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Home [/] Search electronic circuits Most popular schematics Sitemap Home Circuits & schematics Electronics guide Search Most popular Sitemap Sitemap Audio 1.5W Audio power amplifier (12V) 10 Band Audio Equalizer 100W Audio Amplifier 100W Guitar Amplifier 100W RMS Amplifier 10W Audio Amplifier with Bass-boost 10W Audio Power Amplifier 10W Mini Audio Amplifier 16w Bridge Amplifier 18W Audio Amplifier 1W Bass Power Amplifier 200W audio amplifier 20W Power Amplifier 22 Watt Audio Amplifier 22W Stereo Amplifier 250 mW Audio Amplifier 25W Mosfet audio amplifier 3 Channel Spectrum Analyzer 3 Line Mixer 3 Transistor Audio Amp (50 milliwatt) 5 band graphic equalizer using a single IC/chip 5 Watt Class-A Audio Amplifier 50 Watt Amplifier 60W Bass Amplifier 60W Guitar Amplifier Add on Stereo Channel Selector Amplified Ear Amplifier 2x30W with STK465 Amplifier of acoustic frequencies with preamplifier Audio Distribution Amplifier Audio Pre-Amplifier Audio Visual Indicator for Telephones Automatic Loudness Control Balanced Low Noise Microphone Preamp Band 2 Preamplifier Bass-treble tone control circuit Bass-treble tone control circuit Baxendall Tone Control Classic Audio Mixer Digital Volume Control Digital Volume Control Digital Volume Control Electret Microphone Pre-Amplifier Electronics Attenuator FET Audio Mixer Guitar Amplifier Headphone Amplifier Headphone Monitoring Switch Improved 3 Transistor Audio Amp (80 milliwatt) Infrared Head Phones Loudspeaker Test Box Low cost intercom using transistors Low impedance microphone amplifier Mini-box 2W Amplifier Minimalist Discrete Hi-Fi Preamp Musical Instrument (Expandable) Graphic Equaliser Phono Preamplifier Portable Headphone Amplifier Portable Microphone Preamplifier Portable Mixer Precision Audio Millivoltmeter Simple Intercom Sound Controlled Filp Flop Sound detector latch Sound Level Meter Sound Pressure Level Meter Speaker Microphone Speech Recorder Stereo Channel Selector Stereo Preamplifier with Bass-boost Stereo Tone Control Stereo Tube Amplifier Surround Sound Decoder Three-Level Audio Power Indicator Two transistor audio amplifier circuit Two way cross-over 3500 Hz Ultrasonic pest repellent Ultrasonic Switch Automotive Automatic Headlight Brightness Switch Capacitor Discharge Ignition Circuit (CDI) Car Alarm Arming Horn Beep Canceller Car Battery Charger Charge Monitor for 12V lead acid battery Dome light dimmer for Cars Headlight Flasher Headlights Timer Intermittent wiper controller Lighting Third Brake Light Nite Rider Lights Park-Aid Pulsing Third Brake Light Simple but reliable car battery tester Speed-limit Alert Synchronized multi-spark module (SMSM) for Electronic Ignition Devices (EID) Ultrasonic Parking Sonar Wiper Speed Control Games and entertainment 3V LED Chaser 6V Ultra-Bright LED Chaser Electronic Scoring Game Game Show Indicator Lights (Who's First) JAM(Just A Minute) Circuit Pinewood Derby Finish Line Lamps The flashing Heart The Millipede TV remote control Blocker Microcontrollers "SimpleMouse" Smartcardprogrammer ATMEL 89 Series Flash Microcontroller EPROM adapter for ATMEL 89 Series Flash Microcontroller Programmer Ver 2.0 Funcard Programmer by Diesel Gold wafer cards Phoenix Programmer PIC diode tester Ponyprog Circuit for ATMEL'S AVR Producing your own Decrypt Viewing Card Mk2 Programmers for Jupiter Card Servo Motor Control with PIC16F84 Telephone operated remote control using PIC16F84A microcontroller Miscellaneous 7 Segment LED Counter Cellular Phone calling Detector Cuckoo sound Generator Digital Step-Km Counter Economical Pump Controller Economy radar detector Flyback Transformer Driver Intercommunication (Intercom) Keys Finder Nocturnal Animals Whisker One-IC two-tones Siren Pot plant water tester Programmable Digital Code Lock S-video to RCA Simple Lie Detector SmartCard PC Emulator Time Delay Relay Time Delay Relay II Ultrasonic Pest Repeller Whistle Responder Models and model remote control Clap Activated Remote Deluxe Charge Rate Limiter for Small Capacity NiCad Batteries Discharger for Receiver Battery Packs Downed Model Locator Downed Model Locator II Infra Red Switch Infrared Remote Control Multi Rocket Launcher Precision Receiver Battery Low Voltage Alarm Radio Remote Control using DTMF Receiver Battery Low Voltage Alarm Remote control using telephone Remote control using VHF modules Motor, light and power control 1.5 Hour Lamp Fader (Sunset Lamp) 12 Stage Neon Sequencer (NE-2 / NE-51) 12 Volt Lamp Dimmer 120VAC Lamp Chaser 12VDC Fluorescent Lamp Driver 16 Stage Bi-Directional LED Sequencer 18 Stage LED Sequencer 220 Volts Flashing Lamps 25 Light Sequencer using Xmas lamps 6 Channel Auto Reverse Sequential 60 Light Sequencer using a Matrix 73 MHz Hallogene Lamp Radio-Controlled Adjustable Strobe Light Alternating Flasher Audio Light Modulator Auto Heat Limiter for Soldering Iron Automatic 12 Volt Lamp Fader Automatic Dual output Display Automatic Room Lights Automatic Speed Controller for fans & Coolers Battery-powered Night Lamp Bicycle back Safety Light Black Light Brightness Control for small Lamps Brightness of multiple displays control circuit Christmas Star Courtesy Light Dancing LEDs Dark-activated LED or Lamp Flasher DC Motor Control Circuit DC Motor Reversing Circuit Digital Stopwatch 0-60sec Discrete component motor direction controller Discrete component motor direction controller Dome Lamp Dimmer Emergency Light Expandable 16 Stage LED Sequencer Fading LEDs Fancontrol Flashing Neons (NE-2 / NE-51) Flashy Christmas Lights High And Low Voltage Cut Off With Time Delay Infa-Red Remote Control Interfacing 5 volt CMOS to 12 volt/ 25 Watt Loads IR Remote Control Jammer Knightrider lights for model cars LASER Transmitter/Receiver LED Chaser LED or Lamp Flasher LED or Lamp Pulser LED Photo Sensor LEDs or Lamps Sequencer Light Activated Relay Light Flasher Optical toggle switch using a single Chip Pulse Width Modulation DC Motor Control PWM Motor/Light Controller Running Message Display Simple DC motor PWN speed control Solid State Power Controller Stepper Motor Controller Sunrise Lamp Super simple stepper motor controller Temperature-controlled Fan Touch Activated Light TRIAC Light Dimmer Triple Stroboscope Two-wire Lamp Flasher Unipolar Stepper Motor Controller Oscillators and timers 1KHz Sinewave Generator 28 LED Clock Timer 28 LED Clock Timer 50 Hertz LED Clock Timebase 72 LED Clock 9 Second Digital Readout Countdown Timer 9 Second LED Timer and Relay Circuit Amplifier Timer Bedside Lamp Timer Headlights Timer Jogging Timer Low Frequency Sinewave Generators Low Voltage, High Current Time Delay Circuit Low-distortion Audio-range Oscillator Mini Metronome Photo Timer Circuit Precision Metronome and Pitch generator Pulse-Generator & Signal-Tracer Reverse Bias Oscillator Sawtooth wave generator Self-powered Sine to Square wave Converter Simple IF Signal Generator Simple variable frequency oscillator Tan Timer Timed Beeper Triangle and Squarewave Generator PC related 3-Axis Stepper Controller 4 - Channel Digital Logic Analyzer and 5 Channel Digital Oscilloscope by using PC Parallel Port 7 segment rolling display using PC 8 Channel software controlled fanbus with PWM A Laboratory Control System for Cold Atom Experiments A Worked Stepping Motor Example An Improved Infrared Receiver with Status LED Build your own printer cable LCD Display Casio data logger Control electrical appliances using PC DS1620 based USB Digital Thermometer DS1621 pc thermometer Improved Infrared Receiver with status led IrDA interface for your mainboard LCD Module Control with PC LCD2LPT with LIRC Monitor Your PC's CPU Core Temperature Opto-Isolated Stepper Motor Controller Parallel Port Relay Interface PC based Frequency Meter PC Serial Receiver (57.6K Baud / TTL & CMOS) PC Thermometer V2 Reading Data From The Parallel Port RJ45 Network card to IR communication RS-232 Laser Transceiver Simple Analog to Digital Converter Simple PC thermometer Stepper motor controller The 8Way Relay Board The Relay Sub Board The Simplified I/O Interface Use the CD-ROM drive as a audio CD player without the computer VGA to TV Scart Power 0-30 vdc stabilized power supply with current control 0.002-3 a 0-50V 2A Bench power supply 10 Amp 13.8 Volt Power Supply 12 Volt 30 Amp PSU 120 VAC Lamp Dimmer 12V Inverter 13.8V 20A power supply 2 Watt Switching Power Supply 2W Switching Power Supply 3-30 V/2.5 A Stabilized power supply 500W low cost 12V to 220V inverter 5V/1A Power Supply 6V to 12V Converter A simple step-up converter (6V to 12V) AC Current Monitor Basic UPS Power Supply Batteries charger & PSU - ideal for digital cameras Constant Current Battery Charger DC to DC Converter Dual Polarity Power Supply Dual Regulated Power Supply Fixed Voltage Power Supply Fuse Monitor / Alarm High and Low Voltage Cutout with delay and Music High Current Power Supply High Voltage, Low Current Supply Instrument panel lamp dimmer control Inverter LASER Power Supply LM317 VARIABLE POWER SUPPLY Negative Supply from single positive Supply Ni -Cd Batteries Charger Ni-Cd Battery Auto Charger Nicad Battery Charger NiCd - NiMH Charger Over / Under Voltage Cut-Out Portable CD Player Adapter For Car Power-Off Time Delay Relay Power-On Time Delay Relay Pulse Charger for reviving tired Lead Acid batteries Regulated 12 Volt Supply Self switching Power Supply Self-powered Fast Battery-Tester Simple Car Battery Charger Solar charger for lead-acid batteries Solid State Tesla Coil/High Voltage Generator Transformerless Power Supply TTL Power Supply with СCrowbarТ protection Ultra low drop linear voltage regulator Variable 3 - 24 Volt / 3 Amp Power Supply Variable DC Power Supply Variable Voltage and Current Power Supply Varying brightness AC lamp Voltage Inverter Voltage Inverter II Whistle On - Whistle Off RF circuit 1 Watt C-Class RF Amplifier 15W Fm-transmitter 2 Transistor FM Voice Transmitter 20dB VHF Amplifier 3W FM Transmitter 4 Band Double Tuned Preselector 4 Transistor Transmitter 4 Watt FM Transmitter 40 meter Direct Conversion Receiver 4W FM Transmitter 6 x 6 Loop Antenna 60W Linear amplifier A small FM transmitter (SMD) Active Antenna for Medium Wave AM FM Simultaneous Transmitter Using Digital IC AM Receiver AM To FM converter AM Transmitter Band 2 Preamplifier Bipolar Regenerative receiver CB receiver CB transmitter Coil-less FM Transmitter Coilless FM transmitter Economy short-wave receiver Electronic Eavesdropping Devices Detector Field Strength Meter FM Beacon Broadcast Transmitter (88-108 MHz) FM radio FM transmitter FM Transmitter Bug FM Transmitter with Opamp FM voice transmitter for Band 2 VHF Linear FM 30Watt Linear FM 50Watt with BLY90 Long range FM transmitter Low Distortion Crystal Oscillator Low-Frequency Crystal Controlled Oscillator Medium range transmitter Micro Power AM Broadcast Transmitter MK414 SW Receiver MK484 Portable Receiver MPF102 FM Receiver One Transistor FM Radio Powerful AM transmitter Sensitive Field Strength Meter Simple FM Transmitter Simple Op-Amp Radio Small Radio Transmitter Surveillance Transmitter Detector SW RF Pre-Amplifier Transmitter FM 45W with valve TV Signal Amplifier VHF Audio Video Transmitter VHF Video Transmitter Video Signal Amplifier Video to RF Modulator ZN414 Portable AM Receiver Robotics 12-way Input/Output Interface 5-motor walker circuit 90S2313 AVR Robot Board IR Detector for Robotics Line Robot RF Modem Robotics Project Walker Robot Security and other sensors and detectors 4 channel Telemetry System 4 in 1 Burglar Alarm A simple electronic buzzer Beeper Big Ben Sound Brakelight Flasher Capacitive Sensor Car anti theft wireless alarm Color Sensor Combination Lock DayLight Alarm Dew sensor Digital Remote Thermometer Door Alarm Electronic detector of air flow Electronic Lock Electronics Telephone Talking Circuit Emergency Light & Alarm Factory Siren Field-strength meter Fire Alarm Fridge door Alarm Frost Alarm Heating System Thermostat Infra-red Level Detector Infrared Alarm Infrared beam barrier/ proximity sensor Infrared emitter and infrared Reciever IR Remote Control Extender Circuit IR transceiver 1.0 Light Barrier Detector Light switch Light/Dark Detector Live-line Detector Low Voltage Alarm Magnetic proximity sensors Mains Remote-Alert Melody generator for greeting cards Metal Detector Metal Detector Police Siren Power supply failure alarm Proximity Alarm Rain Alarm Remote Doorbell Warning Switch Room Noise Detector Sound Operated Switch Temperature Sensor with Digital Output Theft preventer alarm Touch Switch II Tough switch Ultra-simple Voltage Probe UltraSonic Radar Ultrasonic switch Voice activated switch Water Level Indicator with alarm Telephone related Audio Visual Ringer Conversation Recorder Cordless phone backup Cut Phone Line Detector Detector of cellular phone incoming call FM Telephone Bug Having secrecy in parallel telephones Multipurpose Circuit for telephone Off line Telephone tester Phone "Hold" With Music Phone Broadcaster Phone Busy Indicator Phone line indicator Ringing Phone Light Flasher Simple Phone Tap Smart Phone light Soft Musical Telephone Ringer Telephone amplifier Telephone Audio Interface Telephone call meter using calculator & COB Telephone Headgear Telephone Hold Button Telephone line based audio muting and light on circuit Telephone line monitor Telephone Line Vigilant Telephone Number Display Telephone Ringer using 556 dual timers The Link 4+0 Ц Internal Intercom The Link A2B+1 (the Link Telephone Intercom - DTMF version) The Link Telephone Intercom Ц Every Home Should Have One! The Original 2 Phone Link Design Two line intercom plus a telephone changeover switch Test and measurement Inductive meter adapter 12V Lead-Acid Battery Monitor 1GHz Simple Frequency Counter A simple Remote control Tester AC Line Current Detector Audio level meter (vumeter) Beeper to find short circuits Capacitance Meter Car Water Temperature Contactless Mains Voltage Indicator Continuity Tester Crystal Tester Decibel Meter Digital Voltmeter Digital Voltmeter Electronic Thermostat and Relay Circuit Frequency Comparator Function Generator High Resistance Voltmeter IR Remote Control Tester Latching Continuity Tester Led display digital Voltmeter Linear Resistance Meter Mosfet TESTER Oscilloscope testing module (huntron circuit) Picoammeter circuit with 4 ranges Thermostat for 1KW Space Heater (SCR controlled) Transistor Tester Triangle / Squarewave Generator Voltage follower with 1G ohm input resistance Voltage Monitor XTal Tester XTal Tester Zener Diode Tester Video and TV 4 Stage 555 Timer for Video Cam Control Audio / video switch Composite color video signal travels on twisted-pair cable Driver for Multiple VGMonitors Isolation between antenna network and TV/radio equipment LH0032 Video Amplifier S-video to composite video adapter The Video / Audio Distribution Amplifier UHF Preamplifier Video Clock and Message Generator Video Distributor Amplifier Video Line Selector Video monitor adapter enhances oscilloscope Video multiplexer uses high-speed op amps Video Signal Amplifier Video Switch Video/Audio Wireless Transmitter Total 538 pages Circuits & schematics Audio Automotive Games and entertainment Microcontrollers Miscellaneous Models and model remote control Motor, light and power control Oscillators and timers PC related Power RF circuit Robotics Security and other sensors and detectors Telephone related Test and measurement Video and TV Electronics guide The very first steps On the boards Measuring current and voltage Capacitors ICs, oscillators and filters Diodes I Diodes II Transistors Analogue integrated circuits Digital integrated circuits I Digital integrated circuits II Copyright © 2017 - www.elshem.com