Rangkaian Pendeteksi kebocoran Gas

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series of gas leak detection is a series of very useful to reduce the fire hazard in the leakage of gas sebabkan karna. karna time series to detect the existence of this gas, will enable a series of alarms or lights as a sign of danger. this series is suitable in use in the cost of housing karna perakitannya relatively cheap and simple. This alarm uses a gas sensor (TGS 815) that will detect the existence of gas. detection results will affect the relay

Gambar skema rangkaian pendeteksi kebocoran gas

description :
D1-d5: Diode Min 0.5 Ampere
Transformer (Trafo): 0-12 volt 0.5 Ampere
Z: Diode Zener 5,1Volt/0.5 watt

For the other as written in the series scheme

In this series of detention sensor will change when there is leakage. With changes in the value of this detention, the transistor base voltage will be changed (increased base voltage) so that the transistor T1 to be active. when the transistor T1 on, SCR get rigger so SCR on and relay active (change kutup). This relay can be used to control the lights, sirens or ALRM as if there is leakage of gas

this series work better if, in the place near the gas tube. so that in case of gas leakage, can know more in early

Rangkaian Pendeteksi Air Hujan sederhana

type='html'>Rangkain Pendeteksi Air Hujan

circuit of rain detector uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a security system.

Circuit of rain detector

Component list of rain detector

• R1 1K 1/4 W Resistor
• R2 680 Ohm 1/4 W Resistor
• D1 1N4001 Silicon Diode
• BZ1 12V Buzzer
• S1 SPST Switch
• SCR1 C106B1 SCR 106CY
• SENSOR
  

The sensor is a small piece of PC board etched to the pattern showen in the schematic. The traces should be very close to each other, but never touching. A large spiral pattern would also work.

Make sure to use a loud buzzer.

Rangkaian Pendeteksi obyek Dengan Infra Red

type='html'>Infra red (infra red) is the diffraction wavelength elektromagnet more than its visible light is between 700 nm and 1 mm. Infra red rays of light is not visible. If viewed with the light spektroskop the infra red light radiation will be visible on the spectrum elektromagnet with wavelength on the wavelength red light. With this long wave infra red light so it will not appear by the heat radiation, but it still feels embossed / detected.

because the infra red is not visible by naked eye so the idea arose to create a tool pendeteksi movement using infra red this

in the image below is the following circuit diagram of an infrared motion detector that can be used to sense intrusions. Infra red rays reflected from a static object will be in one phase, and the rays reflected from a moving object will be in another phase.The circuit uses this principle to sense the motion.

Skema Rangkaian Pendeteksi obyek Dengan Infra Red

how to work a circuit of Pendeteksi obyek Infra Red
NE 555 is wires as an astable multivibrator . IR diode connected at the output of this IC produces infrared beams of frequency 5Khz. These beams are picked by the photo transistor Q1 . At normal condition ie; when there is no intrusion the output pin (7) of IC2 will be low. When there is an intrusion the phase of the reflected waveforms has a difference in phase and this phase difference will be picked by the IC2. Now the pin 7 of the IC 2 goes high to indicate the intrusion. An LED or a buzzer can be connected at the output of the IC to indicate the intrusion.

Note:

• Comparators IC2a and IC2b are belonging to the same IC2 (LM1458).
• When there is disturbance in the air or vehicles passing nearby, the circuit may get false triggered.
• POT R5 can be used for sensitivity adjustment.

Rangkaian Alarm pendeteksi Api menggunakan LDR

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In the rooms are vulnerable to fire, such as a storage material flammable, required a system of prevention of the occurrence of fire. For example, using a fire alarm, so that eg arise if a flame, can be quickly and by others that can immediately fire it does not cause a fire is greater.

Here is a simple fire alarm circuit based on a LDR and lamp pair for sensing the fire.The alarm works by sensing the smoke produced during fire.The circuit produces an audible alarm when the fire breaks out with smoke.

Skema rangkaian alarm pendeteksi api|kebakaran

Note:

• The speaker can be a 8Ω tweeter.
• POT R4 can be used to adjust the sensitivity of the alarm.
• POT R3 can be used for varying the volume of the alarm.
• Any general purpose NPN transistor( BC548,BC148,2N222) can be used for Q1.
• The circuit can be powered from a 9V battery or a 9V DC power supply.
• Instead of bulb you can use a bright LED with a 1K resistor series to it.

When there is no smoke the light from the bulb will be directly falling on the LDR.The LDR resistance will be low and so the voltage across it (below .6V).The transistor will be OFF and nothing happens.When there is sufficient smoke to mask the light from falling on LDR, the LDR resistance increases and so do the voltage across it.Now the transistor will switch to ON.This gives power to the IC1 and it outputs 5V.This powers the tone generator IC UM66 (IC2) to play a music.This music will be amplified by IC3 (TDA 2002) to drive the speaker.

The diode D1 and D2 in combination drops 1.4 V to give the rated voltage (3.5V ) to UM66 .UM 66 cannot withstand more than 4V.

Rangkaian Pendeteksi (Sensor) Kelembaban Udara

type='html'>Pendeteksi (Sensor) Kelembaban Udara

Dew ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to switch off any gadget automatically in case of excessive humidity. At the heart of the circuit is an inexpensive (resistor type) dew sensor element. Although dew sensor elements are widely used in video cassette players and recorders, these may not be easily available in local market. However, the same can be procured from authorised service centres of reputed companies. The author used the dew sensor for FUNAI VCP model No. V.I.P. 3000A (Part No: 6808-08-04, reference no. 336) in his prototype. In practice, it is observed that all dew sensors available for video application possess the same electrical characteristics irrespective of their physical shape/size, and hence are interchangeable and can be used in this project.

Skema Rangkaian Pendeteksi (Sensor) Kelembaban Udara

The circuit is basically a switching type circuit made with the help of a popular dual op-amp IC LM358N which is configured here as a comparator. (Note that only one half of the IC is used here.) Under normal conditions, resistance of the dew sensor is low (1 kilo-ohm or so) and thus the voltage at its non-inverting terminal (pin 3) is low compared to that at its inverting input (pin 2) terminal. The corresponding output of the comparator (at pin 1) is accordingly low and thus nothing happens in the circuit. When humidity exceeds 80 per cent, the sensor resistance increases rapidly. As a result, the non-inverting pin becomes more positive than the inverting pin. This pushes up the output of IC1 to a high level. As a consequence, the LED inside the opto-coupler is energised. At the same time LED1 provides a visual indication. The opto-coupler can be suitably interfaced to any electronic device for switching purpose. Circuit comprising diode D2, resistors R5 and R6 and capacitor C1 forms a low-voltage, low-current power supply unit. This simple arrangement obviates the requirement for a bulky and expensive step-down transformer.

Rangkaian Pendeteksi Metal

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This is a metal detector circuit used IC CS209A . A 100uH coil is used to sense the presence of metal. The IC CS209A has a built in oscillator circuit and the coil L1 forms a part of its external LC circuit which determines the frequency of oscillation. The inductance of the coil change in the presence of metals and the resultant change in oscillation is demodulated to create an alarm. The LED gives a visual indication too. This circuit can sense metals up to a distance of few inches.

Skema Rangkaian Pendeteksi Metal

Note:
The switch S1 can be a slide type ON/OFF switch.
The POT R1 can be used to adjust the sensitivity of the circuit.



IC CS209A Description

The CS209A is a bipolar monolithic integrated circuit for use in metal detection (Pendeteksi Metal)/ proximity sensing applications. The IC (see block diagram) contains two on-chip current regulators, oscillator and low-level feedback circuitry, peak detection/demodulation circuit, a comparator and two complementary output stages.

The oscillator, along with an external LC network, provides controlled oscillations
where amplitude is highly dependent on the Q of the LC tank. During low Q conditions, a variable low-level feedback circuit provides drive to maintain oscillation. The peak demodulator senses the negative portion of the oscillator envelop and provides a demodulated waveform as input to the comparator. The comparator sets the states of the complementary outputs by comparing the input from the demodulator to an internal reference. External loads are required for the output pins. A transient suppression circuit is included to absorb negative transients

Lay out IC CS209A and diagram blog IC CS209A

Absolute Maximum Ratings
Supply Voltage ................................................................................................24V
Power Dissipation (TA = 125¡C).............................................................200mW
Storage Temperature Range ....................................................Ð55¡C to +165¡C
Junction Temperature...............................................................Ð40¡C to +150¡C
Electrostatic Discharge (except TANK pin) ................................................2kV
Lead Temperature Soldering
Wave Solder(through hole styles only) ...........10 sec. max, 260¡C peak
Reflow (SMD styles only) ...........60 sec. max above 183¡C, 230¡C peak

Rangkaian Pendeteksi Angin

This circuit uses an incandescent lamp to detect airflow (mendeteksi angin). With the filament exposed to air, a constant current source is used to slightly heat the filament. As it is heated, the resistance increases. As air flows over the filament it cools down, thus lowering it's resistance. A comparator is used to detect this difference and light an LED. With a few changes, the circuit can be connected to a meter or ADC to provide an estimation on the amount of air flow. 

Rangkaian Pendeteksi Angin

LM339 Pinout

The glass will have to be removed from L1 without breaking the filament. Wrap the glass in masking tape and it in a vise. Slowly crank down until the glass breaks, then remove the bulb and carefully peel back the tape. If the filament has broken, you will need another lamp.

List Component

R1 : 100 Ohm 1/4W Resistor 
R2 : 470 Ohm 1/4W Resistor 
R3 : 10k 1/4W Resistor 
R4 : 100K 1/4W Resistor 
R5 : 1K 1/4W Resistor 
C1 : 47uF Electrolytic Capacitor 
U1 : 78L05 Voltage Regulator 
U2 : LM339 Op Amp 
L1 : #47 Incandescent lamp with glass removed (See "Notes") 
D1 : LED