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Cold Sensor – Circuit Schematic
Cold Sensor
Its resistance decreases when the temperature in its vicinity increases above one degree or more. Component: LED,  Buzzer, Transistor, Capacitor, .....
LM319 IC For Thermostat – Circuit Schematic
LM319 IC For Thermostat
This circuit shows about LM319 IC For Thermostat Circuit Diagram. Features: 2 watt potentiometer for triac power control, 10 Meg resistance .....
NE555 IC For Infrared Motion Sensor – Circuit Schematic
NE555 IC For Infrared Motion Sensor
The following circuit shows about Infrared Motion Sensorcircuit diagram. Features: With NE555 IC, The detection zone coverage is 80 degrees .....
Light Activated SwitchCircuit Based On The LM311 IC – Circuit Schematic
Light Activated SwitchCircuit Based On The LM311 IC
The following circuit shows about Light Activated Switch Circuit Diagram. This circuit based on the LM311 IC Features: voltage comparator circuit .....
Plant Moisture MeterCircuit Based On The LM741 IC – Circuit Schematic
Plant Moisture MeterCircuit Based On The LM741 IC
The following circuit shows about Plant Moisture Meter Circuit Diagram. This circuit based on the LM741 IC. Features: meter indicate whether it is .....
LM35 IC Thermal Control – Circuit Schematic
LM35 IC Thermal Control
Description:  LM35 IC Thermal Control Circuit Diagram. Features: LM35DZ detect when the temperature is higher than the preset level, can be used in .....
TLC271 For Temperature Controlled Switch – Circuit Schematic
TLC271 For Temperature Controlled Switch
This circuit shows about TDA1054 For Tone Control Stereo Preamp Circuit Diagram. Features: National Semiconductor LM35 IC, use a semiconductor .....
Optical Trigger Module – Circuit Schematic
Optical Trigger Module
This optical trigger is a general purpose module for use with `standard` 3mm package infrared diode emitters and corresponding matched phototransistors. The emi...
Heat Sensor – Circuit Schematic
Heat Sensor
This simple heat sensor circuit could senses heat from various electronics device like computer, amplifier etc. and generate warning alarm. It could senses heat...
Dark detector circuit using LDR LED – Circuit Schematic
Dark detector circuit using LDR LED
This is a basic dark detector/sensor circuit diagram based on a Photo Resistor (LDR) and few numbers of parts.....
Liquid or Water Sensor Circuit with Alarm – Circuit Schematic
Liquid or Water Sensor Circuit with Alarm
This is just a fun/hobby circuit which can be used as a water sensor circuit or a liquid sensor circuit.What it does is sound an alarm in presence of water/liqu...
Ultrasonic switch – Circuit Schematic
Ultrasonic switch
The transmitter part of the circuit is build around IC1(NE 555). The IC1 is wired as an astable multi vibrator operating at 40KHz. The output of IC1 is amplifie...
Temperature controlled fan regulator – Circuit Schematic
Temperature controlled fan regulator
This fan regulator circuit will automatically control the speed of your fan according to the temperature. Two thermistors (R1 and R2) are used to sense the temp...
Temperature controlled DC fan – Circuit Schematic
Temperature controlled DC fan
Here is a simple circuit based on two transistors that can be used to control the speed of a 12 V DC fan depending on the temperature. A thermistor (R1) is used...
Most Popular Circuits – Circuit Schematic
Most Popular Circuits
A Simple Light activated switch This is the circuit diagram of a light activated switch based on National Semiconductors comparator IC LM 311 and a LDR. The cir...
Water Level Indicator Circuit-Liquid Level Sensor Project – Circuit Schematic
Water Level Indicator Circuit-Liquid Level Sensor Project
A simple Water level indicator project with circuit diagram for home and industry.This water tank level sensor can be used for any liquid level indicator projec...
Proximity Detector or Sensor – Circuit Schematic
Proximity Detector or Sensor
A simple proximity detector (sensor) circuit diagram and schematic is shown and how to make it using proximity detector IC CS2009A-used for metal detector appli...
Sensitive electromagnetic field sensor – Circuit Schematic
Sensitive electromagnetic field sensor
This is the circuit diagram of a very sensitive electromagnetic field sensor which can sense electromagnetic field from 40Hz to 140Hz. The low noise opamp LF351...
Proximity detector using NE567 IC. Switches LED when object comes near the sensor – Circuit Schematic
Proximity detector using NE567 IC. Switches LED when object comes near the sensor
Simple proximity detector circuit based on NE567 IC. Circuit switches an LED when the object comes near the sensor.....
Photo Switch Circuit – Circuit Schematic
Photo Switch Circuit
A simple photo switch circuit using NE 555 IC with diagram and schematic.This photo switch ons a relay when light intensity crosses limit.A light sensor circuit...