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This amplifier is the monophonic 270 watt Double barreled Amplifier. For the original article, I specified plus and minus 85 V dc power supply voltages. The voltage can be increased to about 93 V to obtain a power rating of 300 W. The amplifier can be built either as a stereophonic or a monoponic unit. My original amps were mono units because the heat sinks, transformer, and filter caps that I used were too large for a stereo amp. The circuit described on this page is a modification of the original Double Barreled Amplifier. The circuit has been simplified somewhat. The circuit board layout is smaller and much more compact. The driver transistors now mount on the circuit board instead of on external heat sinks. And the circuit has the feedforward compensation that I describe for the Low TIM Amplifier. If you build this amplifier, you must keep the wiring between the heat sinks and the circuit boards as short as possible if you don't want oscillation problems. When you test the circ...

Already reached the market the first LED lamp that replaces 100 watt incandescent bulb, this was the announcement of Osram Sylvania. She becomes the first to do is replace the new lamp will join the existing line of Ultra LED 40, 60 and 75 watt (equivalent to incandescent powers), it consumes 20 watts and have a lifespan of 25,000 hours about 25 times more than incandescent bulbs.It has a CRI of 80, an illumination of 1,600 lumens and a warm white color temperature of 2700k. It also is adjustable and, of course, free of mercury and lead. First LED lamp that replaces a 100 watt incandescent

CIRCUIT DESCRIPTION The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into the base of the second transistor where it modulates the resonant frequency of the tank circuit (L1 coil and the trimcap) by varying the junction capacitance of the transistor. Junction capacitance is a function of the potential difference applied to the base of the transistor T2. The tank circuit is connected in a Hartley oscillator circuit. Components List R1=220K R2=4.7K R3,R4=10K R5=100ohm C1,C2=4.7uF Electrolytic C3,C4=1nF C5=2-15pF C6=3.3pF Q1=BC547C Q2=BD135 P1=25K MIC=Electret Condenser Type P1 act as condenser microphone volume level. For FM, coil will be small. Use thin gauge enamel magnet wire. the diameter of coil will be a couple mm: use ink tube from pen to form, and try 8-12 turns. Small inductance ...

Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music player with the help of a stereo power amplifier. This does away with the need of a sophisticated in-dash car music system. Most mobile phones have a music player that offers a number of features including preset/manual sound equalisers. They have standard 3.5mm stereo sockets that allow music to be played through standard stereo headphones/sound amplifiers. Nokia 2700 classic is an example. A car audio amplifier with 3.5mm socket can be designed and simply connected to the mobile phone output via a shielded cable with suitable connectors/jacks (readymade 3.5mm male-to-male connector cable is a good alternative). Fig. 1 shows the circuit of car stereo player. It is built around popular single-chip audio power amplifier TDA1554Q (IC1). The TDA1554Q is an integrated class-B power amplifier in a 17-lead single-in-line (SIL) plastic power package. . Fig. 1...

      In this article we learn about a 1 Watt FM Transmitter amplifier with a reasonably balanced design specified to boost a RF frequency in the 88 – 108 MHz spectrum.             It may be considered a fairly sensitive configuration when used with quality RF power amplifier transistors, trimmers and inductors. It involves a power amplification factor of 9 to 12 dB (9 to 15 times). At an input power of 0.1W the output may be well over 1W. It's advisable to choose T1 transistor on the basis of the fed voltage. Considering you possess a 12V power supply in that case using transistors like: 2N4427, KT920A, KT934A, KT904, BLX65, 2SC1970, BLY87. At 18 to 24V inputs you may want to use transistors such as: 2N3866, 2N3553, KT922A, BLY91, BLX92A. You could also consider using 2N2219 at 12V However that would yield just an output power of 0.4W at the fullest. How to Calibrate this 1 watt fm power amp Initially don't appl...

Circuit diagram for TP2150B 2 x 200 watt power amplifier

Circuit diagram for AN7112: 0.5 Watt Audio Amplifer Circuit Datasheet for AN7112:  Download

General Description: The TDA 2003 hasimproved performancewith the  same pin configuration as the TDA 2002.  The additional features of TDA 2002, very low  numberof externalcomponents,ease of assembly,  space and cost saving, are maintained.  Thedeviceprovidesa high outputcurrentcapability  (up to 3.5A) very low harmonic and cross-over  distortion.  Completely safe operation is guaranteed due to  protectionagainst DCand ACshort circuit between  all pins and ground,thermal over-range,load dump  voltage surge up to 40V and fortuitous open  ground. Circuit Diagram: Circuit diagram for 10 Watt car radio audio amplifier Datasheet for TDA2003:  Download

Circuit diagram for TA8251AH: 30 watt 4 Channel audio amplifier IC

This circuit is mono amplifier use IC TDA1010A .Minimum voltage require 4V and maximum voltage 24V. To avoid damaged IC please use supply voltage 12 volt and must be filtering voltage. Power output 20 W with impedance 4 Ohm. IC equation with : TDA1011, TDA1011A , TDA1015 , and TDA1020. See circuit schematic and troubleshooting amplifier : If circuit circuit above not working , errors may occur in : Supply Voltage. Damaged Component , such as : IC , resistor or capcitor. Input output cable not connected. Damaged speaker. Short-circuit input with ground. Can be used for : Tuner Pream Head / Tape Mic CD or DVD player PC MP4 player etc.

Amplifier circuit here is all based on the ic in the gains. Three IC TA7230P, TA7236P, TA7237AP is intregated circuit (IC) which was applied to the power amplifier. Each IC has a different output, different input voltage, all IC TA7230P, TA7236P, TA7237AP is manufactured by Toshiba. TA7230P, TA7236P, TA7237AP amplifier schematic