Proximity Detectors Block Diagram Using TDA161

This is a circuit that illustrated the Proximity Detectors Block Diagram using TDA161 from ST Semiconductor. The TDA161 is a monolithic integrated circuits produced and designed by ST semiconductor to be used for metallic body detection by sensing variations in high frequency Eddy current losses. This is the figure of the circuit...

Proximity Alarm Circuit

This is a design circuit for proximity circuit that can be used in alarm circuit. This is the figure of the circuit; Inverters U1a and U1b are connected in a simple RC oscillator circuit. The frequency is determined by the values of R1, C1 C2 and the internal characteristics of the integrated circuit. As long as the circuit is oscillating, a positive dc voltage is developed at the output of the voltage-couple...

Ambient Light Ignoring Active Motion Detector Circuit

This is a design circuit for motion detector uses the same basic concept as the active infrared motion detector. An interruption in a 5 kHz modulated pulsating beam that is transmitted by an infrared diode and received by an infrared transistor sets off the alarm. This is the figure of the circuit; The circuit on the left is the transmitter circuit that establishes a 5 kHz modulated infrared beam....

Active IR Motion Detector Circuit

Here’s the circuit that can be used to detect motion in an area where there are not supposed to be any moving objects using ultrasonic motion detector. This type of motion detector is most commonly used in burglar alarm systems since they are very effective in this application. This is the figure of the circuit; There are tw1o transducers: one emits an ultrasonic wave and the other picks up reflections...

Magnetic Proximity Switch Circuit

This is a design circuit of a magnetic proximity switch that finds a lot of applications in many fields. The circuit is based on a magnetic reed switch(S1) as the proximity sensor. A mono stable multi vibrator based on NE555 (IC1) and a toggle flip flop based on CD4013 (IC2) does the rest of the circuit. This is the figure of the circuit;  When a magnet is reached in proximity of S1 it closes...

Solar Relay Circuit

Here’s a design circuit for solar relay. This is a simple design circuit. This is the figure of the circuit; This is the operating principle of the solar relay. The trick to this apparently rather simple circuit consists of using a suitable combination of components. Instead of a power FET, it employs a special 12-V relay that can handle a large load in spite of its small size. This relay must have...

Analog Signal From Proximity Circuit

Connecting the output of the ir proximity circuit to the analog input to the Arduino board to create an analog value. In this example, that value controls the rate at which an LED blinks. We connect three wires to the Arduino board. The first goes to ground from ir proximity circuit. The second goes from 5 volts of the circuit. The third goes from the output pin of the circuit to analog input 2 on...

Pressure Transducer Bridge Monitor Circuit Using AD620

This is a circuit for a 3kOhms pressure transducer bridge that operates on a 5V single supply is shown in the figure below. This is the figure of the circuit; In the circuit like this, bridge consumes only 1,7mA. The using of AD620 and a buffered voltage divider allows the signal to be conditioned for only 3.8mA of total supply current. Where small size and low power become more significant, the...