Domestic circuit
Simple version. Full version location at http://circuitsradio.com
View original of this circuit: http://circuitsradio.com/schematics/electrical-engineering/Domestic/index.html
(RF) remote control encoder/decoder (PIC projects)
1.5 Volt Strobo with a Kodak Max Disposable Camera. How to modify a Kodak Max Disposable Camera Flash Circuit and build a 1.5 volt supply STROBO. (Yes! just using a 1.5 volt AA alkaline battery!!)
220V live wire-in-wall scanner
220V mains monitor. With this circuit you will be able to monitor the quality of the mains. (simple)
28 LED Clock Timer
5 to 30 minute Timer
555 Monostable Circuit
8 Relay module
9 Second Digital Readout Timer
9 Second LED Relay Timer
A Clock Doubling Circuit (500KHz) for CMOS logic
A frequency meter metal detector. We have designed the metal detector, the principle of operation which one differs from the classic schemes (BFO, transmit-receive known as two-boxes metal detector, inductive). Our device has a simple design and one has the quite good characteristics.
Accurate Electronic Stop-Watch
Acoustic Tone by command
Air flow detector
Air Ionizer (Negative ion Generator)
Aircore (Metal detector theory) (162 Kb)
Appliance Timer
Asymetrical Timer
Auto Reset Over/Under Voltage Cut-Out
Automatic door opener (PIC projects)
Automatic Room Power Control
AUTOMATIC TEMPERATURE CONTROLLER
Baby Watch out
Bachelor project. Computerised house control. Room control. Wide physical dimension measuring range (temperature measuring range from –10 to +50 0C, light intensity measuring range from dark to high brightness)
Backup Lamp (11k) Dont get caught in the dark again!
Basic infrared TX-RX (IR) (simple)
Bathroom Deoderizer Control - That box you see on the wall in public washrooms. This is the type that has a little DC motor fan positioned above a small container containing a deoderant liquid or jelly, and runs off a D cell. The photocell turns off the fan when it gets dark. The LED flashes if the battery is good.
Battery Saver (161k) Automatically turns off flashlights, toys and other devices operating on voltage as low as 3 volts.
Bedside Lamp Timer. 30 minutes operation. Blinking LED signals 6 last minutes before turn-off
BFO Theory (Metal detector theory) (59 Kb)
Bootstrp/ PLL ( Phase Locked Loop) (Metal detector theory) (33 Kb)
Ceiling Fan Speed Control - For one of those 3 or 4 blade decorative fans.
Cheap 40KHz clock
Cheesemd1 (Metal detector theory-BFO) part1 (181 Kb)
Cheesemd2 (Metal detector theory-BFO) part2 (328Kb)
Clap Switch
Clock Divider Circuit
Color Organ Light - Flashes coloured christmas type lightbulbs to music. This circuit works REALLY well. Notice how it will fire even in complete silence. This provides a sort of automatic gain control.
Computerize Your Room/Home
ConjuringTrick- Domino Box
Constant Brightness LED Stroboscope - For measuring the speed of small motors
Control 120VAC relay with TTL
Dark Activated Switch or Porch Light Switch
DC Push Button Motor Control Circuit
Deer Repellent (18k) This seismic sensor can detect and frighten away intruders.
Delayed Off Light Switch - Rated for use with incadescent loads. This is an unusual design in that it uses plain metal gate CMOS logic instead of the usual PIC or a custom chip. The 22uF capacitor charges up during one half of the ac cycle, and supplies trigger current to the triac on both halves.
Deoderizer Fan Pushbutton Timer - A battery operated fan blows air accross a stinky pad. For use in a bathroom or car. Ive seen similar circuits used in plastic pot-pourri containers.
Digital Clock with MM5314N
Digital Combination Lock
Digital ping - pong [2]
Digital ping-pong [1]
Digital Roulette with Display
Digital Switching System
Digital Timer Light Switch
Dome Lamp Dimmer (16k) Efficiently dim the cars dome or map light.
Domestic heating control circuit
Doorbell with Counter
Doorphone Intercom
Dynamic lights (12C508A) (Christmas)
ECG amplifier
Electronic lock
Electronic Night Light
Electronic On/Off Touch Switch
Electronic relay (simple)
Electronic Scoring Game
Electronic selection for 8 sources
Electronic selection for 8 sourses with 2 push buttton [Up/Down]
Electronic selector for 10 sources with Display 7-segment
Electronic Thermostat Relay Circuit
Electronic Touch Dimmer
Electronic Whistle
ElectronicI Ching. This circuit is the electronic emulation of the I Ching, a form of divination originating in China. (simple)
Electroscope
ELF monitor
Event counter
Fire Alarm
Five projects for April Fools Day! (77k) Build a mysterious lamp, maddening dripper, TV remote control blocker, rattle box, and a truly smelly project.
Flashing Heart
Flashlight Timers - Childrens flashlights often have timers to preserve battery life
Fools day
Four/Five Channel RC Cars - TX and RX circuits using metal gate CMOS instead of custom chips.
Fridge Alarm (9k) Alerts you when the refrigerator door is left open.
Fridge door Alarm. Beeps if you left open the door over 20 seconds. 3V battery operation, simple circuitry
Frost Alarm or Cold Activated Switch
Full-duplex doorphone with 3 wires connection.
Galloping Neons (20k) Build a line-powered array of blinking neon lamps.
Garage Door Opener Scanner
General IR receiver
Generating Long Time Delays
Hand Clap Lamp Control
Headlight Reminder Circuit
Heartbeat transducer
High and Low Voltage Cutout with Delay and Melody
Hot Water Tank Indicator
IBM PC joystick
IC Controlled Emergency Light with Charger
Infra Red Remote Control Extender (IR)
Infra Red Vision System for a Toy Car
Infrared gate 2. This is an infrared gate with two sensors planned to use in the wall in the way behind a door.
Infrared Remote Control
Intelligent switch
IR Remote Control
Lamp Dimmers
Latching relay driver
LED boost switcher - Single AA cell powers two LEDs at constant current
LED buck PFM - Powers LED with constant current starting at 100mV over Vf
LED Christmas lights
Light Activated Relay
Light Detector Circuit
Light sensitive and differedial temperature switch
Long delay timer (simple)
Long period timer
LOW COST AUTOMATIC GATE LIGHT WITH A MUSICAL BELL
Low drop linear voltage regulators (article from National Semiconductors)
Low frequency clock
Magic Wand Conjuring Trick
Mega phone circuit 9v
Melody Door Ringer
Metal Detector
Metal Detector Description James Trevelyan (Metal detector theory)
Microwave Oven Transformers- Power (XFMRs)- Tesla Coil (includes A Typical Microwave Oven Schematic)
Morse practice oscillator
Negative ion generator
Neon Desklamp
Nifty Original Ideas: / Test Probes Too Big? / Wristwatch Hell / Phone Line Indicator
Over and under voltage switch with relay
Periodic Timer
Phase Failure Relay
Photo Flashes at 1.5 volts
Pine Racecar Victory Judge
Plants Watering Watcher. Varying brightness LED signals the necessity to water a plant. Very low consumption, 3V
Power-Off Time Delay Relay Circuit
Precision 1Hz Clock Generator using Chip-on-Board
Press Button Switch Debouncer
Programmable door-bell with flashing LEDs
Programmable light relay
PROGRAMMABLE MUSICAL BELL
PROGRAMMBLE PRIORITY TIME SWITCH
Radio Controlled 3way Light Switch
Radio Controlled Remote Control
Rain Detector (15k) Stick this out the window instead of your hand. Weather Circuits.
Ramp Controlled Light
READY-TO -USE OBJECT COUNTER
Rechargeable Led Flashlight. This is the project of rechargeable flashlight using a high intensity red Jumbo Led. The main idea is to have a moderate source of light that will be ever at hand, without batteries to replace or light bulbs to change. It may be left plugged in the 110 vac wall outlet, ready for use.
Relay delay circuit
Relay timer switch
Remote Doorbell Indicator
Robot wars: start here!
SamClock RINGER and drive external load
SamClock [Digital Clock]
SamGordon Digital Clock
Sensitive Temperature Switch
Shower Stopper (24k) By request! This gadget throws cold water on long showers.
Signal and Tone Activated Relay Switch
Simple Intercom Circuit
Simple RC Cars - Single channel Transmitters and Super Regenerative Receivers at 27MHz and 49MHz
Single-ic Decoy Switch
Soft Musical Telephone Ringer
SOFT MUSICAL TELEPHONE RINGER
Soft-touch Bi-directional Motor Driver
Solar power battery charger
Solar power supply
Solar sun tracker
SOLIDATE RELAY WITH UNDER/OVER VOLTAGE PROTECTION
Sound Activated Toys
Sound Operated Switch
Sound triggered flash. If you wish to take a picture of a fleeting event which generates a sound, you can do it with this sound activated trigger. (simple)
Strain gauge sensor
Stud Sensor Automatic - This is the old discrete component design, now superceded by a PIC.
Switch on delay circuit
Telecom Headset
Temperature Monitor
Temperature window switch
The microwave oven
Thermometer and thermostat for Room temperatures
Thermostat
Three channel snap
Time delay circuit
Time Delay Relay
Time Delay Relay Circuit
Time Delay Relay II
Time Switch
Timed Beeper. Beeps for 7.5 seconds after a presetted time. Adjustable time settings: 15 sec 30 sec 1 min 2 min and others
Timer with Buzzer and Optocupler
Timer: delay on de-energise
Timer: delay on energise
Timer: pulse output
Tiny RC Cars TX and Charger
Touch Activated Lamp
Touch operated changeover switch
Touch switch
Touch Switch
Touch-Sensitive Musical Bell with Timer
Transistor relay driver
TV Scavenger Hunt Game A game show timer is at the heart of this fun TV watching game.
Ultra Low Drop Linear Regulator
Ultrasonic motion detector
Ultrasonic Pest Repeller - These emit noise to confuse or agitate insects or animals
Ultrasonic receiver
ULTRASONIC SWITCH
Underground Radio - How to use conductive soil (underground water table) to transmit audio or radio signals. During World War II there were situations were conventional radio was useless, either because enemy jamming or just for hidding purpouses; thus, radio operators forced off the air, tried a different aproach... underground radio. Although its obviously a less efficient system, it works perfectly well if we find a good conductive sheet beneath.
Unusual Radar Detector - This unique anchient design uses a chopper amplifier
Variable Frequency Ultrasonic Pest Repeller
Visual metronome
Voltage window switch
Wall Clock Governor Drivers - These were common before the advent of quartz controlled stepping motor clocks.
Wall Wart Information
Watch on PIC.
WATER LEVEL CONTROLLER USING 3-PHASE STARTER
Whistle Switch. Remote control by whistling. Turn appliances off and on.
Wide rage auto turn OFF timer
Wiper Speed Controller
View original of this circuit: http://circuitsradio.com/schematics/electrical-engineering/Domestic/index.html