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Archive for August, 2012
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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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
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
Continue Reading »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.
This is the video amplifier circuit or the video splitter circuit, it is designed to take video signal is stronger. Compensate for the loss of signal, and is video splitter video, which can connect up to three outputs. so is suitable for display on several television screens, or video tapes recording at the same time too. (Now may will no video tape.)
The advantage of this circuit is cheap, easy and the results are detailed in the circuit below.
How it works
Technical specifications
- Increasing rate Typically, the circuit video amplifier is designed to have low amplifier rates. (it different with the common pre-amp circuit) For our the circuit has the maximum gain ratio is only 4 times.
- Impedance is 75 ohms on both the input and output.
- Bandwidth of this circuit wide is 5 Mhz.
It can be seen that the circuit contains only three transistors. By Q1 (BC547), Q2 (BC557) acts as a signal amplifier, and Q3 (BD139 or BD137) serves as the output circuit of common emitter follower.
The input impedance of circuit is determined by the value of R1. The input signal entered through C2 to the base of Q1. By the VR1 is the set the level of the signal swing.