controller. If your application doesn't need interrupt-driven service, and polling the devices through RS-232C...

Thursday, March 23, 2006

Water Level Monitors

12 Volt Sump Pump Control: 12 Volt Toilet Tank Refiller: Circuit checks swamp cooler water level: 10/31/2002 EDN - Design Ideas / A "swamp cooler" is an easy way to obtain effective air conditioning, especially in hot and dry climates, if a water source...

Monday, March 20, 2006

Tachometers / RPM Circuits

AN-162: LM2907 Tachometer/Speed Switch Building Block Applications: National Semiconductor - Application Note Digital Tachometer Avoids Analog Vices: 11/10/94 EDN-Design Ideas...

Saturday, March 11, 2006

Programmable Digital Ignition

Two Stroke CDI (Capacitive Discharge Ignition)The next schematic shows the coil configuration at magnetic plate and the position of the pick-up at the outer sider of the plate. This pick-up is triggered by the step on the plate. Below are shown the signals...

Thursday, March 02, 2006

Programmable CDI Ignition with PIC16F84

Features::-As simple as possible-Programmable advance control-Use no exotic hard-to-find components-Use a normal 4.8V RX battery-Integrated spark test function, no signal generator is needed.(makes 4 or 140 sparks/second without the need for a trigger...

Friday, February 24, 2006

New Ultrasonic Sensor for Hobbiests

Look out Devantech, there's a new kid on the proverbial block, the robotics-block, that is. While the ultrasonic sensor line from Devantech has turned into a staple for many hobby robots, it looks like there might be another viable contender. Check out...