Air flow detection circuit diagram

Published:2014/4/23 20:07:00 Author:lynne | Keyword: Air flow detection circuit diagram

Figure LM335 work is the use of self-heating effects to detect the flow of gas. ST1 placed in still air, lower operating current of approximately 1mA. ST2 placed in the external environment, the operating current is large, about 10mA. ST3 operating current is large, and in the air does not flow from the heat generated during its rise above STl temperature rise, so LM301 comparator inverting input voltage is higher than the non-inverting input voltage. Output is low. When the external ambient air flow, the heat generated ST2 continuously taken away to the surrounding air, so the temperature rise caused by thermal effects from reduced. And then STl in still air, heat transfer is very slow, so the self-heating effects caused by the rise in temperature is greater than ST2, the LM301 comparator output goes high, driven LED lights alarm. By Rp alarm point can be set air flow rate.   (View)

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Using optical emission components detection of small displacement circuit diagram

Published:2014/4/23 20:11:00 Author:lynne | Keyword: Using optical emission components detection of small displacement circuit diagram

Figure oscillating signal generated by the base when the circuit 555 by emitting diode emitting element and a light guide phototransistor added 4538 plastic flip-resonant oscillator output once have tiny displacement of the reflected light intensity changes, multivibrator device will flip the output signal UA changes can be detected from the surface of the small displacement. Guiding light emitting element as shown in Figure small displacement detection circuit diagram:   (View)

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The bidirectional thyristor control for automatic nighttime lighting circuit diagram

Published:2014/4/23 20:17:00 Author:lynne | Keyword: The bidirectional thyristor control for automatic nighttime lighting circuit diagram

Illustrates the use of the circuit shown in the illuminance sensor as a phototransistor. During the day when the great illumination, phototransistor L14C1 conduction. Diode VD3 also conducting, the capacitor C2 drop to zero, the two-way and two-way thyristor trigger tube VD5 VT are not turned on, the lamp is not lit. Conversely, night L14C1 not conducting, there are so ST4 and C2 voltage VT conduction, the lamp will automatically light up.   (View)

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Soft decoding circuit diagram

Published:2014/4/22 21:19:00 Author:lynne | Keyword: Soft decoding circuit diagram

Soft decoding circuit diagram as shown:   (View)

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The doorbell circuit diagram

Published:2014/4/22 21:20:00 Author:lynne | Keyword: The doorbell circuit diagram

The doorbell circuit diagram shown as follow:   (View)

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Ethernet interface circuit diagram

Published:2014/4/21 20:23:00 Author:lynne | Keyword: Ethernet interface circuit diagram

Ethernet interface circuit diagram shown as follow:   (View)

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Ethernet interface circuit diagram- IP101 Network

Published:2014/4/21 20:20:00 Author:lynne | Keyword: Ethernet interface circuit diagram- IP101 Network, IP101

Ethernet interface circuit diagram- IP101 Network as shown:   (View)

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Pyroelectric infrared control IC S9803 circuit diagram

Published:2014/4/21 20:18:00 Author:lynne | Keyword: Pyroelectric infrared control IC S9803 circuit diagram, S9803

Pyroelectric infrared sensor for its anti-interference, high detection sensitivity, wide humidity range, etc. are used in the Pan-theft alarm, industrial and production of automatic doors, sensor lights, automatic valve and so on. > > >S9803 is an integrated circuit designed for pyroelectric infrared sensor supporting the design, the use of CMOS technology. With high performance, consistency, and the external circuit is simple to install and easy to test. Similar products is more complete functional devices. S9803 is a prominent feature: High (1) sensitivity, built-in two-stage amplifier circuit and the gain can be transported humidity compensation circuit. This circuit can suppress infrared interference as warm air stream generated by the false alarm rate, the detection distance of 10m or more. [2) Control time is adjustable. (3) to drive the output thyristors or relays. (4) built-in regulator 3.1V. (5) External CDS sensor. Daytime suppress output. (6) Operating Voltage 4.0 - 5.5V. Current 1mA. (7) For AC power supply control circuit design zero crossing detection and control, so that the load on and off the accused are at the zero crossing of the AC. This not only reduced the impact of the load current, while also eliminating the interference of the power switching device. Reduce pollution power beam. S9803 is the oscillator, counter, PIP detection, signal amplification, clock, zero-crossing detection, temperature compensation, and output control circuit. >   (View)

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S9803 typical application circuit diagram

Published:2014/4/21 20:04:00 Author:lynne | Keyword: S9803 typical application circuit diagram, S9803

S9803 typical application circuit diagram shown as follow:   (View)

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Air condition control circuit diagram

Published:2014/4/20 20:45:00 Author:lynne | Keyword: Air condition control circuit diagram

Air condition control circuit diagram as shown:   (View)

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Antenna circuit diagram

Published:2014/4/20 20:47:00 Author:lynne | Keyword: Antenna circuit diagram

Antenna circuit diagram shown as follow:   (View)

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Ethernet interface circuit - CS8952 Network

Published:2014/4/20 21:17:00 Author:lynne | Keyword: CS8952

Ethernet interface circuit - CS8952 Network shown as follow:   (View)

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Audi A6 rear window electric shutter circuit diagram

Published:2014/4/17 21:31:00 Author:lynne | Keyword: Audi A6 rear window electric shutter circuit diagram

Audi A6 rear window electric shutter circuit diagram shown as follow:   (View)

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Audi A6 heated seats Circuit Diagram

Published:2014/4/17 21:29:00 Author:lynne | Keyword: Audi A6 heated seats Circuit Diagram

Audi A6 heated seats Circuit Diagram as shown:   (View)

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Infrared Circuit Schematic

Published:2014/4/17 21:28:00 Author:lynne | Keyword: Infrared Circuit Schematic

Infrared Circuit Schematic shown as follow:   (View)

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The LM76R pinout circuit diagram

Published:2014/4/17 21:26:00 Author:lynne | Keyword: The LM76R pinout circuit diagram, LM76R

LM76 is an integrated circuit by a digital temperature sensor, I2C serial bus interface and temperature window comparator composition. In the temperature range 70 ℃ ~ 100 ℃ and -10 ℃ ~ +45 ℃, the accuracy of its window comparator serial bus interface is ± 1 ℃. At 25 ℃, LM76CHM accuracy up to ± 0.5 ℃. Its open drain interrupt output (INT) when the temperature exceeds a programmable temperature window is activated, the temperature limit alarm output (T-CRIT-A) in the temperature exceeds a programmable limit the danger temperature (over temperature will damage LM76) valid.   (View)

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Infrared remote monitoring circuit schematics

Published:2014/4/16 20:47:00 Author:lynne | Keyword: Infrared remote monitoring circuit schematics

The circuit shown in Figure can be transmitted over a long distance signal detected target. PC1 infrared diode and phototransistor pair, when a target object or irradiating light barrier diode phototransistor, the phototransistor is turned on in the turned off, and through amplification and second infrared diode and phototransistor and power amplifier for transmission to the load (alarm or lights), the second of the infrared diode and phototransistor pair from the fail-safe action. Infrared remote monitoring circuit diagram shown in Figure:   (View)

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RF circuit diagram

Published:2014/4/16 20:46:00 Author:lynne | Keyword: RF circuit diagram

RF circuit diagram shown as follow:   (View)

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ND-1 produced by human motion detector circuit diagram

Published:2014/4/15 22:50:00 Author:lynne | Keyword: ND-1 produced by human motion detector circuit diagram

ND-1 produced by human motion detector, Figure, when the body is in constant motion when, ND-1 output is high, and through the internal circuit delay, when the body stops moving, ND-1 output into low, C8550 conduction, alarm circuit B to work, sound an alarm, this circuit can be developed into old ambulance alarm, military field ambulance, such as the alarm circuit switch wireless transmitter that can be used stolen object tracker or tracking animals were observed instruments and other electronic alarm and detection devices.   (View)

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ND-1 with output pulse signal application circuit

Published:2014/4/15 22:49:00 Author:lynne | Keyword: ND-1 with output pulse signal application circuit

With the application of ND-1 output pulse signal, shown in Figure, which can be set up in a musical doorbell on the door (or alarm) circuit, when guests knock on the door, ND-1 can trigger pulse output string music ICKD9300 work play a role doorbell, if someone in the door lock picking or unauthorized intrusion, the circuit will be action, play a security role, the power consumption of the entire circuit is UA level, with an oscilloscope to see P2 pin output waveform.   (View)

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