If you want a power supply that covers most applications. This circuit may be what you’re looking for. The price you deny difficult. With the following features. 1. On signal mode can supply DC voltage between 0 volt and 60 volt 2. Can provide DC dual variable on positive, negative and ground are +/- 0-30 volts. 3. Can supply current out maximum about 1.5 A. 4. Use the most popular IC are LM317T and LM337T, so do not have to worry about finding the device, and it certainly easy. Before construction, we study the properties of important devices, is regulator IC. Choosing a regulator IC. The regulator IC is used to regulates DC voltage, which in this circuit we use an IC numeber of LM317T for the positive voltage and the LM337 for the negative voltage. Both IC have the same features. Thus, So describes specific number LM317T only. The [...]

The previous day my son said ” A friend has a mini organ. Casio SA-76 44 Key Mini Keyboard, Orange It is Good quality but expensive. My son would have the same. But I said, as we are the Electronic inventor, to try to create their own. We are proud and cheaper too. You might like this mini organ keyboard circuit certainly. Because in addition to the simple, the price is not expensive, effective really worthwhile. You may consider the main features of the circuit, as follows. 1. Can works with DC voltage in rang 3-12 Volt by low current consumption. 2. There are the music playback up to 15 keys, or a note from G3-G5. 3. Can be programmed to play. Repeat for up to 47 notes. 4. Can act as a music source by up to 15 songs.(Simple carbohydrates. Press any key. To select the desired song.) How [...]

A Salt intake in large quantities is not good for the body and also causes of diseases such as kidney disease, high blood pressure, heart disease and paralysis. We should not eat too much. But the recognition of salinity, but may differ. Therefore should be a good barometer. I highly recommend The food salt & salinity tester meter circuit, because it is simple circuit and cheap too. The circuit ideals. We use the comparator circuit by an op-amp IC. Which is the difference between the volume resistance or conductivity of the solution foods has salt is constituent. In with sensing probe immersed or dunk in the water or food. Then Showing amount of salt much, Appropriate salinity, and a little salinity with 3 different LED colors. How the circuit works. The circuit ready running When dipping or dip the probe into the solution or food. Then press switch-S1, by has [...]

A tri-amplifier has three in one a amplification act drive specifically each audio speakers makes the sound quality is very good. Normally amp can drive three speakers at the same time are the woofer, mid-range and tweeter. Which may have limits such as: the impedance of the speakers,the loss of signal in Crossover Network. But it’s very expensive. Thus when compared to the same quality and power. The price of the amplifier and crossover network, combination is more than the price of this the tri-amplifier. When viewing the various elements, then are seen as better in every aspect. Although there are not a lot of power. But it’s only for listening in your home or bedroom very well. The working principles The tri-amplifier will be has the separation a range of frequency of 3 ranges consist of a low frequency ( bass) , the medium frequency(midrange) and the high frequency [...]

Those who are looking for a unique gift of sorts for Christmas and New Year. Certification this project create a predilection certainly for the recipient. This project is designed to meet the needs of create particular project. In order to get the Christmas and New Year. I suggest the project get to the upcoming festival. This project is an LED chaser that is controlled by the voice signal. This principle the led run is not fixed or not of course, is a sparkling running light. The sound from the microphone or input signal. External structure, we used an tree Christmas on the PCB. And the below section is the equipment PCB assembly, use a buildin battery makes, easy move to display it anywhere convenient. When no audio LED will still does not lit. But once the sound through the microphone into, may be music or voice. The circuit will drive [...]