| +5v Powered Charge Pump Battery Charger 0.5v Negative Supply
1 Amp Current Injector
1 Watt Fluorescent Lamp Night Light
1.5v LED Flasher Version A
1.5V Touch Activated Switch
10 Amp UL Ground Resistance Tester
10 LED Sequential Flasher using Low Power
10 Second Ultra Lower Power Oscillator
10 Turn Pot Forms Frequency Readout
100ma Current Source
10mhz to 20mhz Laser Light Detector
10Mhz to 20Mhz Light Receiver
120 VAC Low Voltage Alarm
120 VAC Touch Switch
120VAC Under Voltage Tester
125Khz LC Oscillator
125Khz Oscillator from CMOS Inverters
125khz Wireless Smart Key Detector
12kv Power Supply
12v Battery Load Cutout Circuit
12v Battery Voltage Monitor-Expanded Scale
12v Cooling Fan Thermostat
12v Lamp Current Indicator
12v Light/Dark Lamp Switch
12v to 19v Laptop Power Supply (Concept)
12v Touch Switch Exciter Circuit
12v-24v AC & DC Day/Night Switch
175Khz Inductive Pulse Receiver
175Khz Inductive Pulse Transmitter
18v AC to DC Power Supply
1us Light Pulse Receiver
1uS Light Pulse Receiver + Post Amp
1w Solar Cob LED Light
1W Solar Path Light with COB
2 Line Telephone Line Status Indicator
2 Transistor Oscillators
2.45ghz RF Signal Detector
20 LED Night Light
200Mhz-400Mhz Voltage Controlled Oscillator (VCO)
20ma Current Loop Tester
20Mhz VCSEL 3mw Laser Test Circuit
2-12v Battery Isolator Circuit with a LTC4412
240VAC to 5VDC Power Supply
240VAC Touch Switch
24v NiMH
Battery Charger using a 12v Solar Panel
2uS Light Pulse Receiver
3 Minute LED Closet Light
3 Volt Low Battery Voltage Flasher
30 LED Night Light
300v Peak to Peak Signal Generator
30Khz Light Receiver Amp
32Khz Ultra Low Power Crystal Oscillator
36-Hour Watchdog Timer
3Khz Low Pass Filter Plus Audio Amp
3-Minute Closet Light
3-Minute Closet Light #2
3v 2hz Oscillator
3v Battery Powered White LED Driver
3v Capacitance Proximity Switch
3v Powered Loud Beeper
3v Sweeping Siren Alarm
4 Line Telephone Line Status Indicator
40Khz Laser Burst Detector
40Khz LED Test Signal Generator
40Khz Light Detector with High Ambient Light Immunity
40KHz Light Detector with Sunlight Immunity
40Khz Light Receiver Amp
40KHz Light Receiver Front-End Circuit
40KHz Limiting Amp
40KHz Modulated Light Detector
40khz TV-VCR Light Source Repeater
40Khz Ultrasound Receiver
40Khz Voltage to Frequency Converter
4-20ma Current Loop Tester
5 Volt Momentary Operation Touch Switch
50/60Hz Sync Generator-Fully Isolated
50Mhz Broad Band Optical Fiber Receiver Version A
555 Timer Forms Simple Circuit PWM Motor Controller
5Mhz Broad Band Optical Fiber Receiver
5v Capacitance Touch Activated Momentary Switch
5w Fluorescent Lamp Intensity Modulator
6v NMH/NiCd Battery Tester
6V to 24V DC Day/Night Switch
8 Solar Cell LED Light
8-Solar Cell Lithium Ion Battery Charger Version 2
9v Battery Eliminator
9v Battery Voltage Monitor
9v Powered Xenon Photoflash Controller
9V Pulse Generator
9v Solar Panels Converted to 4.5v Panels
AC Current Controls Hour Meter
AC Line Under/Over Voltage Alarm
AC Power Line High/Low Voltage Tester
AC Power Loss Alarm
AC to DC Power Supply requires Low Power
Acceptable Voltage Indictor
Accurate Low Capacitance Meter
Accurate One Shot Pulse Generator
Active AC Power Line Indicator
Active Low Pass Filter Designs
Advertising Badge #1 with Flashing LED
Advertising Badge #2 with Flashing LED
AIR Transparency Monitor, Xenon Flash Receiver
AIR Transparency Monitor, Xenon Flash Transmitter
AIR Transparency Monitor-Pg2
Alarm Beeps when the “Check Engine” Light Turns On
Alarm Sounds At Freezing Temperatures
Alarm sounds when Water is Detected
Alarm-Piezo Device Detects Motion
Alkaline Low Battery Voltage Indicator
Alternating CW & CCW Motor Driver
Amplifier for a Xenon Lamp Flash Detector
Another Very Loud piezo Alarm Beeper
Audio Activated Switch
Audio Amp + 3Khz Filter
Audio Frequency Digital Noise Generator
Automotive Electrical Voltage Indicator
Bad Light Bulb Indicator
Band Drummer’s Microphone Switch
Basement Doorbell Beeper
Battery Amp-hour Capacity Tester
Battery Charge Current Indicator
Battery Eliminator
Battery Free LED Flasher
Battery Polarity Reversal protects Circuit
Battery Powered Plus-Minus 15v Supply
Beeper that is Very Loud
Bidirectional DC Current Indicator
Bidirectional Solid State Relay
Broad Band 2Mhz Optical Fiber Receiver
Broken Solar Panels
Brush Motor Speed 12V Controller
Button Battery Cell Internal Resistance Measurement Circuit
Camera Shutter Time Measurement
Candle Power
Capacitance-Type Liquid Level Monitor
Caps Provide Voltage Boost to Series Regulator
Car Ignition 12v Switch
Cascode Light Receiver Circuit
Chain Link Fence Alarm
Charge Coupled Bi-Directional Power MOSFET Relay
Charge Coupled MOSFET Relay #2
Charge Pump Efficiently Divides Supply Voltage
Charging a 24v Battery Charger from a 12v Source
Cheap Close-Up Camera Lens |
Cheap Light Power Meter Chicken Coop Door Opener with Timer
Circuit Forms Divide By 1.5 Counter
Circuit Forms Ideal Diode Function
Circuit Indicates Battery Charge Current
Circuit indicates Battery Charging Current
Classic Linear 5v Supply using 6.3vAC Transformer
Classic Plus & Minus DC Power Supply
Clear Fluid Detector #2
Clear Fluid Monitor
Click Sound Generator
Closet Light with Automatic 3-Minute Timeout
CMOS Inverter 125khz LC Oscillator
CMOS Inverter Parallel LC Oscillator
CMOS Logic Inverter Amplifier Characteristics
CMOS Nand Gate Forms Gated 125Khz Oscillator
CMOS Schmitt Trigger IC Makes VCO
Coin Operated Telescope
Color Film Makes Optical Filter
Computer Controlled Power Relay
Computer Controlled PWM Circuit
Constant Current LED Driver
Convert Solar Powered Light to Flasher
Corona Monitor
Crystal Controlled 1KHz Signal Generator
Current Indicator for Battery Chargers
Current Injector
Cut Phone Line Alarm
Darkroom Camera Shutter Timer
Day/Night Switch-24vAC Powered
DC Brushless Motor Monitor
DC Current Indicator #4
DC Current Indicator 6
Delayed Pulse Generator
Detect the narrow 1uS pulses
Detects Shadow Activated Motion
Digital Counter using Pedometer
Digital Counter using Pedometer
Do It Yourself Portable Cell Phone Charger
Does Power Line have 120 VAC or 240 VAC?
Doggie Water Dispenser Alarm
Door Knob Alarm
Door Knock Beeper
Drive a LED with an Intensity Ramping Mode
Dusk To Dawn Latching Relay
DVD Recorder + TV Camera Make Cheap Data Logger
Earthquake Alarm Circuit
Earthquake Alarm Circuit
Electric Field Disturbance Monitor-Alarm Discriminator + Battery Monitor
Electric Field Disturbance Monitor-Front End + Power Supply Circuit
Electrical Current Indicator
Electrical Device Harvests Earthworms
Electrodeless Water Level Monitor
Energy Harvesting using a Current Transformer
Expanded Scale 12v Battery Voltage Monitor
Fake Car Alarm Light
Fake TV Camera Flasher
FET Input High Speed Light Detector
Finger Tap Piezo Relay
Finger Touch Activated Switch
Flashing LED Power Indicator
Freeze Alarm
Freezer Over-Temperature Alarm
Freezing Temperature Alarm
Full Wave Rectifier
Garage Door Timer
Generate 0.5v Negative Supply
Hand Wave Motion Detector
High Ambient Light Immunity Light Detector
High DC Current Indicator
High Intensity Line Powered LED Flasher
High Pass Active Filters
High Power LED Flasher
High Power Touch Switch Exciter Circuit
High Sound Output Beeper
High-speed 75MHz light receiver
HO Train Lighthouse Flasher Revisited
Homemade Corner Cube Reflector
Honeybee Counter
Human Footstep Alarm
Human Traffic Footstep Detector Preamp
Illuminated 16vAC Doorbell Lamp Replacement
Improved Solar LED Spot Light
Improved Solar Path Light
Incandescent Lamp Inrush Current Limiter
Indicates when it is Time to Dust
Indicates when it is Time to Dust
Inductor Self-Resonance Tester
Infrared Reflected Light Switch
Infrared Safety Switch
Infrared TV/VCR Remote Booster
Insolation Solar Monitor
IR Remote LED Indicator Light
Isolated AC Current Monitor
Isolated AC Voltage Spans 0VAC to 280Vac
Isolated Power Supply for Digital Panel Meters
Isolated Remote Switch Circuit
JFET High Impedance Buffers
Knocking rings Doorbell
Laser Diode Tester
Laser Used as Vehicular Traffic Counter
Laser/LED Light Output Intensity Meter
Lead-Acid Battery Low Voltage Indicator
LED Camping Lantern with Dimmer
LED Driver using Constant Current
LED Driver-Wireless
LED Pilot Light powered by AC Line
LED Strings powered by AC Line
Light Detectors with Ambient Light Compensation
Light Intensity Monitor
Light Intensity Monitor
Light to Frequency Converter
Light/Dark 12V Switch
Lighthouse LED Flasher
Line Powered 60hz Clock Generator
Line Powered High Intensity LED Flasher
Line Powered White LED Array
Line Status Indicator for 1 Telephone Line
Line-Powered Xenon Flash Transmitter
Lithium Battery Tester
Lithium Ion Solar Battery Charger-#2
Logic Controlled 12v DC Motor with Automatic Brake
Long Period Computer Watch Dog Timer
Low Frequency Oscillator draws only 2 Nanoamps
Low Power 100khz Light Receiver
Low Power AC to DC Power Supply
Low Power Amp Monitors Light
Low Power H Bridge Motor Controller
Low Power Universal LED Flasher
Low Value Capacitance Meter
Low Voltage H-Bridge
Low Voltage Latch Circuit
Low Voltage Latching Relay Driver
Low-power optical interrupter
Machine Power Loss Beeper
Machine Vibration Triggers Hour Meter
Make a Geophone to Detect Foot Steps
Medium Power 125khz Oscillator
Medium Power 125khz Oscillator #2
Medium Power 40Khz Ultrasound Transducer Driver
Micro Power 40Khz Burst Laser Diode Driver
Micro Power Over-Temperature Alarm
Micropower CMOS Oscillator, Draws Only 0.5ua
Miniature 24VAC Isolated +5V Supply
Miniature 5v Line Powered Isolated Supply |
Miniature Isolated AC/DC Power Supply Miniature Lighthouse Light Simulator
Miniature Pushbutton On/Off Switch
Mm5437 Noise Generator
Model Airplane Wing Tip Flasher
Modified 4 D Cell LED Lantern
Modified Cheap Solar LED Path Light
Modified Colman Lantern3
Modified LED Night Light
Modified Shake to Charge Flashlight
Modulated Light Monitor #1
Modulated light receiver circuit
Monitor Clear Fluids
Monitor Water Seepage
Monitor Water Seepage
Monitors Pump Motor
Motorized Duck Decoy Timer
Moving AIR Indicator
N-Ch & P-Ch Transistor Form Push-Pull Driver
Night Light from White LED
Non-Isolated Off-Line AC to DC Power Supply
Non-Isolated Off-Line AC to DC Power Supply
NPN/PNP Transistor Tester
Ocean Wave Power Generator Demo Unit
On/Off Flip/Flop Circuit with Automatic Timeout
On/Off Latch Circuit
On/Off Latch Circuit with 2 Second Delay
On/off Pushbutton Switch with 30 Minute Timeout
On/Off Switch with Latching Relay
One Shot (D-Flip/Flop) Circuit
Optical RFID Test Circuit
Photo Transistor interface Circuit
Piezoelectric Tap Switch
Piezoelectric Triggered Switch
Piezoelectric Vibration Sensor Activates Switch
Plastic Pipe Finder
Poor Man's Timer
Poor Man's Timer
Pop Free Microphone On/Off Switch Circuit
Pot Controlled Variable LED Intensity Circuit
Power Reminder Beeper
Power Supply-24 Volts AC to 24 Volts DC
Precision 40Khz Triangle Generator
Precision AC Peak Detector
Precision Fullwave Rectifier
Pulse Period to Voltage Converter
Pulsed LED Test Circuit
Pushbutton Activates Service Request Beeper
Pushbutton Controlled Up/Down Ramping Light
Pushbutton Oneshot & Latch
Pushbutton On-Off Latch Circuit
Pushbutton Switch works through Glass
PWM Circuit for Motor Speed Control
Radio Tower Lamp Monitor
Ramping Lamp Driver
Ramping LED Driver
Rapidly Stops DC Motor Drive
Reduce voltage to Photovoltaic Solar Panel with Ideal Diode
Reduced Power Relay Driver
Reduced Power Sequential LED Flasher
Remote Doorbell Beeper
Remote Range Extender TV/VCR
Remote Relay Driver
Remote TV Camera Power
RS232 Data Bus Status Monitor
Safety Light
Scare Off Pigeons
Self-Powered AC Current Indicator
Servo Pulse to Voltage Converter
Servo Pulse to Voltage Converter
Simple Circuit for White LED Night Light
Simple Circuit Nitrogen Spark Generator
Simple Circuit Wire Security Loop Alarm
Sink to Source Universal DC Converter
Small Battery Capacity Tester
Small Pushbutton Controls 10 Amps AC
Snow Depth Alarm
Solar Cell Test Fixture
Solar Fireflies In Jar Light
Solar Insolation Monitor
Solar Insolution Meter
Solar Lithium Ion Battery Charger using LT1129
Solar Mason Jar Light
Solar Path Light Improvement
Solar Path Light Improvement
Solar Powered Cell Phone Charger
Solar Powered Flood Light using NiMH
Cells
Solar Powered Infrared 1W Security Camera Illuminator
Solar Powered Lighthouse
Solar Powered Lithium Ion Battery Charger
Solar Powered Lithium Ion Battery Charger
Solar Powered Quartz Clock
Solar PV Cell Test Fixture
Solar-Powered Pump Motor Controller
Solid State Relay Requires Only 50ua Drive Current
Solid State Relay that is Bidirectional
Sound Triggered Night Light
Square Wave Driver Has Flexible Outputs
Star Trek Doorbell
Super Bright 3v Powered LED Flasher
Supercapacitor Voltage Limiting Circuit
Table Lamp with Auxiliary 12v Automotive Style LED Light
Temperature Sensor MOSFET
Temperature Sensor with 4 to 20ma Current Loop
Tester for Modulated Light
Thermocouple Temperature Activates Relay
Tool Shed LED Light
Triangle Signal Generator
Two Pushbutton Motor Controller
Ultra Low Current 3v LED Flasher #3
Ultra Low Current Oscillator
Ultra Low Current Oscillator #4
Ultra Low Power Astable Multivibrator
Ultra Low Power Human Finger Detector
Ultra Low Power Latching Relay Circuit
Ultra Low Power LED Flasher
Ultra Pure 125kHz Sine Wave Signal Source
Under/Over Voltage Alarm on AC Line
Universal Flasher using a Latching Relay
Universal-3v-LED-Flasher
Unplugged Appliance Alarm
Unplugged Power Cord Alarm
Version a of 1.5v LED Flasher
Vertical Lifting Security Gate Power Source
Very Loud Pulsating Beeper
Very Low Power Astable Multivibrator
Very Low Power Gated Crystal Oscillator
Very Low Voltage Oscillator Circuit
Video Signal Edge Enhancements
Voltage Boost
Voltage Converters-0.5 to 6 Volts
Voltage Limiting with a Supercapacitor
Voltage to Frequency Converter + 1us LED Pulse Driver
Water Cistern Level Alarm
Water Filling Station Controller
Water Flowing in Pipe Indicator
Water Seepage Monitor
Watt-Hour Meter Monitor
Wave Power Generator Demo System
Well Pump Flasher & Beeper
White LED is Powered By One NiMH
Cell
White LEDs powered by 24V
Wide Band Zero Cross Detector
Wig/Wag LED Flasher
Wireless LED Flasher
X100 Scope Probe
Xenon Lamp Flash Detector Amplifier |
