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Flood Sensor with 12F683 – Circuit Schematic
Flood Sensor with 12F683
The water detection time is less than 10 seconds. Since the microcontroller enters a low consumption state between readings to preserve battery life, this state...
PIC16F84A Gas Detector – Circuit Schematic
PIC16F84A Gas Detector
This is a gas detecting circuit capable of sensing many different types of gases. The sensor used is the GH-312 and from the datasheet it is capable of sensing ...
Voltage Sensitive Probe – Circuit Schematic
Voltage Sensitive Probe
This circuit is so sensitive it will detect "mains hum." Simply move it across any wall and it will detect where the mains cable is located. It has a gain of ab...
Voltage Sensitive Probe – Circuit Schematic
Voltage Sensitive Probe
This circuit is so sensitive it will detect "mains hum." Simply move it across any wall and it will detect where the mains cable is located. It has a gain of ab...
Light Sensor Switch – Circuit Schematic
Light Sensor Switch
Light Sensitive Switch is a simple project which operates a relay when the light falling on the LDR goes below a set point. ...
Light Control System (OP295) – Circuit Schematic
Light Control System (OP295)
Sensing unit consists of infrared emitter OP295 to produce the infrared beam, & two detectors in front of the emitter to detect the infrared beam OP598. Since t...
Temperature Controler switch – Circuit Schematic
Temperature Controler switch
This circuit controls a load (in this case a dc brushless fan) based on a temperature compared with a setpoint. THe transduced is a diode in the forward polariz...
Temperature Controler switch – Circuit Schematic
Temperature Controler switch
This circuit controls a load (in this case a dc brushless fan) based on a temperature compared with a setpoint. THe transduced is a diode in the forward polariz...
Heat Sensor Circuit using LM741
The following page outlines detail information on how to step by step design a Simple Heat Sensor Circuit. This circuit design utilized LM741 as the operational...
A Thermostat With Adjustable Hysteresis – Circuit Schematic
A Thermostat With Adjustable Hysteresis
A thermostat doesn't try to maintain a constant temperature. In order to do so - it would have to keep switching on and off every few seconds. Instead - it keep...
Temperature Controlled Relays 4001/4011 – Circuit Schematic
Temperature Controlled Relays 4001/4011
The first circuit energizes the relay when the temperature rises above the preset level. The second circuit energizes the relay when the temperature falls below...
Temperature Controlled Relays 4001/4011 – Circuit Schematic
Temperature Controlled Relays 4001/4011
The first circuit energizes the relay when the temperature rises above the preset level. The second circuit energizes the relay when the temperature falls below...
Light Controlled Relays – Circuit Schematic
Light Controlled Relays
The first circuit energizes the relay when the light rises above the preset level. The second circuit energizes the relay when the light falls below the preset ...
Light Controlled Relays – Circuit Schematic
Light Controlled Relays
The first circuit energizes the relay when the light rises above the preset level. The second circuit energizes the relay when the light falls below the preset ...
Lego Double Rotation Sensor – Circuit Schematic
Lego Double Rotation Sensor
An opto-interrupter made with Lego beams, regular parts, a 6 hole pulley wheel and an axle....
Lego Double Rotation Sensor – Circuit Schematic
Lego Double Rotation Sensor
An opto-interrupter made with Lego beams, regular parts, a 6 hole pulley wheel and an axle....
Ultrasound Detector with 567PLL and LM386 ICs – Circuit Schematic
Ultrasound Detector with 567PLL and LM386 ICs
The bat ultrasounds are picked up by the microphone SPKR1 and go through two stages of amplification at Q1 and Q2. Separately, a tunable (R12) single frequency...
Ultrasound Detector with 567PLL and LM386 ICs – Circuit Schematic
Ultrasound Detector with 567PLL and LM386 ICs
The bat ultrasounds are picked up by the microphone SPKR1 and go through two stages of amplification at Q1 and Q2. Separately, a tunable (R12) single frequency...
Laser beam Sensor – Circuit Schematic
Laser beam Sensor
a more complex detector circuit which turns the relay on for an adjustable period of time. When the beam is broken, the LED goes on, your effect is powered, and...
Laser beam Sensor – Circuit Schematic
Laser beam Sensor
a more complex detector circuit which turns the relay on for an adjustable period of time. When the beam is broken, the LED goes on, your effect is powered, and...