LED TV troubleshooting Disconnect the mother board from the power supply the led will come on when plugged on the mains , that’s a sign that the power supply is good. Change the motherboard. You can also isolate all the cables from the power supply and just where the motherboard cable connects jump the power … Read more
150 Watt Subwoofer Audio Amplifier To drive high power subwoofer loud speaker we need power Amplifier then only we can get perfect bass sound from the input audio signal. Here IC TDA7294 Subwoofer Amplifier Circuit designed with minimum external components. The IC TDA7294 comes in a multiwatt package hence it can be easily connected with … Read more
Music power amplifier designed by using TDA2050 The TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide Up to 35W true rms power into 4 ohm load @ THD = 10%, VS … Read more
Battery Management System Lithium-ion batteries are now mega-popular. They have found wide application in portable electronics.But unlike other types of batteries, for example, lead-acid or nickel batteries, lithium-ion batteries are very demanding for the charger parameters. If you don’t control the process of charging and discharging of such batteries, they will fail soon.The banks can … Read more
5V / 2A Voltage regurator Voltage regurator Input voltage 9V-12V Output 5V /2A designed by using 7805 IC JM2955 Transistor BD240C Transistor
Replacement of 1N4728A 3.3 zener diode Use a series of 2.7V Zener with a normal rectifier diode (2.7+[0.6-0.7]=3.3-3.4V) Use 5 regular diodes in series. Voltage drop across each diode is .7 volts x5 = 3.5volts Use the 5.1 and take the output via 3 diodes forward biased. 0.6 volt drop per diode, you can slash … Read more
Bridge 19W Power Amplifier A polyester film capacitor is used 0.1µF
15W+15W Dual bridge amplifier Designed by using TDA7297 IC 15W+15W Dual bridge amplifier and it is most suitable for low power car audio amplifier. This amplifier IC accepts wide range of supply voltage from 6V to 18V. It produce good audio output with minimum external components hence board size becomes tiny. This IC has stand … Read more
Stereo amplifier 2 x 60W Designed by using LM4780 IC . LM4780 is a superb audio amplifier IC capable of delivering 60W Rms power output / channel into 8 ohm speakers. The LM4780 has very low total harmonic distortion (less than 0.5% at full output) and has a power supply rejection ration (PSRR) of 85 … Read more
10 Watt Audio Amplifier Circuit 10 Watt Audio Amplifier Circuit designed by using IC LM1875, it can drive 8Ω speaker and gives 10 Watt output. Lower power audio output required systems can use this 10 watt audio amplifier circuit, it requires few external components and low space circuit construction LM1875 is monolithic power amplifier offering … Read more