MONTAJES DE ELECTRONICA EN GENERAL

Alarms and security related

·  Ultrasonic remote control & alarm system

·  Door knob alarm (PDF)

·  Water seepage alarm (PDF)

·  Micro-power over temperature alarm (PDF)

·  5 Zone alarm circuit

·  Miniature loop alarm

·  Gate alarm circuit

·  Perimeter monitor

·  Digital combination lock

·  Touch activated alarm system  

Audio filters

·  3KHz low-pass filter plus audio amp (PDF)

·  "A" Weighting Filter For Audio Measurements

·  Multiple Feedback Bandpass Filter

·  Akerberg-Mossberg (AM) Second Order Bandpass inverting

·  Deliyannis Second Order Bandpass I inverting

·  Deliyannis Second Order Bandpass II inverting

·  KHN (Non-Inverting Input) Second Order Bandpass inverting

·  Multiple Feedback (MFB) Second Order Bandpass I inverting

·  Multiple Feedback (MFB) Second Order Bandpass II inverting

·  Tow-Thomas (TT) Second Order Bandpass inverting

·  Twin-T Second Order Bandpass inverting

·  Berka-Herpy (BH) Second Order Bandpass non-inverting

·  Fliege Second Order Bandpass non-inverting

·  KHN (Inverting Input) Second Order Bandpass non-inverting

·  Mikhael-Bhattacharyya (MB) Second Order Bandpass non-inverting

·  Sallen-Key (SK) Second Order Bandpass non-inverting

·  Akerberg-Mossberg (AM) Second Order Notch inverting

·  KHN (Non-Inverting Input) Second Order Notch inverting

·  Berka-Herpy (BH) Second Order Notch non-inverting

·  Fliege Second Order Notch non-inverting

·  KHN (Non-Inverting Input) Second Order Notch inverting

·  Mikhael-Bhattacharyya (MB) Second Order Notch non-inverting

·  Sallen-Key (SK) Second Order Notch non-inverting

·  Twin-T Second Order Notch I non-inverting

·  Twin-T Second Order Notch II non-inverting

·  First Order Highpass III inverting

·  First Order Highpass IV inverting

·  First Order Highpass I non-inverting

·  First Order Highpass II non-inverting

·  Akerberg-Mossberg (AM) Second Order Highpass inverting

·  KHN (Inverting Input) Second Order Highpass inverting

·  Multiple Feedback (MFB) Second Order Highpass inverting

·  Berka-Herpy (BH) Second Order Highpass non-inverting

·  Fliege Second Order Highpass non-inverting

·  KHN (Non-Inverting Input) Second Order Highpass non-inverting

·  Mikhael-Bhattacharyya (MB) Second Order Highpass non-inverting

·  Sallen-Key (SK) Second Order Highpass I non-inverting

·  Sallen-Key (SK) Second Order Highpass II non-inverting

·  Twin-T Second Order Highpass non-inverting

·  First Order Lowpass III inverting

·  First Order Lowpass I non-inverting

·  First Order Lowpass II non-inverting

·  Akerberg-Mossberg (AM) Second Order Lowpass inverting

·  KHN (Inverting Input) Second Order Lowpass inverting

·  Multiple Feedback (MFB) Second Order Lowpass I inverting

·  Multiple Feedback (MFB) Second Order Lowpass II inverting

·  Bach Second Order Lowpass non-inverting

·  Berka-Herpy (BH) Second Order Lowpass non-inverting

·  Fliege Second Order Lowpass non-inverting

·  KHN (Non-Inverting Input) Second Order Lowpass non-inverting

·  Mikhael-Bhattacharyya (MB) Second Order Lowpass non-inverting

·  Sallen-Key (SK) Second order Lowpass I non-inverting

·  Tow-Thomas (TT) Second Order Lowpass non-inverting

·  Twin-T Second Order Lowpass non-inverting  

Audio power amplifiers

·  8 watt audio amp

·  20W Amplifier

·  50W Amplifier

·  100W RMS Amplifier

·  2-Channel Power Amplifier

·  Push-Pull Class A Amp using type 5687 dual triodes

·  Push-Pull Class A 2A3 Stereo Amp

·  Single Ended Class A2 SV811-10 Stereo Amp

·  Audio amplifier output relay delay

·  HeadBanger Headphone Amp

·  2W Amplifier

·  TDA2030 8 Watt amplifier

·  16 Watt amplifier

·  8 Watt amplifier

·  20 Watt Class-A Power Amplifier

·  El-Cheapo - A Really Simple Power Amplifier

·  Single Chip 50 Watt / 8 Ohm Power Amplifier

·  Hi-Fi Headphone Amplifier

·  100W Guitar Amplifier

·  Death of Zen (DoZ) - A New Class-A Power Amp

·  Soft-Start Circuit For Power Amps

·  Thermo-Fan To Keep Your Amp Cool

·  Audio Amp Output Power Limiter

·  55W (Originally 75W) Power Amplifier

·  300W Subwoofer Power Amplifier

·  20 Watt / Channel Stereo Power Amplifier  

Audio preamp circuits

·  Simple microphone preamplifier

·  Phono Preamp

·  Simple microphone preamplifier

·  ECM Mic preamp

·  Hi Fi preamp

·  Electret mic amplifier

·  Audio preamplifier

·  Audio preamp  

Automative, car and motorcycle

·  Portable CD Player Adapter For Car

·  Car battery charger

·  Wireless Auto Tachometer

·  Headlight reminder  

Data acquisition and data logging

·  Analog input section based on AD9220

·  Honey Bee counter (PDF)

·  Capacitance type liquid level measurement (PDF)

·  Serial Port A/D-converter

·  Centronics port D/A converters and low-pass filter

·  Water-level sensor  

Games and fun stuff

·  Pine Racecar Victory Judge

·  GameBoy Schematic

·  GameBoy LCD schematic

·  GameBoy Power & Cartridge schematic

·  GameBoy ROM+RAM+MBC1 Cart Schematic

·  GameBoy MBC1 circuit equivalent

·  Super GameBoy schematic

·  Quiz show indicator

·  DIT shutterglasses controller  

Infrared based schematics

·  IR remote control

·  40KHz light receiver (PDF)

·  40KHz TV-VCR repeater (PDF)

·  Infrared remote transponder

·  Build an Infrared night scope

·  Decoding IR Remote Controls

·  IR detector

·  PC IR Remote Control

·  Pyroelectric Infrared Sensor

·  Simple IR transmitter circuit

·  Simple infra-red detector

·  IR remote control extender

·  IR remote control tester

·  40khz IR Tester

·  555 timer 40khz IR Oscillator

·  IR detector / emitter

·  Cheap 40KHz clock

·  Stable 40KHz clock

·  Serial driven IR remote control

·  IR remote transponder  

Laser related power supplies and data transmission

·  Laser power supply

·  Laser transmitter/receiver

·  20MHz VCSEL 3mW laser test circuit (PDF)

·  10MHz to 20MHz laser light detector (PDF)

·  Micro-power 40KHz burst laser diode driver (PDF)

·  40KHz laser burst detector (PDF)

·  Modulated laser diode tester (PDF)

·  Experimental laser data link

LED related schematics 

·  LED chaser

·  7 Segment LED Counter

·  1.5V LED flasher B (PDF)

·  Low current LED flasher (PDF)

·  1.5V LED flasher A (PDF)

·  Flashing LED advertising badge (PDF)

·  Pulsed LED test circuit (PDF)

·  Low battery voltage flasher (PDF)

·  Adjustable flashing LED

·  LED Mood Light

·  LED Audio VU Meter

·  LM3909 LED flasher

Lighting

·  TRIAC light dimmer

·  12VDC Fluorescent Lamp Driver

·  Strobe light

·  Adjustable Strobe Light

·  5W Fluorescent light intensity modulator (PDF)

·  1W Fluorescent lamp night light (PDF)

·  Electronic night light

·  LED Mood Light

·  LX-800 Lighting system

·  Xenon Strobe Light

·  Lamp flasher/dimmer

Medical and health related

·  Simple lie detector

·  The ESP SIM (Sound Impairment Monitor)

Microcontroller based

·  AT89C2051/4051scanning 7-segment display and keypad

·  AT89C2051/4051 Driving dot LED

·  AT89C2051/4051stepper motor interface

·  AT89C2051/4051connecting dumb terminal

·  Simple RS232C Level Converter using Transistors

·  C-52 EVB Robot Controller

·  Mains clock controller using AT89C2051

·  AT89C2051/4051 Easy-Downloader

·  AT89C51/52/55 Easy-Downloader

·  PIC16F84 programmer

·  PIC16F84 miniature real-time controller

·  Isolated RS232 for PIC16F84

·  PIC16F84 debugging terminal

·  MiniLOGGER V1.0

·  Atmel 89C Series Flash Microcontroller Programmer

·  AT89C2051 real-time controller

·  PIC12C508 Night-light saver

·  AT89C2051 Night light saver

·  Atmel 8051 Flash Based-Microcontroller Programmer

·  AT89C2051 Digital thermometer and clock

·  Build a PIC controlled DDS VFO, 0 to 6 MHz

·  PIC controlled DDS VFO, 0 to 6 MHz

·  PIC16F84 line following robot

·  50 MHz frequency counter, voltage meter & SWR/PWR indicator

·  PIXpand

·  Serial to parallel converter using the AT89C2051

·  AT89C2051 serial COMs to LED driver

·  101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU

·  A Scenix (and PIC) Programmer

·  Long-period watchdog timer

·  PIC Project #1 - RS232 to I2C Interface

·  Dual PIC16C84 prototype board

·  Talking YODA project (PIC16C84)

·  2-wire LCD interface using PIC16CF84

·  PIC16F84 Serial I/O-expander with PicBasic

·  Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard

Misc audio (also see Music, Amplifiers, Preamp)

·  Old-fashioned siren effect

·  Simple VOX circuit

·  Analog VU meter

·  Voltage controlled amplifier

·  Audio graphic equaliser

·  Intercom preamp

·  FET audio mixer

·  Microphone mixer

·  Tone control

·  Digital volume control

·  Sound level meter

·  Very loud beeper (PDF)

·  Digital noise generator (PDF)

·  Condenser microphone hookup

·  Phase shifter

·  Paradoxical Sound Syntheizer

·  Audio line isolator

·  Dynamic microphone to electret microphone input

·  Use amplifier phono input as line level input

·  Speaker signals to line level inputs

·  Sine wave generator

·  3-Band equalizer

·  6-Input mixer

·  Doorphone intercom

·  Stereo line driver

·  Audio notch filer

·  Peak reading audio level meter

·  Tone control

·  Electronic canary

·  Improved PL tone decoder

·  Magnetic cartridge amplifier

·  LM358 preamp

·  Sound detector

·  Tone detector

·  Tone generator

·  Warbler

·  Voltage Controlled Panner

·  Low Noise Microphone Preamplifier

·  Bridging Adapter For Power Amplifiers

·  Simple Surround Sound Decoder

·  Simplest Ever Amplifier Bridging

·  Stereo Width Controllers

·  Power Amplifier Clipping Indicator

·  Phono Preamps For All

·  Digital Delay Unit For Surround Sound

·  Parametric And Sub-Woofer Equaliser

·  High Quality Sound Mixer

·  Loudspeaker Protection and Muting

·  Direct Injection Box for Recording & PA Systems

·  Minimalist Discrete Hi-Fi Preamp

·  Signal Detecting Auto Power-On Unit

·  Load Sensing Automatic Switch

·  Amplifier thermal protection

·  Active Sub-Woofer and Controller

·  Balanced Line Driver & Receiver

·  VU And PPM Audio Metering

·  Variable Amplifier Impedance

·  Linkwitz Cosine Burst Generator

·  Low Noise Balanced Microphone Preamp

·  Fast Audio Peak Limiter

·  Subwoofer Equaliser

Miscellaneous schematics

·  Simple BFO metal detector

·  Random noise generator

·  Analog pulse counter

·  Analog opto-isolator

·  Pulse width modulators (PWM)

·  Pulse width to voltage converter

·  Fantastic Atom Expander

·  Black Light

·  Flash slave trigger

·  Ion detector

·  Ultrasonic transducer oscillator circuit

·  Fogger smoke machine

·  Electric field disturbance monitor

·  Dual comparator forms temperature-compensated proximity detector

·  Electromagnetic field detector

·  Ultrasonic dog whistle

·  An Inexpensive X-ray Machine

·  Ultrasonic switch

·  Very basic circuits

·  Bat detector

·  FCTS Project

·  Morse Code Beacon Keyer

·  Lightning Activated Camera Shutter Trigger

·  Morse Code Practice Keyer 1

·  Morse Code Practice Keyer 2

·  741 Light Sensor

·  Fluid level detector t  

• Simple Variable Voltage Source
• LM317 Variable Voltage Regulator
• LM317 Regulator With Pass Transistor
• Variable 3 - 24 Volt / 3 Amp Power Supply
• Variable Voltage and Current Power Supply
• 2 Cell Lithium Ion Battery Charger
• 2 watt switching power supply
• Low Power DC to DC Converter
• Constant Current Battery Charger
• 120VAC Lamp Chaser Using Solid State Relays
• 120 VAC Lamp Dimmer (full wave SCR)
• Varying Brightness AC Lamp
• 12 Volt Lamp Fader (Automatic)
• 1.5 Hour Lamp Fader (Sunset Lamp)
• 12 Volt Lamp Dimmer (using a pot)
• Interfacing 5 volt CMOS to 12 volt loads
• Low Voltage , High Current Time Delay Circuit
• High Current Regulated Power Supply
• Thermostat for 1KW Space Heater (SCR controlled)

Bowden's Hobby Circuits

·  0-10V control for RC servos

·  Simple flashing light circuit

·  Simple flashing light circuit

·  A dual alternating flashing light circuit

·  Simple flashing light circuit

·  A dual tandem flashing light circuit powered by a 9 volt battery

·  Simulate the Gyralite (dual flashing headlights).

·  Simple train detector using ambient light and a photocell

·  Two tone train horn

·  Radio Control Battery Backup

·  Current loop interface

·  Switching solenoid driver

·  Modular relay system

·  Light/dark detector

·  Pulse Width Modulation DC Motor Control

·  Stepper motor controller

·  Temperature monitor

·  Cold activated switch

·  Voltage comparator switch

·  Dark activated switch

·  DC Push Button Motor Control Circuit

·  Light detector

·  Sound operated switch

·  http://www.rentron.com/SerialServo.htm

·  Constant Temperature Circuit

·  PWM DC Motor Speed Control

·  Solenoid starter

·  CO2 controller for planted tanks

·  Light activated relay

·  Octave screamer

·  Optical Theremin - electronic musical instrument

·  Simple colour organ

·  Guitar fuzz effect

·  8 note tune player

·  Colour (Sound) Organ

·  Transisor organ

·  Simple line mixer

·  Simple MIDI tester

·  Electronic metronome

·  Guitar Reverb Pedal

·  Guitar Tremolo Unit

·  Spring Reverb Unit For Guitar

·  Ultra Simple Bass Guitar Compressor

·  Vox AC30 Guitar Amplifier Simulator

·  Guitar Vibrato Unit

·  Musical Instrument (Expandable) Graphic Equaliser

·  Linux Infra-red Remote Control (LIRC)

·  Compter microphone

·  Laptop Computer Serial Port Power Booster

·  Power supply provides +5VDC regulated, +10VDC unregulated and 7.5VAC

·  A Bench PSU (0-15v 0-3A)

·  6V to 12V Converter

·  Tesla coil / HV generator

·  12VDC To 120VAC Inverter

·  High Current Power Supply

·  Dual Polarity Power Supply

·  High Voltage High Current Power Supply

·  Transformerless Power Supply

·  Fixed Voltage Power Supply

·  Voltage Inverter

·  Voltage Inverter

·  Negative voltage generator

·  Power reminder beeper (PDF)

·  Unplugged power cord alarm

·  Machine power loss beepter (PDF)

·  HV supply: 12VDC in, 12KV out

·  Generating -5VDC from +5VDC

·  Filtering PC bus POWER

·  Adjustable power supply using LM317

·  Simple +5V power supply circuit

·  12V 30A power supply

·  Dual regulated power supply

·  Fuse blown indicator

·  Gyrator circuit

·  Variable power supply

·  Nicad battery charger

·  Regulated 12V supply

·  Unregulated power supply

·  12 volt battery monitor

·  12 volt power supply

·  5 volt power supply

·  Battery voltage monitor

·  LM3914 battery monitor

·  Multiple voltage power supply

·  Voltage doubler

·  Voltage inverter

·  Low Power LED Voltmeter

·  Temperature Controlled NICD Charger

·  Simple Capacitance Multiplier Power Supply For Class-A Amplifiers

·  Simple DC Adapter Power Supply

·  Variable Dual Lab Power Supply

·  Charger for gel lead acid batteries

SOLAR

·  AA battery solar charger

·  Solar Panel Charge Controller / Low Voltage Disconnect Circuit

·  Solar Panel Current Meter

·  Solar Charged LED Flashlight

·  AA battery solar charger

·  Solar Panel Charge Controller / Low Voltage Disconnect Circuit

·  Solar Panel Current Meter

·  Solar cell Nicad charger

Telephone

·  Ringing Phone Light Flasher

·  Phone Busy Indicator

·  FM Telephone Bug

·  Cut Phone Line Detector

·  Simple Phone Tap

·  Telephone Hold Button

·  Telephone Recorder

·  Caller ID decoder

·  Telephone in use light

·  Detecting a telephone RING

·  Phone In-Use Light

·  Phone to audio interface

·  Phone Off-Hook Indicator

·  'phone rang' indicator light

·  Phone Line to Audio

·  Phone in-use

·  Telephone Line Monitor

·  Use old phones as an intercom

·  Phone-In-Use indicator

·  Hold function for Telephone

·  Digital/Standard Phone Line Tester

·  Telephone privacy adapter

·  Telephone ringing circuits

·  Simple circuit to connect telephone equipment to audio mixer

·  Hands-free telephone

·  Using old phones as an intercom

·  Phone line to audio

·  Phone recorder

·  Telephone tap

·  Telephone controlled night light

Test

·  Tri-Waveform Generator

·  JFET crystal testing oscillator

·  Electric field & leakage detector

·  Simple polarity detector

·  RCM710 Electronic Scale

·  LASER/LED light output intensity meter (PDF)

·  Frequency and capacitance meter

·  Simple light sensor adapter for oscilloscope

·  Time Domain Reflectometer (TDR)

·  EMF field probe

·  Function generator

·  Logic probe

·  Zener diode tester

·  Pulse Reading Logic Probe

·  Pink Noise Generator for Audio Testing

·  Audio Millivoltmeter

·  Audio Test Oscillator

·  Full Featured Transistor Tester

·  Opamp Design and Test Board

·  Microphone Circuit Test Oscillator

·  Distortion Analyser

·  Self Oscillating Amplifier for Distortion Testing

·  Build a Magnetic Field Immunity Tester

·  555 Timer IC Tester

·  Continuity tester 2

·  Continuity tester

·  Logic probe

·  Time Delay Relay

·  Time Delay Relay

·  Line powered 60Hz clock generator (PDF)

·  Clock divider

·  Clock doubler

·  CMOS oscillator

·  Crystal 32.768KHz CMOS Oscillator

·  Crystal oscillator

·  Cheap 40KHz clock

·  Stable 40KHz clock

·  'Rounding Off' a square wave

·  Switch debounce using 555

·  Square wave to sine wave converter

·  Push Button Switch Debouncer

·  Square wave oscillator

·  Clock generator

Transmitter

·  Spark-gap transmitter

·  Wireless microphone

·  A 3m (100 MHz) small bug

·  FM transmitter

·  Small Radio Transmitter

·  FM Telephone Transmitter

·  Miniature FM transmitter

·  Sensitive FM transmitter

·  Simple RF transmitter

·  1.5 volt tracking transmitter

·  Tracking transmitter

·  Micro Power FM Broadcasting Circuits

·  Low Power FM Transmitter

·  30-Meter QRP Transmitter for Morse Code

·  Miniature FM Transmitter #1

·  Miniature FM Transmitter #2

·  Miniature FM Transmitter #3

·  Light sensing RF transmitter

·  Micro-Spy with FETs

·  Micro-Spy with USW

·  Micro-Spy with TTL

Video

·  Audio / video distribution amplifier

·  Driver for multiple VGA monitors

·  Closed-Caption Decoder

·  PIC-Tock video clock

·  Video signal edge enhancement

·  Video amplifier

·  TV/Radio antenna cable galvanic isolator

·  S-video to composite video adapter

·  VGA converter for video projectors and fixed frequency monitors

·  VGA to TV converter

·  VGA to PAL and NTSC converter

  Descripción de Kicad