TREE

This circuit is one of several series of power amplifiers that have output / low output power. This amplifier output is only possess more or less 4Watt. Or 2 X 2Watt stereo power amplifier. Minimum required voltage is not less than 3 volts and a maximum voltage of no more than 14 volts, and voltage must be rectified and filtered to obtain the maximum of the processed audio. Component List : R1 = 2,7R R2 = 2,7R C1 = 1uF C2 = 1uF C3 = 100uF C4 = 220uF C5 = 100uF C6 = 100uF C7 = 220uF C8 = 0.1uF C9 = 0.1uF C10 = 470uF C11 = 470uF U1 = ULN3750B

Now we’ll prepare the glass fiber. We are going to cut it a bit bigger than our design, leaving a small margin. We cut the page design, where the “Top” parts were in normal vision. We attach the page to the glass fiber with a little bit of sellotape. We choose two pads which are situated at both extremes of the design, one that is at the upper part and the other one at the other extreme end, but in the lower part. We make a hole with a hand drill in the mentioned pads. The hole should be 0.8 mm wide. We have to look carefully at the pads we have chosen, since now we have to make a small hole with a pin in the photograph paper, on the page which coincides with “Top” mirrored part and with the “Bottom” part. We now leave a photograph paper with design and we take a kitchen towel and a solvent. We remove the page which was attached to the glass fiber and we rub the copper with the kitchen towel dipped into the solvent, so that it becomes shiny on both sides. Once we have don...

Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current. In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made ​​her basiccally regulator IC LM723 is a fairly legendary.

Generally for connecting an LCD display to an Arduino using 7 strands, it usually breaks the leg that has any projects that remain few ports to be used. But there is a way, using an IC 74LS164 (8-bit serial shift register), a resistor and a diode, but it's not just hardware, you have to use a library. This Arduino library for connection of 2-wire or 3-wire using HD44780 compatible LCD display via shiftregisters. This circuit is considered "deprecated", but it's worth testing. LCD Display on the Arduino Circuit 

Warning: Take care with transmitter circuits. It is illegal in most countries to operate radio transmitters without a license. Although only low power this circuit may be tuned to operate over the range 87-108MHz with a range of 20 or 30 metres. Circuit diagram Notes : I have used a pair of BC548 transistors in this circuit. Although not strictly RF transistors, they still give good results. I have used an ECM Mic insert from Maplin Electronics, order code FS43W. It is a two terminal ECM, but ordinary dynamic mic inserts can also be used, simply omit the front 10k resistor. The coil L1 was again from Maplin, part no. UF68Y and consists of 7 turns on a quarter inch plastic former with a tuning slug. The tuning slug is adjusted to tune the transmitter. Actual range on my prototype tuned from 70MHz to around 120MHz. The aerial is a few inches of wire. Lengths of wire greater than 2 feet may damp oscillations and not allow the circuit to work. Although RF circuits are best constructed on...

2×160 W at 10% THD+N Into 8-Ω BTL  2×210 W at 10% THD+N Into 6-Ω BTL  1×300 W at 10% THD+N Into 4-Ω PBTL 2 x 210 Watt STEREO DIGITAL AMPLIFIER POWER STAGE

This is Stereo Amplifier On this schematic amplifier circuit  use the ic AN7145L , but can use the following IC : AN7145M AN7145H AN7146M AN7146H You can use of all ic above. anthis circuit need suply voltage with dual voltage . Minimum voltage 6 Volt and maximum voltage 20 volt . Voltage just (-) and (+), but (-) can also ground. Maximum power output 2 X 20 watt with minimum impedance 4 ohm. Click image to view enlarge. You can operate this circuit with  plugging input to , PC or other media can give signal audio.

This power amplifier can use IC TDA1510 or TDA1515, minimum voltage require 6 volt and maximum voltage require 18 Volt, Voltage with DC supply voltage.Power output  2x 30 Watt stereo amplifier , with 2 ohms impedance , its is low impedance . You can use the fullrange or woofer speakers. see schematic below :

This circuit operate with IC AN7156N . You just can use this IC , because hav'nt similarity it. In this Circuit have 2 input IN R and IN L and have Output R and L . Voltage supply require 15 V , minimum voltage 9 V and maximum voltage 24V . And the voltage must DC voltage , and better the DC voltage filtering . Maximum Output for 1 speaker 25 W , so this circuit have maximum output 2 X 25 W with minimum impedance 4 ohm. See this circuit schematic below : Click image to view enlarge

Normally, when we talk about an Android-powered system, we would venture into the realm of smartphones and tablets, and very rarely (if ever) into the world of digital cameras. The line is about to be blurred this day, as the Nikon Coolpix S800c was just announced to come with a copy of the Android operating system – Android 2.3 Gingerbread, to be exact. Yes sir, how does this digital camera shape up in the face of a mobile operating system running in the background? Well, we shall have to take a closer look at its machinations and inner workings right after the jump, shall we not ? For starters, with Android running on the Nikon Coolpix S800c, you might actually feel that you are using a smartphone at times – until you realize that you are unable to make any phone calls or receive text messages. Good thing it has Wi-Fi connectivity built in though, as it would not be much of an Android device if there were not Internet connectivity to make it interactive. Setting up the camera for Int...

  Asus will produce the nex Nexus 10 2 (2013 edition) according to new rumours The new Nexus 10 (2013 edition) will be made by Asus, a new screenshot has revealed. The pictures, revealed on Geek.com and presumably from a retailer's stock listing shows the Nexus 10 16GB with the brand listed as Asus, rather than Samsung that manufactured the original Nexus 10. Asus was responsible for making the first and second-generation Nexus 7 tablets and it seems Google was so impressed, it chose the Taiwanese company to make the bigger tablet too.  However, GSMArena says the source is pretty questionable because placeholder numbers are listed in the product's dimensions. Very few specs of the Nexus 10 have leaked thus far, although it's thought the next-generation Nexus 10 will feature a higher-resolution display and will launch on Android 4.3, just like the Nexus 7 2 (2013). There will also probably be a better, higher-powered processor - possibly the same...

This amplifier circuit or with it based on ic KA2210 main amplifier, audio amplifier circuit should disupplay minimum of 10 Volt and up to 16 volts. Power output is 2 x 5.5 W stereo amplifier att. By using this amplifier you can listen to the strains of songs from mp3 player, iPod, etc. This is schematic diagram Part List R1 = 4.7R R2 = 4.7R C1 = 1uF C2 = 100uF C3 = 47uF C4 = 100uF C5 = 0.1uF C6 = 1000uF C7 = 1uF C8 = 100uF C9 = 47uF C10 = 100uF C11 = 0.1uF C12 = 1000uF IC = KA2210