Proximity detector electronic project circuit design

Posted on Feb 6, 2014

A very simple proximity detector can be made using this electronic scheme. This electronic circuit reacts to the presence of a conductive object within a particular field. Circuit sensitivity can be adjusted with potentiometer P1 for the desired distance. The electronic circuit consists essentially of a monostable oscillator and a tipping stage. O

Proximity detector electronic project circuit design
Click here to download the full size of the above Circuit.

scillator is built with transistor T1. This is why a flap that oscillator frequency is particularly stable, because the capacity of the transistor is in parallel with relatively large capacities C1 and C2 of the oscillating circuit. Surface acts as a sensor oscillator circuit capacity of, capacity may be small in comparison with C1 and C2. in this configuration, the oscillator operates at about 1 MHz. High frequency signal is amplified and eventually rectified. In this way receives a control pulse to monostable tipping stage consisting of T3 and T4. By using VFET`s possible to order the relay switching by tipping stage. Switching time is determined by adjusting potentiometer P2.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Dual over-under temperature monitor
    Reflex Radio Receiver
    Protected Intrinsically Safe Op Amp Circuit
    Combustible Gas Detector Circuit
    Single Capacitor Powers Audio Mixer
    Expressive Arduino Midi Sequencer
    Circuit diagram 500mW FM PLL transmitter 88-108MHz using LMX3206 and PIC16F870
    NCP5080 Xenon Photoflash Capacitor Charger With Photo Sense Interface
    1998 DeVille: front power windows work ok left front window switch
    very simple VCA circuit
    811A produced by 10W tube final amplifier