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This 5.1 surround amplifier circuit schematic use the IC AN7168 as the main component from this circuit . Minimum voltage required 12V and maximum voltage 24V , I recomended it 12 V because the voltage support on are components. But if you want to better a loud sound you can raise it.  Maximum power output 40W with impedance 4 ohm . This 5.1 surround amplifier circuit schematic also support to make surround sound or 5.1 speaker. Use this amplifier on rear speaker , left right , and center but dont use to subwoofer speaker. See 5.1 surround amplifier circuit schematic below : Click to view large If you want to make a 5.1 surround sound you must make 5 the circuit of 5.1 surround amplifier circuit schematic , for left and right speaker , rear left and right speaker , and center speaker. Use the subwoofer speaker with support amlplifier subwoofer circuit .

To day i share a little power for my friends.This is a Simple 1 Watt PLL FM Broadcast Transmitter . The RF output varies from 500mW to about 1.2W depending on the frequency selected and RF output transistor used. Motorola 2N4427 always seems to work well. Transmitter uses CMOS PLL VCO that prevents the frequency drifts. The frequency is selected via DIP switches. The transmitter is supplied by 12V DC and can also be powered from the battery.   Simple 1 Watt PLL FM Broadcast Transmitter

                                    This is variable DC power supply circuit, or we can call it adjustable DC power supply which give us a 1.2V-25V output voltage. The power supply schematic above is taken from the datasheet of regulator LM338K manufactured National Semiconductor. The circuit uses IC LM338K as the voltage regulator, so we will get the stable and regulated output. The regulator IC LM338K provides 5A output current max, and the voltage from 1.2 to 32V, it also featured the integrated thermal and short-circuit protection. Maximum voltage at input and output of the regulator is 35V . The transformer current value depends your needs. For example, if you need 120W power output then you’ll need 5A transformer. 5A x 24V (full power) will give you 120W output power. Since this power supply circuit described to give us 1.2-25V DC output, then you must have transformer with 24V AC output. Fo...

 "Simple 2.1 Surround Speaker System " . Here I have used  three TDA 2030 IC for making signal amplification . Here you need a sub filter extra ( Sub filter circuit diagram link showing below ) . This project  mostly used in computer  . Part list and applications are showing below. Part List Component No: Value Usage All C1 100MF  Grounding  All C2 100nF Grounding All C3 100nF Grounding All C4 100MF Grounding All C5 100MF Feedback All C6 100MF Audio Coupling  All C7 220nF Noise Grounding  All R1 1K All R2 10K ( Not 1K ) All R3 22K All R4 22K (Not 1K ) All RV1 100K Volume Controlling  All D1 To D2 IN4007 Potential Breaking U1 To U6 TDA2030 Amplification Applications * 2.1 Surround Amplifier * 2.1 Home Theater

This is a one watt home stereo amplifier module project using the KA2209 IC from Samsung, which is equivalent to the TDA2822. It operates from 3-12V DC & will work from a battery since the dormant current drain is low. It requires no heat sink for normal use. The input & output are both ground referenced. Maximum output will be obtained with a 12V power supply & 8 ohm speaker, however it is suitable for driving headphones from a supply as low as 3V. The Specifications of the home stereo amplifier : D.C. input : 3 – 12 V at 200 – 500 mA max Idle current : approx. 10 mA Power output : > 1 Watt max. 4-8 ohms, 12V DC Freq. Resp. : approx. 40 Hz to 200 kHz, 8 ohm, G=10 THD : < 1 % @ 750 mW, 4-8 ohm, 12V Gain : approx. x10 (20 dB) OR x100 (40dB) S/N ratio : > 80 dB, G = 20 dB Sensitivity : < 300 mV, G = 20 dB Input Impedance : approx. 10 k ohm Description   The gain is adjustable from ten to 100, i.e. twenty to 40 dB. Start with feedback resistors R1 and R3 of 1k...

Today we are all going to learn chip DS18B20 temperature. I Characteristics: The specification of the sensor DS18B20 can mention briefly as follows: • Use a wireless interface should just have one leg out to the media. • It is possible to measure the temperature in the range of -55 -> +125 oC.Voi temperature range -10 ° C to + 85 ° C, the accuracy of ± 0.5 ° C.Co temperature warning function sweeping away the value given. • Voltage: 3 - 5.5 V, you can configure multiple encryption level from 9-12 bits The greater the number of bits precision hon.Thoi conversion time is 750ms maximum temperature for 12 bit encryption • Current consumption in sleep mode tiny. • Each sensor has a unique identification code stored in memory 64-bit on-chip ROM (on chip), binary values ​​are laser engraved. • If configured for DS18B20 under 9,10,11,12 bit precision, we have respectively: 0.5 ° C, 12:25 ° C, 0125 ° C, 0.0625 ° C.Theo default manufacturer if they It is not configured mode, it will automatic...

5.1 channel amplifier consists of 6 amplifiers 1 channel mono, which has certain specifications on each canals. Has 6 channel surround sound amplifier that consists of Front Left ,Center,Front Right ,Rear Left (Left Surround),Rear Right (Right Surround) , and LFE ( Subwoofer ).For clarity I give a simple illustration of the layout and the circuit for these speakers . 5.1 Speaker Setup Accoustic Field Generator Acoustic Field Generator is generating acoustic sound with surround effects are adjustable with a standard Dolby Surround, able to produce surround sound is good enough but not too much need of funds. Technological developments as if not only focused on one area alone but on all fronts. The development of technologies that exist today one of them is in the field of audio. With more advanced audio technology today not only as mere entertainment but has become a hobby, hobby is not cheap of course. Many audio enthusiasts trying to make music sound that sounded to be ...

10Mhz to 1 MHz Frequency Converter Circuit Part ListIC1 7404 = 1 IC2 7490A = 1 R 1 K = 2 R 3.3 K = 1 C Trim Polymer 39 pF = 1 C Electrophoresis 4.7 uF 16V = 1 C Milar 47 nF 16 V = 1 C Milar 10 nF 16 V = 1 C Ceramic 68 pF 50 V = 1 

To day i share a little power for my friends.This is a Simple 1 Watt PLL FM Broadcast Transmitter. The RF output varies from 500mW to about 1.2W depending on the frequency selected and RF output transistor used. Motorola 2N4427 always seems to work well. Transmitter uses CMOS PLL VCO that prevents the frequency drifts. The frequency is selected via DIP switches. The transmitter is supplied by 12V DC and can also be powered from the battery.   Simple 1 Watt PLL FM Broadcast Transmitter

This is the 1.5V to 5V/12V DC/DC Converter with LT1073 Project. Small 1.5V to 5V or 12V DC/DC converter with LT1073 chip. The IC is available in three different versions, depending on output voltage. Two with fixed output voltage of 5V and 12V, and the most interesting that can be adjusted. The adjustment is done through a voltage divider with two resistors, of mass, output and Terminal 8, internally connected to the voltage comparator IC, which is responsible for stabilizing the output voltage. LT1073 has an internal everything you need to make a small DC / DC converter with a low operating voltage of only 95μA 1V and consumption without load. If you do not have a meter inductance, the inductive part of the drive is a bit more complicated to make, but we shall see some possible solutions. Capacitor also recommended by the manufacturer for the circuit is a bit hard to get, I have used a tantalum recovered from another power source, and the ripple voltage at the output is quite low....

A fellow 'brother in arms' has asked me to modify his 2-knob version of the Janglebox for a volume control recently, so I thought I'd post this.

Power treatment: 50 watts RMS/75 watts sail through * Voice coil diameter: 1-3/8" * Le: 2.34 mH * Impedance: 8 ohms * DC resistance: 6.7 ohms * Frequency response: 30-4,000 Hz * enticement importance: 15 oz. * Fs: 34 Hz * SPL: 88 dB 1W/1m * Vas: .87 cu. ft. Classic Woofer - Dayton Audio DC160-8 6-1/2

 Sony Computer Entertainment Inc . (SCEI) announced that cumulative sell through for the PlayStation 4 ( PS4 ) worldwide has surpassed 2.1 million units as of December 1, 2013. The number includes the 700,000 units sold through in Europe and Australasia launching on November 29. The PS4 system became available on November 15 in the United States and Canada and on November 29 in Europe, Australasia and Latin America and is now available in 32 countries globally. “ PS4 delivered the best launch in PlayStation history with the North American release and we’ve continued this incredibly successful start in Europe, Australasia and Latin America,” said Andrew House, President and Group CEO, Sony Computer Entertainment Inc. “Demand remains incredibly strong and continues to overwhelm the supply worldwide, but we are diligently working to meet those growing demands and to deliver additional PS4 units to our retail partners throughout the holiday season.  We are extremely grateful f...

Specifications Dimensions Inches . . . . . . . . . . . . . . . . 11½ x 11½ x 11½" Metric . . . . . . . . . . . . . . . . 29.2 x 29.2 x 29.2cm plus 1¼" (32mm) for feet. Driver . . . . . . . . . . . . . . . . 8" Woofer Nominal Impedance . . . . . . . . . . . . 4  Enclosure Design. . . . . . . . . . . . . Tuned Port Amplifier Power . . . . . . . . . . . . . 50 watts RMS Frequency Response . . . . . . . . . . . 45Hz - 150Hz (± 3dB) Crossover Frequency . . . . . . . . . . . 50 to 150 Hz Continuously Variable 1. Auto Power - This Auto On/Off switch controls whether the BU1’s Automatic turn-on circuit is active. When the switch is ON , the BU1 will turn itself on, indicated by a green LED, when it is plugged in and receiving a signal. When the BU1 has not received a signal for approximately ten minutes, the unit will revert to the STANDBY mode, indicated by a red LED. When this switch is OFF, the unit will revert to the STANDBY mode and will stay OFF, regardless of input signa...

A simple scheme to generate the inverter voltage from 1.5V to 3V can be made ​​on the basis of slightly modified the well-known multivibrator. Under these denominations in the scheme of the frequency converter is approximately 130 kHz. Inductance value can be calculated or chosen experimentally. But you can simply adjust the frequency of the converter to produce maximum output voltage. Schottky diode VD1 can be replaced by any other similar characteristics. 1.5V to 3V Voltage Converter Circuit Diagram   For further stabilization of the output voltage can be applied to the zener voltage of 3V – 3.3V. This scheme can be used to power a LED or low power devices based on the microcontroller, for example, MSP430. Parts list : R1,R3 : 1K R2 : 2K2 C1 : 470pF C2 : 100uF/3,3V C3 : 1000uF L1 : 470uH VD1 : 15MQ040 VT1, VT2 : BC547

How to Build 1.2-30V/1.5A Variable Regulated Power supply, This is simple 1.2-30V/1.5A variable regulated power supply circuit diagram The 110V-AC coming from the powercord is fed to the transformer TR1 via the on-off switch and the 500mA fuse. The 30vac output (approximately) from the transformer is presented to the BR1, the bridge-rectifier, and here rectified from AC (Alternating Current) to DC (Direct Current). If you don't want to spend the money for a Bridge Rectifier, you can easily use four general purpose 1N4004 diodes. The pulsating DC output is filtered via the 2200µF capacitor (to make it more manageable for the regulator) and fed to 'IN'-put of the adjustable LM317 regulator (IC1). The output of this regulator is your adjustable voltage of 1.2 to 30volts varied via the 'Adj' pin and the 5K potmeter P1. The large value of C1 makes for a good, low ripple output voltage.  1.2-30V/1.5A Variable Regulated Power supply Circuit Diagram Why exactly 1.2V and not...

Free circuit dot com presents the timer circuit with IC 4060 as this circuit is simple to make the project or devices. This timer circuit can  set time at 1 minute to 2 hours. Frist information, Technically, the IC 4060 is a 14-stage ripple carry binary counter, the oscillator and divider of a monolithic integrated circuit, contained in a 16-pin dual-in-line housing with ceramic or plastic. A phase of the integrated oscillator is a key feature of the integrated circuit, which keeps the number of components in the integrated circuit to a minimum at the design frequency generators or oscillators. The phase of the internal oscillator operation easily through a network of resistors and a capacitor connected to the pins #8, #9 and #10. 1 Minute to 2 Hour Timer Circuit Diagram The timer time is determined by P1 and C1, through the following formula (seconds): t = 2.3 * (P1 + 18k) * C1 * 2 ^ 13 . The basic structure of the IC can be understood from the following: According to the rule...

Circuit Diagram Description Antennas are much shorter than quarter wavelength impedance obtained is very small and highly dependent on the frequency. It was a difficult game impedances over a decade of frequency coverage. Instead, the phase of the input source-follower FET Q1. A high impedance input successfully bridges Antenna characteristics at any frequency.   transistor Q2 is used as a follower, to provide a high impedance load for Q1, but more importantly that it makes to drive low-impedance amplifier coupled to commonly Q3, which each receive a voltage amplifier. Q3 Q4 turns transistor output impedance is relatively low in impedance, which is enough to drive 50 Three dimensional receiver, Antenna input impedance. Source -http://www.free-circuit.com/2010/09/21/14-wavelength-active-antenna-circuit/

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 basiskan regulator IC LM723 is a pretty legendary. Description: R2 to set the output voltage. The maximum current is determined by R3, over-current protection circuit inside the LM723 to detect the voltage on R3, if it reaches 0.65 V, the voltage output will be off her. So the current through R3 can not exceed 0.65 / R3 although output short-circuit in his. C3 and C4 are ceramic capacitors, as much as possible directly soldered to the PCB, this is because the LM723 is prone to oscillation that is not cool. LM723 works with 9.5V input voltage to 40 V DC and the LM723 can generate its own current of 150mA when the output voltage is not more than 6-7V under input voltage. Specifications: Output...