Circuits


Do it yourself Circuits

NOTE-2

FA707

 

 

 

ALARM CIRCUITS

  1. ENTRY ALARM
  2. FIRE ALARM 1
  3. FIRE ALARM 2
  4. HEAT SENSOR 1
  5. HEAT SENSOR 2
  6. INTERRUPTION ALARM
  7. MUSICAL BURGLAR ALARM
  8. RAIN ALARM
  9. SHADOW ALARM

AMPLIFIER CIRCUITS

  1. FET PRE AMPLIFIER
  2. IC LA 4440 STEREO AMPLIFIER

BATTERY CIRCUITS

  1. BATTERY MONITOR

BEGINNER’S CIRCUITS

  1. COUNT DOWN TIMER
  2. DANCING LIGHT
  3. ELECTRONIC MAIL BOX
  4. INTERCOM
  5. SENSITIVE CLAP SWITCH
  6. TEMPERATURE METER
  7. TOUCH SENSITIVE SWITCH

BIO-ELECTRONIC CIRCUITS

  1. STRESS METER

CHARGER CIRCUITS

  1. HIGH CURRENT CAR BATTERY CHARGER
  2. SIMPLE BATTERY CHARGER
  3. TRICKY CHARGER FOR CAR BATTERY

HOME UTILITY CIRCUITS

  1. AQUARIUM PROBE
  2. AUTOMATIC BATHROOM LIGHT WITH BACK UP
  3. AUTOMATIC NIGHT LAMP WITH MORNING ALAM
  4. CHILD’S LAMP
  5. CLOCK TIMER
  6. DC ADAPTER FOR CAR
  7. HEAT CONTROLLED SOLDERING STATION
  8. LIGHT DIMMER
  9. NON CONTACT POWER MONITOR
  10. PEN CELL CHARGE INDICATOR
  11. PEST CHASER
  12. PICNIC LAMP
  13. REMOTE OPERATED MASTER SWITCH
  14. TV GUARD
  15. USB READING LAMP
  16. WATER LEVEL CONTROLLER
  17. WATER LEVEL INDICATOR

INDICATOR CIRCUITS

  1. LOGIC STATE INDICATOR
  2. LOW BATTERY INDICATOR
  3. SHORT CIRCUIT INDICATOR
  4. THREE STATE VOLTAGE INDICATOR

IR CIRCUITS

  1. INFRARED RECEIVER
  2. IR RECEIVER
  3. REMOTE JAMMER

LED CIRCUITS

  1. DIAC CONTROLLED LED FLASHER
  2. LOW COST LED PILOT LAMP
  3. MOCK FLASHER FOR HOME
  4. POWER ON MONITOR

MOBILE PHONE CIRCUITS

  1. FRIENDLY CHARGER FOR MOBILE PHONE
  2. MOBILE BUG
  3. MOBILE CELL PHONE CHARGER
  4. MOBILE CHARGER USING BIKE BATTERY
  5. MOBILE PHONE TRAVEL CHARGER
  6. MOBILE SHIELD
  7. USB MOBILE CHARGER

MUSIC CIRCUITS

  1. MUSICAL DOOR BELL
  2. POLYPHONE DOOR BELL

POWER SUPPLY CIRCUITS

  1. BENCH POWER SUPPLY WITH SHORT CIRCUIT INDICATION
  2. MINI UPS SYSTEM
  3. PORTABLE POWER SUPPLY
  4. REGULATED POWER SUPPLY
  5. STABILIZED POWER SUPPLY WITH SHORT CIRCUIT INDICATION
  6. VARIABLE POWER SUPPLY

PROJECT CIRCUITS

  1. SERVO CONTROLLER

PROTECTION CIRCUITS

  1. AMPLIFIER PROTECTOR
  2. EMERGENCY LAMP BATTERY PROTECTOR

RADIO CIRCUITS

  1. FM MODULE WITH USB FUNCTION

RF & OSCILLATOR CIRCUITS

  1. 1 HZ PULSE GENERATOR
  2. 38 KHZ OSCILLATOR
  3. GIGA HERTZ SIGNAL DETECTOR
  4. PRECISION MONOSTABLE

SECURITY CIRCUITS

  1. ANTI-BAG SNATCHING ALARM
  2. FRONT DOOR GUARD
  3. LAPTOP PROTECTOR
  4. LIGHT FENCE
  5. LOCKER GUARD
  6. MAT SWITCH
  7. MID NIGHT SECURITY LIGHT
  8. MOVEMENT DETECTOR
  9. NIGHT ALERT
  10. PANIC ALARM
  11. PYROELECTRIC FIRE ALARM
  12. SECRET BELL
  13. SEISMIC SENSOR
  14. SHADOW ALARM
  15. SHUTTER GUARD
  16. TRAFFIC ALERT
  17. WIRE FREE DOOR GUARD

SENSOR CIRCUITS

  1. CURRENT SENSOR
  2. HIGHWAY ALERT SIGNAL LAMP
  3. PHOTO DIODE LIGHT SENSOR
  4. PYROELECTRIC FIRE SENSOR

SOLAR CIRCUITS

  1. HYBRID SOLAR CHARGER
  2. SIMPLE SOILAR LAMP
  3. SOLAR CHARGER WITH CUT OFF
  4. SOLAR CHARGER

TELEPHONE CIRCUITS

  1. TELEPHONE GUARD
  2. TELEPHONE LAMP
  3. TELEPHONE STATUS INDICATOR

TESTER CIRCUITS

  1. SIGNAL TESTER FOR TV CABLE

WHITE LED CIRCUITS

  1. AC POWERED WHITE LED LAMP
  2. HIGH POWER LED LAMP

9 responses to “Circuits

  1. my stress meter circuit is not working.When it is connected to battery,one led is glowing just for a fraction of second and then it just go off.Please suggest what I have to do

  2. hello sir,

    I made count down timer but with a supply voltage of (3*AAA cell = 4.5v) and load is 1 watt led.
    But there is no precision in timing as calculated.I had to turnoff led after 6 hours.so what should I do to get the precise timing.

  3. Thanks for the circuits and it will be more helpful if you could mention the approximate cost and insert the picture of components like UJTs with its leg. thank you

  4. I have a mosquito bat of YPD china make. As it is not working I opened it, found there is no step-down transformer. but Ni-Cd cells are there for charging. their connections were snapped. When plugged into AC some shorting is there and when tested with tester total circuit is having AC. Can you explain me the circuit and possible way of repairing it?

  5. Dear sir,

    I am using FM circuit with USB function kit last long time.Is it possible to fix it as usb function? If it is then give your reply to my mail ID with its connections.

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