Electronics circuit Assembly Shenzhen CN China,Low cost PCBA PCB Assembly,ROHS

Electronics circuits PCBA Assembly,low cost Electronics circuit Shenzhen,CN China
Electronic Circuits Here are some neat circuits you might want to try. The schematics and printed circuit board patterns are GIF's, and may show up different on some browsers. You might want to save the images (especially the PC board patterns) to your hard drive, load them into a photo editor (Photoshop, Paint Shop Pro, The GIMP, etc.) and adjust the size before you transfer the pattern to a board. Printed circuit board patterns are available possible. This page is always under construction and there will be new additions from time to time. Some of these circuits were designed by me, most are not. Whenever possible I have tried to credit the author of a circuit but since many of these circuits are from my personal collection that I have gathered over a period of many years, this information is not always available.

Sound/Radio Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 107,942 128
3 Watt FM Transmitter Rae XL Tkacik 55,648 58 *
50 Watt Amplifier 108,714 62
8 Note Tune Player 25,838 8 *
8 Watt Audio Amp 71,862 51 *
Aircraft Radio Communications Receiver NEW! 25,019 19 *
Crystal Radio 29,277 39 *
Digital Volume Control 67,847 33 *
Electronic Stethoscope 48,840 115 *
FET Audio Mixer 55,239 18
FM Transmitter 239,134 317
Guitar Fuzz Effect 38,410 29 *
Microphone Mixer Anatoly I. Shikhatov 41,586 18 *
Mono To Stereo Synthesizer oRbEq 20,407 12 *
Op Amp Radio 67,431 48 *
Sound Level Meter 68,519 29 *
Stereo Tube Amplifier Weslee Kinsler 47,459 8 *
Tone Control 52,374 10
Transistor Organ 31,750 15

Telephone Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 31,726 21 *
FM Telephone Bug 51,972 39
Phone Busy Indicator 35,401 13 *
Remote Telephone Ringer NEW! 13,263 0 *
Ringing Phone Light Flasher 38,688 20 *
Simple Phone Tap Derek Tombrello 91,660 64 *
Telephone Hold Button 19,036 6
Telephone Recorder

Electronic circuits, kits, do-it-yourself, circuit diagrams, design and electronics hobby schematics

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This site contains lots of FREE electronic circuits (schematics) & do-it-yourself (DIY) circuit diagrams for hobbyists, students, professionals etc. covering a wide range of categories in electronics like audio, music,home/garden related,computer hardware,radio,robotics etc to name a few. There are also links to sites that offer hobby electronic kits and other electronics hobby related stuff. Use the menu on the left to browse different circuit categories. You can view the entire electronic circuit schematics index by clicking here.

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A

AC Power Controls
AC to AC Converters
AC to AC Power Supplies
AC to DC Converters
AC to DC Power Supplies
Acceleration Sensors / Monitors
Acoustic Circuits
Active Antenna
Active Filters
Band-pass
High-pass
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Notch
Acquisitions Data Circuits
Adder Circuits
Air Conditioner (HVAC) Circuits
Air Flow Monitors
Aircraft Receivers
Alarm Circuits
AM (Amplitude Modulation) Circuits
AM Receiver Circuits
AM Transmitter Circuits
Amp Meters
Amplifiers
Audio
Buffer
Differential
High Frequency
High Gain
High Impedance
High Speed
Instrumentation
Intermediate Frequency
Limiting
Logarithmic
Low Noise
Microwave
Operational
Power
RF (Radio Frequency)
Trans impedance
Variable Gain
Video
Audio Mixers
Audio Oscillator Circuits
Amplitude Modulation (AM) Circuits
Analog to Digital (A/D) Circuits
Analog Multipliers
Analog Switches
Anemometer Circuits
Annunciator Circuits
Antenna Circuits
Aquarium Circuits
Astable Circuits
Attenuators
Audio Amplifiers
Audio Circuits
Accessories
Intercom
Level, Tone and Balance Controls
Mixers
Power Amplifiers
Preamplifiers
Stereo
Surround Sound
Audio Mixers
Audio Oscillator Circuits
Automatic Frequency Controls
Automatic Gain Control (AGC) Circuits
Automatic Level Control Circuits
Automotive Circuits

B
Balance Controls
Band-Pass Filters
Dynamic microphone to electret microphone input
Electret microphone powering circuits
Line level signal to microphone input adapter
Simple circuit to connect telephone equipment to audio mixer
Simple line mixer
Simple two line output combiner
Simple microphone preamplifier
Speaker signals to line level inputs
Use amplifier phono input as line level input - inverse RIAA filter
Video circuits
S-video to composite video adapter
TV/Radio antenna cable galvanic isolator
VGA to PAL and NTSC converter - converts RGB to S-video and composite video signals
Computer circuits
Serial port
Analogue to digital converter for PC serial port
Get power out of PC RS-232 port
Use disk drive motors in our projects
VGA card information
VGA timing information
Audio and video systems
Ground loop resources page - lost of information about ground loops problems in audio, video and computer system, includes information how to troubleshoot and solve the problem
PAL and NTSC timing information
SPDIF Digital Audion Interface
Telecommunications
How to record telephone conversations
Telephone line audio interfacing circuits
Telephone line surge protection
Telephone ringing circuits
Power electronics
Light dimmer circuits
Mains transient surge suppression
Semiconductor relays
Light controlling
0 to 10V Analog Control Protocol - information on standard analogue dimmer control protocol
How light dimmers work with example circuits
Other documents
Cable impedance - what it is and how does it effect transmission line operation
European semiconductor marking codes
Plasmaball effect experiment
RC servo motor controlling
Resistor color codes
Safety guidelines for building electronics equipments
FAQs I have written
sfnet.harrastus.audio+video FAQ
sfnet.harrastus.elektroniikka FAQ
VGA to workstation monitor FAQ DiscoverCircuits.., has 26,000+ electronic circuits
or schematics carefully cross-referenced into 500+ categories. As a vital resource for engineers, hobbyists, inventors & consultants, the site's collection of information will help you find quick solutions to electronic design problems.

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DiscoverCircuits Schematics - A through D

A B C D E through M N through R
S through Z Dave's Circuits

My lawyer insisted that I add this DISCLAIMER: DiscoverCircuits.. is a collection of links to 26,000+ electronic circuits or schematics (more are added regularly). I have carefully categorized and cross-referenced each one for ease of selection into over 500 electronic circuit categories. Because I have not tested all these electronic circuits, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner. Thank You.

Note: Only the categories underlined contain circuits. The ones in gray text are categories for future expansion. Please check back often for new circuits in these categories. * = Recently Updated

AC Power Controls Amplifiers Analog Multipliers
AC to AC Converters Audio Analog Switches
AC to AC Power Supplies Buffer Anemometer Circuits
AC to DC Converters Differential Annunciator Circuits
AC to DC Power Supplies High Frequency Antenna Circuits
Acceleration Sensors / Monitors High Gain Applause Meter
Acoustic Circuits High Impedance * Aquarium Circuits
Active Antenna High Speed * Astable Circuits
Active Filters IF (Intermediate Frequency) * Attenuators
Band-pass Instrumentation * Audio Amplifiers
High-pass Limiting Audio Circuits
Low-pass Logarithmic Accessories
Notch Low Noise Intercom
Acquistions Data Circuits Microwave Level, Tone & Balance
Adder Circuits Operational * Mixers
Air Conditioner (HVAC) Circuits Power * Power Amplifiers
Air Flow Monitors RF (Radio Frequency) * Preamplifiers
Air Pollution / Quality Monitor Transimpedance * Stereo
Aircraft Receivers Variable Gain * Surround Sound
Alarm Circuits * Video Audio Mixers
AM (Amplitude Modulation) Circuits Amplitude Modulation (AM) Circuits Audio Oscillator Circuits
AM Receiver Circuits * Analog to Digital (A / D) Circuits Automatic Frequency Controls
AM Transmitter Circuits * Automatic Gain Control (AGC) Circuits
Amp Meters Automatic Level Control Circuits
Automotive Circuits

TOP B Next Previous
Balance Controls Beeper & Buzzer Circuits * Buffer Circuits
Band-Pass Filters - Active Biomedical Circuits Buck / Boost Power Supplies
Band-Pass Filters - Passive Bistable Multivibrators * Buck /Step Down Power Supplies
Battery Backup Circuits Blinking Lights Bug "Electronic" & Detectors *
Battery Chargers * Boost / Step Up Power Supplies Bug / Insect Killers
Battery Monitors * Bridge Circuits * Burglar Circuits
Battery Testers * Broken Pipe Alarm Buzzer Circuits
Barometer (Atmospheric Pressure BTU Meters

Note: Only the categories underlined contain circuits. The ones in gray text are categories for future expansion. Please check back often for new circuits in these categories. * = Recently Updated

TOP C Next Previous
Camera Circuits * Conductivity Sensors Converters - Continued
Camera Flashers Constant Current Circuits * Voltage to Current *
Capacitance Sensors Contact Bounce Suppression Circuits Voltage to Frequency *
Capacitance Switches * Control Circuits * Wide Band
Capacitors (Super) Circuits Converters: Cooling Fan Controls *
Carrier Current Transceivers AC to AC Cosine
Cathode-Ray Circuits AC to DC Counters and Timer Circuits
Cell Phones Analog to Digital (ADC) Crystal Filters
Charge Pump Circuits Current to Voltage Crystal Oscillators *
Chopper Circuits DC to AC Cube Root
Clock Circuits * DC to DC Current Limiters *
Code Practice Circuits Digital to Analog (DAC) * Current Loop Circuits *
Color Organ Circuits Frequency Current Meters
Colpits Oscillators Frequency to Voltage * Current Mirrors
Combustible Gas Detectors Period to Frequency * Current Sensors / Monitors *
Compandor Circuits Period to Voltage Current Source / Sink Circuits *
Comparator Circuits RF (Radio Frequency) * Current to Voltage Converters *
Computer Cables Sine to Square Wave
Computer Interface Voltage

TOP D
Next Previous
DC to AC Converters Demodulators Digital to Analog (D / A) Converters
DC to AC Power Supplies Detectors (see Sensors / Detectors) Dimmer Circuits
DC to DC Converters * Dew Point Meters Direction Finder Circuits
DC to DC Power Supplies Dew Monitors Discriminator Circuits *
Data Acquisition Circuits Differential Amplifier Circuits Display Circuits
Data Communication Bus Difference Amplifier Circuits Distance Monitors
Data Logging Circuits * Differentiator Circuits Divider Circuits
Decibel Meter Digital Adders Doorbell Circuits
Decoder Circuits Digital Circuits Driver Circuits
Delay Circuits Digital Readouts DTMF (Dual Tone Multi Frequency)

Please check out our 2007 Media Kit to see if placing an ad is right for you.
Note: Only the categories underlined contain circuits. The ones in gray text are categories for future expansion. Please check back often for new circuits in these categories. * = Recently Updated

A B C D E through M N through R S through Z Dave's FC's Electronic Circuits

FC's Circuit Archive
New and Updated Projects Changed: April 14, 2008
Solar Power Circuits charge control, LED lights, more
Amateur Radio Circuits beacon keyer, smooth sidetone, antenna tuner
Music Circuits reverb, fuzzbox, panner, isolator, tube amps
Micro Power FM Broadcasting Circuits FM stereo, J-Pole, FM10
Pulse Width Modulator (PWM) Circuits motor speed controls, DC light dimmers
Telephone Circuits phone tap
Geiger Counter Circuits counter mods, numerical counter
Video Circuits camera motor, miniature camera/TV
Miscellaneous Circuitry
13 Color LED Rainbow
The Big-E Stereo Parabolic Microphone
Ultra Low Power LCD Indicator
Stereo Test Tone Generator
Temperature Controlled NICD Charger
Microprocessor RS-232 Reset
TTL Pulse Reading Logic Probe
Lightning Activated Camera Shutter Trigger
Constant Temperature Circuit

Software
Some of my Free Software may be useful for working on electronics projects.
Also, see my list of Linux Cross Assemblers and related projects.

Electronic Stuff For Sale
Several of the solar power circuits featured on this site are available from my kit enterprise, CirKits...
My Electronics Garage Sale is an online virtual ham radio swap-fest table. I currently have a lot of vintage PC cards and other electronics goodies for sale there.

Electronic Circuits Links
4QD Circuits
1176 DIY-page audio compressor
Aaron Cake's Circuits
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JTronics Argentinan electronics site
Lazar's Power Electronics Corner switching power supplies
LED Museum
Lessons in Electric Circuits, an online book.
Machine Design Switches Reference Center.
MKARS 80 qrp/ssb ham project
Music From Outer Space (Analog Synths)
Next Electronic Circuits Database
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Analog, Digital, Symbolic, RF, VHDL, MCU and Mixed-Mode Circuit Simulation & PCB Design

TINA Design Suite is a powerful yet affordable software package for analyzing, designing and real time testing analog, digital, VHDL, MCU, and mixed electronic circuits and their PCB layouts. You can also analyze RF, communication, optoelectronic circuits, test & debug microcontroller applications. A unique feature of TINA that you can bring your circuit to life with the optional USB controlled TINALab II hardware which turns your computer into a powerful, multifunction T&M instrument. Electrical engineers will find TINA an easy to use, high performance tool, while educators will welcome its unique features for the training environment.

Easy to use schematic entry. Enter any circuit within minutes with TINA's easy-to-use schematic editor. Enhance your schematics by adding text and graphics elements such lines, arcs arrows, frames around the schematics and title blocks. Choose components from the large library containing more than 20,000 manufacturer models. You can check schematics for errors with TINA??s advanced ERC functions. The schematic editor supports complex hierarchical designs, team design and version control.

Powerful analysis tools. Analyze your circuit through more than 20 different analysis modes or with 10 high tech virtual instruments. Present your results in TINA's sophisticated diagram windows, on virtual instruments, or in the live interactive mode where you can even edit your circuit during operation, develop, run, debug and test VHDL & MCU applications.

Integrated PCB design. The new fully integrated layout module of TINA has all the features you need for advanced PCB design, including multilayer PCB??s with split power plane layers, powerful autoplacement & autorouting, rip-up and reroute, manual and ??follow-me?? trace placement, DRC, forward and back annotation, pin and gate swapping, keep-in and keep-out areas, copper pour, thermal relief, fanout, 3D view of your PCB design from any angle, Gerber file output and much more.

Advanced presentation tools. Make stand-out reports and presentations of schematic diagrams, annotations, formulas provided by symbolic analysis, Bode plots, Nyquist diagrams, poles and zeros, transient responses, digital waveforms, and other data using linear or logarithmic scales. Customize presentations using TINA's advanced drawing tools to control text, fonts, axes, line width, color and layout. You can create, edit and print documents directly inside TINA or cut & paste your results into your favorite word processing or DTP package.

Importing Spice models. Create new TINA components from any Spice subcircuit, whether created by yourself, downloaded from the Internet, obtained from a manufacturer's CD or from portions of schematics turned into subcircuits. TINA automatically represents these subcircuits as a rectangular block, but you can create any shape you like with TINA's Schematic Symbol Editor. You can also use TINA's parameter extractor program to calculate model parameters from catalog or measurement data and then add the new devices into the catalog.

Educational tools. TINA also includes unique tools for testing students' knowledge, monitoring progress and introducing troubleshooting techniques. With optional hardware it can be used to test real circuits for comparison with the results obtained from simulation.

Virtual Instruments: Oscilloscope, Function Generator, Multimeter, Signal Analyzer/Bode Plotter, Network Analyzer, Spectrum Analyzer, Logic Analyzer, Digital Signal Generator, XY Recorder.

Real time measurements. TINA is far more than a simulation software with virtual measurements. You can install optional, supplementary hardware that allows real-time measurements controlled by TINA's on screen virtual instruments.