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If you are in the market for a surround sound system I'm sure you are trying to learn as much as possible about options before you reach the buying stage. One thing to keep in mind is that there are many options and most of them will come down to a matter of taste when all is said and done. There is no right or wrong component or process when it comes to buying a surround sound system only what does and doesn't work for you and the space you have available. You will find throughout the process that there are many parts, pieces, and components that you may purchase for your surround sound system and even more prices for those individual items. Ultimately the decision comes down to how much of a sound snob you are. Seriously. I must admit that my personal preference is for the most possible sound saturation and the most realistic possible sound as possible. For this reason I am more interested in buying the components as individuals rather than a simple AV receiver. This does no...

In this circuit, an HA-4900 series comparator is used in conjunction with a D/A converter to form a simple, versatile, multichannel analog input for a data acquisition system. The processor first sends an address to the D/A, then the processor reads the digital word generated by the comparator outputs, lb perform a simple comparison, the processor sets the D/A to a given reference level, then examines one or more comparator outputs to determine if the inputs are above or below the reference. A window comparison consists of two such cycles with two reference levels set by the D/A. One way to digitize the inputs would be for the processor to increment the D/A in steps. The D/A address, as each comparator switches, is the digitized level of the input. While stairstepping, the D/A is slower than successive approximation; all channels are digitized during one staircase ramp.

Gambar Skema Rangkain Audio Amplifier 10 Watt This schematic is a 10 watt amplifier for audio frequencies (approx. 50Hz-20kHz). The circuit is extremely simple, comprised of a total of only 18 components, 4 of which are transistors. Of the transistors used, 1 is a PNP (2N3906) , and 3 are NPN (2n697, 2 x NJ480). Source : www.electrokits.com

It can be handy to have your phone and Internet router continue working for a while after  a power failure for example, if they provide  access to a security system. This requires a  backup power supply for the router. The version described here consists of a 12-V lead-acid battery and a voltage converter capable  of supplying an output voltage in the range of  15 to 30 V. It has built-in protection to prevent  excessive battery discharge.  This DIY uninterruptible power supply (UPS)  operates in standby mode as long as the  mains voltage is present. Circuit diagram : Router UPS Circuit Diagram The UPS consists of four parts: a backup  detector circuit that monitors the supply  voltage from the AC mains adapter, a battery  circuit that monitors the battery voltage to  prevent it from dropping below 11.8 V, a FET  switch between the battery and the voltage  converter, and a voltage doubler (inside the  dashed outline). To understand how it works, first consider  the situation with ...

Maybe you do not believe , because so long radios sold in the form usiong DC power as the driving component work. But I took to fiddling with radio without making a circuit of electrical current/voltage source which is rather strange. Radio Works well if no one put the components in accordance with its placement or its symbol. Therefore , we must consider the placement and and examined before starting step in assembling this very simple circuit. Description : R1=2K2 C1=Varco (variable capacitors ) 0-250 pF C2=100pF D1=Crystal Diode OA72 A = Receiver Antenna 10-20 meters along L1=Spool of wire antenna using nikelin / copper 0.25mm and 12.5mm koker and as 30 rolls wrapped arround to ferit. The circuit above is only useful as a radio receiver only. Can be called a crystal radio. The diode will process the sound waves through the antenna, then stored to capacitors.

Tube Power Amplifier 35W Push Pull is made using a tube and eventually compiled configuration push-pull amplifier. Tube Power Amplifier 35W Push Pull tube til it using EL-34 as the amplifier end. In the power amplifier that is made with a tube at a glance looks simple because the use of active components that are not complex. It should be noted that the use of tubes in Tube Power Amplifier 35W Push Pull require a high voltage supply, therefore in the process of making and finishing must be careful of high voltage and radiation. Detailed series of Tube Power Amplifier 35W Push Pull can be seen in the following figure. Tube Power Amplifier Series 35W Push Pull Sign Components Tube Power Amplifier 35W Push Pull R1 = 470K 0.5 W R2-5 = 2K2 0.5W R3 = 150K 0.5W R4 = 220K 0.5W R6-10 = 56K 0.5W R7 = 3.9K 0.5W R8 = 220R 0.5W R9 = 1M 0.5W R11 = 39K 1W R12-23 = 180K 0.5W R13-21 = 820K 0.5W R14-22 = 5K6 0.5W R15-20 = 680K 0.5W R16-19 = 100K 0.5W R17-18 = 3K3 1W R24 = 470R 2W TR1-2 = 470R 1W Variabl...