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Fan controller by temperature sensor using LM393

August 27, 2012, 6:43 am
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A guest who visit my site would like to create a project about the control on/off the fans with based on temperature automatically or Simple fan on off controller by temperature sensor. I would like to introduce the concept of this circuit. You probably know that, Useful fan when the weather is hot. But cold weather, fans are not very useful. If we turn the fan on sleep then at night is cold. We get fan the whole night still feel unwell certainly .
If you use a timer, may not be exact. Sometimes the time been exhausted. But the weather is hot. Need to turn the fan again, Cumbersome and not really the point. Lets we use the temperatures to control a fan better.

fan controller by temperature sensor using LM393

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Cheap function generator using XR-2206

August 27, 2012, 9:24 pm
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Formerly, you will find the signal generator is called “The Function Generator” for use one machine. Also would have to pay not less, called the is a very big deal. It is interested or not?
But now you can make it yourself easily, with a little investment. Try do like the features of this project. The heart in working of this circuit is the IC XR-2206. Which has structure consists of four main parts of the circuit are.
1. Voltage control oscillator (VCO) that has the frequency out to, depending on the value of the capacitor between pin 5-6 and the resistor between the pin 7-8.
The output is a 2-way. The first is the sync signal. or square wave output Section alternatively signal is supplied to the management waveform circuit.[...]

. 10,000-1,000,000 Hz

the-cheap-function-generator-circuit-using-xr2206

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Dual Variable Regulator power supply 5-25V by LM7805,LM7905

August 29, 2012, 3:41 am
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The top cheap dual variable regulated power supply. It can adjust the dc voltage with +5V to +25V and -5V to -25V at current 1 amp, suited for testing the linear ICs only by op-amp and very easy.

The DC power supply that has the positive voltage output and negative all in one form, and also can fine output voltage that need much in experiments the Linear ICs, especially op-amp.
Therefore, this power supplies so it is necessary on the experiments table all of those electronic player. Or will be used in the laboratory by various educational institutions. The need is not so bad. Saving money does not need to buy the foreign trade balance.
Building is easy, because the IC regulator 3-pin, Popular Numbers 7805 and 7905 controlled positive
Dual Variable Regulator power supply 5-25V by LM7805,LM7905
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9V Low Power Switching Regulator

August 30, 2012, 9:19 pm
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This is the Power Switching Regulator 9V Circuit that is low current power output and It has strong point is the voltage input change from 2.4V to 10V but a constant voltage output 9 Volt. We used the RC4193 Micropower Switching Regulator is the base, easy to use and there are a few parts in circuit. The test battery point for check voltage of batter or input.
The low power switching regulator IC, number: RC4193, that that Contained in a small body of caterpillar 8-pin. It is designed for devices that work with batteries. The DC regulator power supply is built by the 11 normal parts. By has the 5 resistors, 2 capacitors, a diode, a choke coil and IC no.RC4193 and that importance the battery 2.4 volt to 9 volt : 1 set.
How it works
-This power supply has stable output voltage at 9V until battery is worn down to less than 2.4V The circuits is actual as shown below.
-The RC4193 has a reference circuit inside, is controlled by the Ic current and is define from the resistor R1 that connected externally to IC1
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Balance temperature switch

September 1, 2012, 1:22 am
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Usually we have seen in this type of equipment, consisting of thermistor or temperature sensor in variations. Around this time, found sensor which will that is new it that new, will be old it is old, Actually, because is known, and then some, I will explain it to someone who knows only

Temperature sensor with a semiconductor devices.

-It is actually, all the semiconductor resistance within. Which decreased when heated, will be very or least it is up to the agents used in the doping process. This includes a semiconductor, resistor, integrated circuit, transistor, etc..

-A diode is a semiconductor device at inexpensive, as compared to other devices, then select is temperature sensor in this circuit.

 

Dfferential Temperature Relay Switch by IC 741 

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DC voltage adjustable power supply 0-50V up to 2A by ua723-2N3055

October 12, 2012, 12:14 pm
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The Circuit power supply regulator 0-50V 2A by IC LM723 + Transistor 2N3055 & BD140 & A671 is nice Pwer supply,
For all electronic user. You can Current control by VR 5K, LED5 For display OVERLOAD.
To use transformer 3A, Transistor to Hold Heatsink. To adjust the output voltage< VR1 – 5K (VOLT CONTROL)
OUTPUT : 0V to 50V , 2A
Today I would like to introduce you to DC Voltage adjustable regulator voltage between 0V to 50V and current up to 2A. Which are suitable for various electronic circuit, when viewing circuits in the figure, many people will think that, in this circuits outdated, but I think, it is also highly effective are.
The VR2-5K be adjusted voltage output between 0 to 50Volt.
-The VR1- 5K be fined current output load 0 to 2 Amp.
- When the short-circuit current limit or severe, it is a good system.
- Low noise, due to the use IC uA723 dc voltage regulator IC which is high quality, widely used for many years.
DC voltage adjustable power supply 0-50V up to 2A by ua723-2N3055

Read more at source: http://www.eleccircuit.com/power-supply-regulator-0-50v-2a-by-ic-lm723-transistor-2n3055-bd140-a671/

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The 60hz calibration frequency standards for digital clock by MM5369

October 12, 2012, 12:21 pm
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This is digital circuit, Pulse Generator 60HZ and TP 3.579MHZ. It use IC MM5369 – 8Pin easy use. power supply 12V.Out put Frequency 60HZ Pulse Generator. (PIN 1)
This is calibration frequency standards for digital clock circuit.
When you have finished building your digital clock circuit kits, with any ICs number. But how to
which normally we will be get the standard frequency signal of AC power line 60Hz (North America the power line frequency is 60 cycles per second or 60 Hertz) that is a sine wave and then is converted with the Pulse Generator circuit become to square wave form of 60 Hz .
But when we need to use it in the car or others DC power supply. How to it still work well?
We so built the circuit of the pulse generator of 60Hz, to replace the old ways. You may also be adapted to backup set , when the power goes out. We do not have to waste time re-scheduling.[...]
60HZ CLOCK Pulse Generator by IC MM5369
Read more source: http://www.eleccircuit.com/60hz-clock-pulse-generator/

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Small DC to DC converter 1.5V or 3V to 9V by TL496

October 15, 2012, 5:04 pm
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When you have sized batteries is 1.5V or 3V, but need a voltage 9VDC, DC converter circuit to help you for sure!

Some problems in the electronics job, can modify or bring devices come to apply available not difficult If we know the principles and limitations of those devices. As the project is being offered at this time, will be bringing sized batteries 1.5 volt connected through an electronic circuit called dc converter to increase the voltage to have higher value be 9 volt instead of the battery 6 pack, connected series.

It can also increase the voltage from the battery 3 volt to 9 volt as well be the original circuit, and it will allow more current.

Properties of the IC TL496
- A TL496 be control circuit of the power supply, by the circuit was designed, so that the output voltage is 9 volt. For the change of the input voltage, which comes from the battery 1 or 2 pack. The TL496 operates in a switching regulator, the power loss is less than the typical linear regulator.

Micro DC Converter 3V to 9V using TL496

Read more source: http://www.eleccircuit.com/micro-dc-converter-3v-to-9v-using-tl496/

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DC adjustable power supply high efficiency 0-50V 1A by CA3130-CA3086

October 15, 2012, 5:10 pm
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Today I would recommend a DC power supply that can adjust voltage and current, another one circuit. It’s very interesting since is highly effective, devices not very. This circuit has special feature that can supply output voltage widely range is during 0.1V to 50V
With value of the load regulation changes not more than 0.005% between 0A to 1A.
-The stability of regulation, when change the input voltage, the criterion is 0.01%.
-The noise output signal under 250uV
-This circuit can provide an output voltage in a wide range by the number of IC-CA3130 by the input range is 0V.
-During the extension of the output voltage can not, by adding Q4 between this IC and transistor both series. This circuit has a high threshold makes the regulation is accurately high level. Darlington transistors T1/T2 and make a high enough flow. Q3 is the limited current output. When the VR1 fully anticlockwise, Q3 current limit around 0.6A. This current limit, it will not work When the VR2 rotate clockwise until it stops.

Circuit Power Supply Regulator 0.1-50V 1A by IC CA3130 , CA3086 , 2N3055
Read more source : http://www.eleccircuit.com/circuit-power-supply-regulator-01-50v-1a-by-ic-ca3130-ca3086-2n3055/

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High power DC regulator 4-20 volts 20 amps by LM338

October 22, 2012, 12:15 am
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I find this circuit, for an electronic friend, according demands of those who want the the power supply, good quality, excellent performance. Can supply the voltage from 4-20 volt and currents up to 20 amperes. or 400 watt
For use in electronic telecommunication. Transmission – radio …. more diverse, if you want Quality is important.
This project is a few piece of equipment, because main equipment used is IC-LM338K, so this power supplies, it is incredibly cheap.
Try to build then you will like it!
Figure 1 circuit, in normal conditions, voltage between pin Adj and pin output is equal to 1.25V stable that flow pass R1, R2 will have constant as well.
The output voltage be equal to voltage at pin Adj + 1.25 volt or Calculated as follows
Vo = 1.25 (R1 + R2) / R1
In normal IC-LM338 Can supply up to 5 amps, but to load current maximum 20 amps, we will bring it to parallel.
What to watch out, when we connect many IC with parallel form, is the average current flowing through the circuit. Each equally.[...]

. high-power-dc-regulator-4-20-volts-20-amps-by-lm338

Click to read more : www.eleccircuit.com/high-power-supply-regulater-0-30v-20a-by-lm338/

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6V backup battery power supply regulator with IC 7805

October 25, 2012, 9:42 pm
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This simple and cheap 6 volt power supply circuit with 6V backup battery system.
The AC power 220V is entered to through input of transformer-T1 to reduce voltage as 9VAC, then wire connected to four diode D1-D4 as bridge rectifier became to 11VDC, then the current is filtered to dc voltage that low ripple output and then the voltage is regulated to 6VDC constant voltage by IC-KA7805( IC-7805 type) In normal it is used for 5 volt only but now we add two resistor to determined output voltage is 6 volt and passed through diode 1N4002-D6 to output is 6 volt.

6V backup battery power supply regulator with IC 7805

Read more source: http://www.eleccircuit.com/6v-backup-battery-power-supply-regulator-with-ic-7805/

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EasyDriver Stepper Motor Driver

October 27, 2012, 12:59 am
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Cick to read informationEasyDriver Stepper Motor Driver

The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). EasyDriver requires a 7V to 30V supply to power the motor and can power any voltage of stepper motor. The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V. Connect a 4-wire stepper motor and a microcontroller and you’ve got precision motor control! EasyDriver drives bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors. On this version (v4.4) we fixed the silk error on the min/max adjustment.[...]

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Audio generator is controlled by light

October 28, 2012, 8:27 pm
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These circuits is used to control audio with light. In simple transduction And the change of light. To control the tone.,we is recommended that three circuits, each circuits consists of a simple device. Suitable for studying the performance of optical sensors is LDR.
Tone Generator Control with light using IC 555

This the Tone Generator circuit that interesting because of can control the sound has with the light. By use the integrated circuit NE555 be pillar equipment , which perform produce sound frequency in model Astable Multi vibrator or pulse generator. And use 25 ohm small-sized loudspeakers. For the equipment detects the light. I uses LDR because of be usable good easy and economize with. For tone sound use can fine C1 get. by many values , make the low voice but when the value is a little make tall sound goes up. The detail is other see in the circuit better.
Read more source: CLICK HERE

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Cheap emergency lights using D313

October 28, 2012, 8:55 pm
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If you ever feel annoyed when the power failure while a working or a business. and in important area. Such as: the way up the ladder and in the bathroom could be dangerous, or shops at night you might be case it gets stolen the products. Emergency lighting is necessary to replace the main light during power failure.
Internal emergency lights will have battery backup. As usual This circuit will charge to stored in batteries. But when the electricity failure, it does the opposite is the battery will discharge into a lamp to provide light immediately.

Before read “The working principle of this circuit”. Let’s consider circuits simple first.

Mini Emergency Light by 9013 transistor

When you are born electricity problem switches off, should seek the system Emergency give the light. I begs for to advise Mini Emergency Light. By use electronics part, general seek easy and have no transformer. Then make this circuit has small-sized and economize very. From this circuit use power supply 3V then apply to lamp 2.4V 5W only. And friends can use Nicad Battery or , NiMH battery the size is 1.2V x 2 give the light has just enough. When the electricity switches off the system command give lamp stick bright get. The SW1 use for turn on or turn off this circuit. A friend may use this circuit help offer the convenience your please sir.

Mini Emergency Light by 9013 transistor

However, this circuit is not suitable for practical applications. Because of the small size and short duration.
We then develop is this below circuit.

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Animated Ghost Kit

October 28, 2012, 9:06 pm
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Animated Ghost Kit

Moves, Shakes, Blinks! Who says there aren’t such things as ghosts? Once your friends come upon this one they’ll think differently! The unique circuit board design includes two ominous blinking eyes that change with various conditions, including sudden changes in ambient noise. A highly sensitive built-in microphone picks up anything from noises to talking and makes the ghost dance with its built-in motor, make eerie sounds with the built-in speaker, and randomly blink. A white cloth and a hanger are included as shown to make it look like the real thing. Runs on on 2 AAA batteries.

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Blown Fuse indicator LED Display

October 31, 2012, 10:55 pm
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A Fuse be the equipment protects that use often most. Because of cheapness can use protect electronics expensive circuit. Generally when fuse torn us can know immediately. but in sometimes Fuse torn already we don’t know. such as in electricity automobile system brake system , the system delays the electric current very much, etc. Fuse torn get into trouble at we must know for immediately the safety. I then beg for to advise the circuit is simple. It is can show with , LED that now. Fuse torn already please. See the illustration by equipment value that show that note for Voltage Source 12V

Blown Fuse indicator LED Display
SEE more circuits about fuse alarm Click HERE

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Easy AC wattmeter circuits

November 19, 2012, 10:46 pm
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If you are looking for AC power measurement. To use it just a little, which is not worth it. When we need to buy an expensive tool. Because use little does not need high accuracy. I would like to propose the concept of wattmeter circuit in such a way easy as it was.I collected all three circuit, as follows. Read more : Simple AC wattmeter circuit

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Simple vu meter schematic

November 19, 2012, 11:25 pm
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Expensive stereo is general often have VU meter come to and for help show max power the stereo not too much. For radio tape general plaything has will no VU Meter. I then think to seek Multi meter use can replace. By use Range 100uA and electronics equipment the other again. It have be Potentiometer 10KHZ for fine decorate the rapidity the value deviates full scale. Part diode and Capacitors perform arrange the electric current rectifier from AC to DC Current.[...]
Read more and see circuits at source : http://www.eleccircuit.com/simple-vu-meter-schematic/

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Police bicycle siren circuits

November 21, 2012, 11:13 pm
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My son like to watch movies about the police catch the culprit. However is funny because I do not see in violence model.Some stories the police rided a bicycle to catch the culprit. And turned on very loud siren. (In the minds of children).
When I build a project on electronic sirens. So he request me to build a bicycle police sirens. Which I’m not sure about the sound, However at least his son will like it. By the circuits below.

This circuit is the sound generator super siren, for use be alarm signal get by live frequency generator circuit that use , op-amp circuit. The principle works to are while still no press switch S1 will still have no the loud sound comes out from a loudspeaker SP1. When do pressure switch S1 then liberate C3 do something charge full until while press switch S1 and discharge go out. When liberate switch S1 come in at R7. Which perform in something limit current come in at 3 Non inverting legs of IC1a. By IC1, D1, D2, C1, C2 and R5 build be sound generator signal circuit then export come to way pin 6 of IC1a come to reach at pin 3 (Noninverting) of IC1b. By have R1 and R2 build be Dectector circuit. For do fining level has signal then signal to come out the way pin 7 of IC1b which will have flowing through comes in at pin B of Q1 for do something bias give Q1(BC639) bias. [...]

Read more and see circuits at source :http://www.eleccircuit.com/police-bicycle-siren-circuits/

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Simple sound effects circuits

November 21, 2012, 11:18 pm
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This is Sound effects two tone circuit, which generally abound measure various both of kinds use IC frequency origin oruse the transistor. The sound will that is proportionate big depend on the value of R and C. For this circuit is will building sound of pale long tail or clock ancient sound.
The work of the circuit, when , build the circuit suits power supply have current change R1,VR1 go to charge at C1, enough C1 have volt fall straddle arrive at 0.7V make Q1 begin the work bears fruit to make Q2 work with LED1. [...]

Read more and see circuits at source: http://www.eleccircuit.com/sound-effects-two-tone-circuit/

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