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- Category: Alarm
- Doorbell Ringer Birdie Tone
- Simple Smoke Alarm using Photo Interrupter Module
- Simple Electronic Siren Based LM358
- Smart Vibration Sensor Alarm
- 70W OCL Power Amplifier
- 12 Stage Water Level Indicator
- Light Alarm with Timer 555
- Car Audio System Anti Theft Security
- Aquarium Temperature Probe
- Laptop / Notebook Protector
- Car Anti-Theft Protection with Buzzer
- Simple Mat Alarm Switch
- Light Fence with LDR
- Water Level Indicator using 7 Segment LED
- Notebook Anti Theft Protector
- Musical Bell with Touch Switch
- Power Supply Failure Alarm
- Shutter Guard
- Automatic Switch-Off Staircase Light
- Cheap Motorcycle Alarm
- Fire Alarm with LDR Sensor
- Heat Detector + Siren
- Multitone Siren Alarm
- Pyroelectric Fire Alarm System
- Adjustable Analog Timer
- LPG Gas Leakage Sensor Alarm
- Electronic Siren based NE555
- Beeper Sound
- Easy Build Motorcycle Alarm
- Sound Effect Generator UM3561
- Touch Alarm System
- Car Headlight Alarm
- Wireless Car Alarm
- Car Alarm Simulator
- Wailing Alarm Siren
- British Police Car Siren
- Safer Security System Alarm
- Flame, gas and smoke detector
- Simple Fire Alarm with Thermistor and NE555
- DIY Simple Multitone Alarm
- Door Knob Touch Alarm
- Emergency Light + Alarm
- Sound Effects Generator (8 different sound) based IC HT2884
- Electronic Bird Chirp Sound Generator
- Electronic Siren
- Category: Audio
- Small Sound Amplifier for Ears (Hearing Aid)
- Two Tone Train Horn based NE556 Dual Timer
- Low Cost Electronic Rat Repellent
- Sine Wave to Square Wave Converter
- Metronome Sound Generator
- 2000W Class AB Power Amplifier
- Power Amplifier 2000 Watt
- 1.5W Audio Amplifier with IC SSM2211
- 24W Audio Amplifier (Class A)
- Simple 3 Channels Mini Audio Mixer
- 35W Power Audio Amplifier based LM391
- 18W Audio Amplifier
- Digital Variable Resistor / Potensiometer DS1669
- Smart Sensitive Electronic Hearing Aid
- Infrared (IR) Cordless Headphone
- Stereo Digital Volume Control
- Electronic Horn
- Ticking Bomb Sound Generator
- Cheap Hearing Aid
- Hi-Fi Compressor with Pre-emphasis
- Western Music Generator based IC HT82207
- M66T Melody Generator
- Small Audio Booster
- Mesa Boogie Dual Rectifier
- Surround Sound Decoder
- Dynamic Mic Compressor
- Passive Surround
- Mic Compressor
- Echo Chamber + Robot Voice Effect
- Turbo Bass
- Six LED Stereo VU Display
- PCM2706 USB Sound Card
- Audio Mixer + VU Meter
- Echo Chamber
- Stereo VU Booster
- 80W Audio Amplifier Using TDA7295
- 60W Power Audio Amplifier based on TDA2052
- TDA7383: 4 x 35W Quad Bridge Amplifier
- 140W Power Amplifier with STA5100
- 32W Hi-Fi Audio Amplifier with TDA2050
- 2x25W Stereo Power Amplifier with STK4141II
- 2 x 100W Stereo Power Amplifier with STK4231II
- 2 x 30W Audio Amplifier with STK-465
- 50W Power Amplifier with STK-1050
- 35W Power Amplifier with STK-082
- 2x7W Audio Amplifier with LM4756
- 2 x 1.2W Dual Power Amplifier with KA2214
- 2 x 5.8W Stereo Power Amplifier with KA2211
- 20W Hi-Fi Power Amplifier with TDA2040
- 60W AF Amplifier With STK-0060II
- 50W AF Power Amplifier with STK4036II
- 50W Audio Amplifier with TDA1514A
- 2 x 12W Stereo Amplifier with TDA1521/TDA1521Q
- 50W Power Amplifier with IC TDA7294
- 6-10W Audio Amplifier with IC TDA2002
- 6-10W Stereo Audio Amplifier with IC TDA2005
- Simple Bench Amplifier
- UHF TV Antenna Booster
- 2 x 22W Stereo Car Audio Amplifier with TDA1553CQ
- 80W Power Audio Amplifier with LM12
- Dynamic Microphone Amplifier
- 22W Stereo Power Amplifier with TDA1554
- FM Wireless Microphone
- 68W Power Amplifier with LM3886
- Stereo Tone Control with LM1036
- 20 Band Graphic Equalizer
- 70W High Power Amplifier with MOSFET
- 2x10W Audio Amplifier with TDA2009A
- Pre-Amp + Tone Control with TDA1524A
- 18 Watt Audio Amplifier with HA13118
- 7 Watt Audio Amplifier with IC TDA2003
- 2x1W Stereo Amplifier with IC KA2209
- 1W Stereo Audio Amplifier using LM386N
- 1W Audio Amplifier with TDA7052
- 100W Audio Amplifier with Transistor BDW83D/BDW84D
- 300-2500Hz Audio Bandpass Filter
- Electronic Buzzer with IC timer NE555
- Low Noise Portable Mic Preamp
- HiFi Audio Pre-amp
- 4W Audio Amplifier using Transistor TIP41
- “Hum” Remover
- 50 Watt Power Audio Amplifier
- Stereo Electret Mic Preamplifier
- 5W Tube Amplifier with EL84
- 35W Tube Power Amplifier with EL34
- Portable Audio Amplifier
- 100W RMS Audio Amplifier
- 2 Watt Mini Audio Amplifier
- 200 Watt High Quality Audio Amplifier
- 800W Audio Amplifier with MOSFET
- Low Impedance Microphone Amplifier
- 25W HiFi Audio Amplifier with MOSFET
- 20 Watt Stereo Audio Amplifier using TDA2005
- Loudspeaker System Crossover Network
- Category: Equalizer
- Category: Filters
- Category: Guitar Effects
- Guitar Synthesizer Schematic Diagram Collection
- Bass Guitar Preamp Pedal
- Stage Center Reverb Guitar Effect
- Electro-Harmonix Soul Preacher
- Tube Sound Fuzz Mods
- DOD Overdrive Preamp 250
- Octave Fuzz Pedal – Guitar Effects Unit
- UniVibe Pedal
- Univox Super-Fuzz Pedal
- Vox Tone Bender Pedal
- Gibson RD Artist Guitar
- DOD FX75 Flanger Guitar Effect Pedal
- Electro Harmonix Fuzz-Wah Guitar Effect
- Electro-Harmonix Small Stone Phaser Guitar Effect
- Tube Head Pre-amp
- Orange 125MK3 Guitar Mods
- Motion Filter Effect
- Jimi Hendrix Fuzz Face Pedal JH-2
- Dallas Arbiter Fuzz Face
- Maestro Boomerang Pedal
- Guitar Pre-Amp with JFET 2N5457
- A/B Box Switch 2 Inputs 1 Output with Dual Op-Amps
- Distortion Booster
- VOX Treble Booster Effect
- Tube Distortion Pedal
- Theremin Music Instrument
- BOSS Slow Gear SG-1
- Electro-Harmonix Big Muff Pi Effect
- Dan Amstrong Blue Clipper Fuzz Guitar Effect
- Axe Grinder Electric Guitar Effect
- Harmonic Sweetener Guitar Effect
- Angry Beard III Electric Guitar Effect
- Dan Armstrong Green Ringer Guitar Effect
- Category: Linear Amplifier
- 200W MOSFET Amplifier based IRFP250N
- 300W RMS Stereo Power Amplifier based IC TDA7294
- 100W Power Amplifier Based IC TDA7294
- 120W Power Amplifier + Power Supply
- 200W Power Amplifier Using Transistor
- 400W RMS Stereo Power Amplifier
- 250W RMS Power Amplifier Legend Stage Master
- 500W RMS Power Amplifier Based MOSFET
- 12W Audio Amplifier based MOSFET 2SK135 / 2SJ50
- Mic Condenser Amplifier
- 150W Power Amplifier
- 1500W Power Amplifier
- 65W Power Amplifier using HEXFET
- 4W Bridge Amplifier using LM388
- 1W Stereo Headphone Amplifier based TDA2822
- LM4809 105mW Stereo Headphone Amplifier
- Stereo Tube Amplifier 4 Watts
- 4W Stereo Amplifier using LM2877
- TDA8929T Class-D Audio Power Amplifier
- MOSFET Linear Amplifier 300W/50MHz
- Transistored 10W Audio Amplifier
- 16W Bridge Amplifier using LM383
- 400W Power Amplifier “Safari”
- 20W Power Tube Amplifier with EL34
- 140W Power Amplifier
- 2 x 5W Stereo Audio Amplifier based TA7227 + Tone Control
- 300W OCL Power Amplifier
- 7W Audio Amplifier based TBA810
- 4W Audio Amplifier based TDA1013B
- 100W Power Amplifier based LM3886
- 20W Bridge Amplifier using TDA7240A
- 2 x 70W Power Stereo Amplifier based on IC STA550
- TDA7381 4 x 25W Quad Audio Amplifier
- 10W Audio Amplifier with TDA1910
- 25W Hi-Fi Audio Amplifier based LM1875
- 2 x 3W Stereo Audio Amplifier with IC BA5406
- 20 Watt Audio Amplifier with LM1875
- Category: Mixer
- Category: Pre Amplifier
- Category: Speaker
- Category: Tone Control
- Category: Tube Amplifier
- Category: Car Circuits
- Category: Communication
- Home Telephone Call Recorder
- Simple Sensitive Tester for Infrared (IR) Remote Control
- Remote Control Tester
- Long Range/Distance Infrared Transmitter
- Low-Cost and Simple Intercom
- Toy Car Remote Control
- Laser Communication (Transmitter – Receiver)
- Telephone Switcher
- Telephone Amplifier using LM386
- Cut Phone Line Detector
- Two Station Intercom based on LM386
- Ultrasonic Sensor Switch
- Category: Computer Related
- Category: Digital Circuits
- Category: Fun Circuits
- Low Cost Mosquito Repellent
- Bicycle Directional Lights
- Electronic Quiz Button Table
- Scoring Display with 7 Segment LED
- Clap On / Off Switch
- Traffic Baton with Bulb or LED Flasher
- Electronic Dice Based Microcontroller Atmel AT89C2051
- Electronic Candle Circuit using TTL IC
- Ding-Dong Door Bell
- Simple Traffic Light Controller
- Door Bell with Flashing LEDs
- Portable 230V Lamp Flasher
- White Line Follower
- 220V AC Lamp Touch Dimmer
- Telephone Ringtone Generator
- Automatic Light Controller
- Switched ON Bike Lamp
- Lantern Dimmer and Flasher
- Eight Sound Effects Generator
- Insect Repellent
- 220V Light Dimmer
- Sound Activated Switch
- 220V LED Flasher
- 3V Lamp Brightness Controller
- Motor Speed Control with MAX4295
- LED Flasher with LM3909
- LED Color Fade Effect
- Running LEDs
- Sound Generator with IC 555
- Touch Switch
- 10 Dancing LEDs
- Analog Flip-Flop
- LED Flashing Heart
- Category: LED and Light
- Category: Microcontroller
- Category: Misc
- Triac, SCR, Transistor Tester
- Protector for Electronic Appliance with Three-Phase Power
- Indicator Circuit for Mains 220V Blown Fuse
- Connection Tester
- Diode Zener Tester
- Static Circuit Breaker / RFI Eliminator
- Water Level Indicator with Single 7 Segment LED Display
- Electronic Appliance Protector
- Simple Electronic Muscular Stimulator
- Why You Might Want Train Horns
- Simple Battery Level Indicator
- Low Cost Water Pump Controller
- Electronic Motor Starter
- Audio/Video to UHF TV Signal Converter (Modulator)
- Logarithmic Amplifier LM11C
- Safe Constant Current Source
- Load Cell Amplifier
- Solid State Relay
- 12V Lead-Acid Battery Monitor
- Simple Electronic Combination Lock
- Adjustable Sine/Square Wave Oscillator
- 220V Touch Switch
- Tone Detector / Sound Activated Switch
- Mini Voice Operated Relay
- Basic Monostable Multivibrator based IC timer 555
- Category: Motor Related
- Category: Phone Diagrams
- Category: Power Electronics
- Digital DC Voltmeter based ICL7107 Chip
- Solidstate Automatic Power-Off on Mains Failing
- 3A Switching Power Supply Regulator
- Current Output Multiplier for 78xx Regulator
- 3A Switching Voltage Regulator based LM317HV
- 1.5V and 9V Battery Tester
- 0-24VDC Digital PIC Power Supply
- 12VDC to 9VDC Converter
- Bench Power Supply I
- Hobby Power Supply
- 3V-30V/3A Adjustable Regulated Power Supply
- Active DC Voltage Doubler
- Dual Output Stabilized Power Supply
- 13.8 Volt 20 A Transformerless Power Supply
- 0-30V Stabilized Variable Power Supply with Current Control
- Basic UPS Circuit 5V and 12V DC
- Category: Battery Charger
- 6V and 12V Car Battery Charger
- Adjustable Regulated Battery Charger
- 6V / 9V / 12V Battery Charger with Constant-Current Charging
- Battery Charger + Small LED Lamp based Solar Cell / Photovoltaic
- 12V 4A Solar Photovoltaic Battery Charger
- Cell Phone Shield with Charger
- Simple Mobile Phone Battery Charger
- Automatic Switching-on Emergency Light
- Car Cigar Lighter to USB Power Socket
- Solar Powered Mobile Phone Battery Charger
- Automatic 9V Battery Charger
- 6V Gel Cell Battery Charger
- NiCAD Battery Charger with Current and Voltage Limiting
- Lead-Acid Battery Charger
- 200mA/Hour – 12V NiCAD Battery Charger
- 12V Car Battery Charger
- Lithium Battery Charger
- NiCd – NiMH Battery Charger
- Category: DC Converter
- Category: Inverter
- Report: DC/AC Pure Sine Wave Inverter
- Mini UPS Project
- 8W Fluorescent Lamp Inverter based ZTX652
- 1000W Power Inverter
- 100W Inverter 12VDC to 220VAC
- 5W Simple Inverter
- 25W Low Power Inverter
- Basic Theory of DC to AC Inverters
- 100 Watt Inverter 12VDC to 220VAC with Mosfet
- 300Watt Inverter DC 24V to AC 220V
- 50W Inverter 12VDC to 220VAC
- Basic Inverter
- Power Inverter 60W 12V DC to 230V AC Using 2N3055
- Simple Inverter 12V DC to 120V AC
- Power Inverter 100W, 12V DC to 220V AC
- Inverter 12V DC to 240V DC
- Category: Power Supply
- 0-60V / 0-2A Variable Power Supply
- Adjustable Symmetric 1 to 24VDC, 1A Power Supply
- 5V DC Regulated Power Supply with Short Circuit Protection
- Variable / Adjustable DC Power Supply 1.2V – 25V using LM338K
- 4-Output Stage (5V/6V/9V/12V) Stabilized DC Power Supply
- 5V Regulated Power Supply with OverVoltage Protection
- 5V Regulated Solar Cell Power Supply
- 3-Rail (+12V) / (+5V) / (-5V) Regulated Power Supply
- Basic Dual Polarity Power Supply
- 5V/10A 50W Offline Switching Power Supply
- PNP Boost for Positive Voltage Regulator
- Low Forward-Drop Rectifier
- 6A / 0-28V Variable Power Supply
- 6-12V Variable Regulated Power Supply
- Category: Solar Cell
- Category: Radio
- Handy Talky HT DIY Schematic Diagram
- Active FM Booster
- 2KM Long Range FM Radio Transmitter
- 2W RF Amplifier with MOSFET LF2810A
- Shortwave (SW) Transmitter with IC BEL1895
- 25 Metres Range, Short Wave AM Transmitter
- Good Quality 500M FM Transmitter
- 4 Stage FM Transmitter
- Easy Build FM Transmitter
- Two Chips AM Radio Receiver
- 1.3W RF Amplifier
- 4 Watts FM Transmitter
- 4 Transistors FM Transmitter
- 2 Transistor Mini FM Transmitter
- FM Voice Transmitter
- 4 Transistor FM Tracking Transmitter
- Easy FM Tracking Transmitter
- Sensitive FM Transmitter
- FETs based Micro-Spy
- Simplest RF Transmitter
- Very Simple Radio Control (R/C)
- FM Receiver Antenna Amplifier
- Mini MW Transmitter
- 250mW RF Power Amplifier
- One Transistor FM Receiver
- FM Receiver with TDA7021T
- One Chip AM Radio Receiver
- Three Stage 9V FM Transmitter
- Basic RF Oscillator
- AM Radio Receiver
- 9V FM Radio Transmitter
- 100W RF Amplifier with BLY94
- 15W FM RF Amplifier with 2SC2539
- Active FM/AM/SW Radio Receiver Antenna
- 15W FM Transmitter using BLY88C
- Mini FM Transmitter
- Mini AM Transmitter
- Mini FM Transmitter with 2 Transistors
- 1.5 Watt FM Transmitter
- Category: Robot Circuits
- Category: Security
- Category: Sensor
- Category: Service / Repair
- Category: Video
Downloads
- Guitar Synthesizer3
- Guitar Synthesizer 2
- Guitar Synthesizer 1
- PDF Manual Simple Siren Circuit Kit
- PDF Manual Unipolar Stepper Motor Driver Kit
- Bipolar Stepper Motor Driver Manual Kit
- Audio/Video Modulator - Valleman Kit
- Line Following Robot Tutorial ATMega16
- Two Chips AM Radio Kit
- 5 Band Graphic Equaliser Project
- NE5532 PDF Datasheet
- LM833N PDF Datasheet
- TEA2025 Datasheet
- Inverter Circuit for Soldering Iron
- Ultrasonic Movement Detector Circuit Project
- Home Telephone Call Recorder Circuit Project
- SK133, SK134, SK135 Datasheet
- 2SJ48, 2SJ49, 2SJ50 Datasheet
- 125MK3 Guitar Mods Scheme
- LM4809 Datasheet Document
- LPG Gas Leakage Sensor Alarm Project Report
- USB Power Socket Project
- Automatic Light Controller Circuit Project
- Four Stage FM Transmitter Circuit Project
- Long Distance IR Transmitter Circuit Document
- Color Detector Circuit Project
- 230V Lamp Flasher Project
- EH Small Stone Phaser Scheme
- FX75 Stereo Flanger Scheme
- EH Fuzz Wah Circuit Design
- Univox Super-Fuzz Circuit Design
- Univibe Pedal Circuit Design
- Guitar Effect Octave Fuzz
- DOD Overdrive Preamp 250 Circuit Design
- 1 Hz Clock Generator Circuit Document
- ADC0808/ADC0809 Datasheet Document
- Analog to Digital Converter Circuit Document
- Automatic Emergency Light Project
- DC Motor Controller Project Kit
- Inverter 12VDC to 240VDC Project
- AN-1118 - 5V to 12V DC Converter
- Hex Sound Fuzz Guitar Effect
- LH0032 Datasheet Document
- DC/AC Pure Sine Wave Inverter PDF Document
- Dan Amstrong Blue Clipper Circuit
- Electro-Harmonix (EH) Big Muff Pi
- Angry Beard 3 Guitar Effect Circuit
- TA7227 Datasheet
- TBA810 Datasheet
- TDA1013B Datasheet
- LM3915 Datasheet
- PCM2706 Datasheet
- Car Headlight Alarm Circuit
- Electronic Transistor Ignition For Cars
- Mini Voice Operated Relay
- Line Tracker Robot AVR ATmega8535
- Car Alarm Simulator Kit Manual
- 250mW RF Power Amplifier Manual Kit
- STA550 Datasheet
- TDA7240A Datasheet
- Sound activated switch kit manual
- Light Dimmer Kit
- STK4141II Datasheet
- TDA2050 Datasheet
- TDA1910 Datasheet
- 50MHz / 300W MOSFET Linear Amplifier
- STA5100 Datasheet
- TDA7383 Datasheet
- TDA2052 Datasheet PDF
- Theremin Gitar Effect Circuit
- Maestro Boomerang Circuit
- A/B Box Switch Circuit Pedal
- Simple Mixer Circuit Diagram
- Distortion Booster Circuit Diagram
- Vox Treble Booster Effect
- LS7220 Datasheet - MOS digital lock circuit
- Tube Overdrive/Distortion Pedal
- Tube Mic Pre Amplifier
- Tone Booster Circuit
- BOSS Slow Gear SG-1 Effect
- Theremin Gitar Effect Circuit
- Basic Tone Control Circuit Diagram
- 4 Band Equalizer Circuit
- Axe Grinder Pedal Circuit Diagram
- Harmonic Sweetener Effect
- Fender Bassman 5F6-A Amplifier Circuit
- Mesa Boogie Dual Rectifier Schematic
- Mesa Boogie Dual Rectifier
- LM358 Datasheet
- Jimi Hendrix Fuzz Face Circuit
- Fuzz Faxe Dallas Arbiter Circuit
- LM317HV Datasheet
- Tube Head Pre-amp Circuit
- DS1669 Datasheet
- 2N2219 Datasheet
- 2000W Power Amp Schematic PDF
- MTH40N05 Family Datasheet
- TDA2052 Datasheet PDF
- TDA7381 Datasheet PDF
- TDA7295 Datasheet PDF
- STK4231II Datasheet
- STK-457, 459, 460, 461, 463, 465 Datasheet
- STK-1050 Datasheet
- STK-075, STK-077, STK-078, STK-080, STK-082, STK-083 Datasheet
- 0-24VDC PIC Power Supply
- LM4756 Datasheet
- TDA2002 Datasheet
- 6-10W Audio Amplifier with IC TDA2002
- 50W Hi-Fi Power Audio Amplifier based TDA7294
- TDA7294 Datasheet
- TDA7021T Datasheet
- TDA1521Q Datasheet
- One Chip AM Radio Receiver
- MK484 Datasheet
- Kam Leang Robotics - Sonar Ranging System
- KA2214 Datasheet
- KA2211 Datasheet
- TDA2040 Datasheet
- MAX4295 Motor Speed Control
- TDA1514 Datasheet
- Three Stage FM Transmitter
- STK-0060II Datasheet
- STK4036II Datasheet
- 9V FM Transmitter Circuit Manual
- Two Station Intercom
- TDA2005 Datasheet
- 6-10W Stereo Audio Amplifier TDA2005
- LM1875 Datasheet
- 25W Hi-Fi Audio Amplifier based LM1875
- LF2810A Datasheet
- TDA1553CQ Datasheet
- LM12 Datasheet
- 2SC2539 Datasheet
- FM Wireless Microphone
- TDA1554Q Datasheet
- LM3886 Datasheet
- Bench Power Supply xp620
- 3-30V 3A power supply circuit manual
- Hobby Power Supply
- SSM2211 Datasheet
- 20 Band Equalizer Graphic Equaliser
- Adjustable Symmetrical Power Supply
- CD74HC4017 Datasheet
- Preamp and Tone Control with TDA1524A Manual
- TDA1524A Datasheet
- TDA2009A Datasheet
- 10W Stereo Power Amplifier TDA2009A
- TDA2003 datasheet
- 7W Amplifier Circuit TDA2003
- 18W Power Audio Amplifier
- HA13118 Datasheet
- 1W Stereo Amplifier using LM386N
- LM386 Datasheet
- 3W Stereo Audio Amplifier
- BA5406 datasheet
- 2 x 1W Stereo Amplifier
- KA2209 Datasheet
- 1W Audio Amplifier
- TDA7052 Datasheet
- Troubleshooting and Repair of CD/DVD/Bluray-Disk Drives
- UPS with PIC17C43 Microcontroller
- Stereo Valve Power Amplifier
- The ABC\'s of DC to AC Inverters
Good information and I just like the layout and theme of your website too. I hope this site keeps growing and you still build it.