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  • TONE_BURST_GENERATOR

    2014-11-05 08:11:3197

    One section of 556 dual timer is connected as mono MVBR and other section as oscillator. Pulse established by mono turns on oscillator, allowing genera...

  • Humidity Sensor with the H14DL

    2014-11-05 07:28:0991

    A humidity sensor with temperature compensation built-in. Never apply a DC voltage to the sensor, even measuring the sensor with an ohmmeter will damag...

  • Simple Electric Field Detector

    2014-11-05 07:25:59154

    The circuit will come handy when you have to follow the mains wires buried in the wall or even water pipes provided they are not too far away (2-4cm ma...

  • The luminous flux test circuit with optical resistors

    2014-11-05 03:18:5966

    This is a luminous flux test circuit with optical resistors. In the circuit, the optical resistor RG forms a bridge with RP1,RP2,R1 and R2; RP1 is used...

  • 2N222 Transistor As Temperature Sensor

    2014-11-05 02:55:56176

    This is a simple Electronic thermometer circuit. This is a inexpensive circuit because probe or sensor that is used in this circuit is 2N2222 silicon t...

  • A brief overview of Allegro ACS712 current sensor. Part 1 -

    2014-11-05 02:42:06345

    Sensing and controlling current flow is a fundamental requirement in a wide variety of applications including, over-current protection circuits, batter...

  • Vortex Sensor Structure Diagram Circuit

    2014-11-05 02:20:5275

    The picture shows the vortex sensor structure diagram circuit.In the picture, the part 1 is the primary coil and the part 2 and part 3 are secondary co...

  • Two-Wire Temperature Sensor(LM35)

    2014-11-05 02:13:31107

    This article describes the Two-Wire Temperature Sensor (LM35). The principle is very simple, very practical. The circuit components can help you unders...

  • Motion Detector Sensor Circuit

    2014-11-05 02:03:16548

    This circuit is a motion detection sensor, this circuit uses a light source and detector as a sensor infrared motion detector. Motion sensor using infr...

  • Pressure sensor excitation circuitry diagram

    2014-11-05 00:58:3964

    The figure 1 is a pressure sensor excitation circuit. Figure1(a) is generic constant voltage excitation circuit, it is composed of Zener diode VD1, ope...

  • Touch switch circuit composed of the photoelectric coupler

    2014-11-05 00:51:5069

    Working principle: The circuit which is composed of the capacitance C5, the regulator tube VDW, the diode VD2, the capacitance C4 and the resistance R6...

  • Electric light touch switch circuit

    2014-11-05 00:38:5875

    The circuit principle is as shown, the photoelectric coupler is composed of the neon tubes N1 and N2, the photoresistor RG1. When the hand touches the ...

  • ELECTROMAGNETIC_FIELD_SENSOR

    2014-11-04 23:32:4384

    A telephone pick-up coil is used as a sensing coil. Any 60-Hz hum picked up by the sensing coil is rectified, amplified, and detected, and then drives ...

  • Voltage and Temperature Sensor Using MAX6652, a Datasheet

    2014-11-04 21:16:1575

    The following information contain MAX6652 datasheet, a system supervisor that monitors multiple power-supply voltages and features anon-board temperatu...

  • Ultrasound Detector with 567PLL and LM386 ICs

    2014-11-04 20:36:00264

    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 fr...

  • sound detector switch

    2014-11-04 20:31:34119

    When the 555 ic goes into timing mode (triggered by an output signal from the sound detector amplifier,) the timer`s output (pin 3) is set into HIGH fo...

  • The Good Helper for Pressure Sensor ? DIY Force Sensitive Re

    2014-11-04 17:05:1876

    Do you wish to have a thin, accurate and durable Force Sensitive Resistor (FSR) to help you to sense the surface pressure? Well, would you want to spen...

  • RE200B Pyroelectric Passive Infrared Sensor

    2014-11-04 16:52:23929

    Firstly, the amplifier circuit is chosen as indicated in RE200B manual, shown as below. However, the R1, C1 and C2 are eliminated because the voltage s...

  • Laser light detector

    2014-11-04 15:13:52134

    The laser light detector utilizes a sensitive photo transistor (Q5) placed at the focal point of a lens (LE2). The output of Q5 is fed to a sensitive a...

  • Fire_siren

    2014-11-04 15:06:3470

    This LM3909 circuit produces a rapidly rising wail upon pressing the button, and a slower coasting down sound upon release. If it is desirable to have ...

  • MN1220 Memory Integrated Circuit

    2014-11-04 14:07:4288

    MN1220 is memory integrated circuit produced by Matsushita, widely used in televisions, audio equipment, DVD players and so on. 1. FeaturesMN1220 IC is...

  • Control double paper photosensitive circuit diagram

    2014-11-04 13:11:1170

    In the figure, the 6.3V and 2.5V of the transformer are served as light source for indicator light and spotlight electic bulb respectively. When the li...

  • LOW_POWER_MAGNETIC_CURRENT_SENSOR

    2014-11-04 06:53:2173

    A transducer senses a direct current magnetically, providing isolation between the input and the output. The detecting-and-isolating element is a satur...

  • TOUCH DIMMER

    2014-11-04 05:48:4485

    By simply touching this touch dimmer you can increase the light intensity of incandescent lamps in three steps. visit page....

  • Sound Sensor

    2014-11-04 05:39:4587

    By using a microphone, high-gain amplifier (Fig. 37-10(b)), and detector-relay driver (Fig. 37-10(a)) a sound-detecting alarm system can be constructed...

  • Light sensor switch circuit

    2014-11-04 04:05:5181

    This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a cer...

  • O2 sensor meter for car Circuit

    2014-11-04 04:05:2597

    O2 meter for car circuit Welcome back to Free circuit dot com ,Today i would like to show you in about circuit for car . So,All really knows how to cus...

  • Temperature Sensor Current Loop Transmitter

    2014-11-04 01:00:2476

    LM134makes a good temperature sensor because it has a highly linear output characteristic. Because it is a current output device and is therefore not a...

  • Automatic plant waterer

    2014-11-04 00:54:39151

    The unit consists of a sensor, timer, and electric water pump. The sensor is embedded in the soil, and when dry, the electronics operate the water pump...

  • Differential TMP01 Temperature Sensor Transmitter

    2014-11-03 22:21:1079

    This is a TMP01 Temperature Sensor Transmitter circuit. This circuit is used in industrial environments to transmit the signal differentially on a wire...

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