Tasel

This circuit possible to deliver about 200W power output produce by Phillips Semiconductor. Using 2 PHP1BN11QT, input voltage between 30 and 45 VoltsDC for this circuit, trigger the 4Ω impedance load speaker in to a powerful audio output. Other features of this circuit are THD+N (total harmonic distortion-plus-noise) PL = 10 W frequency range from [...]

TDA7294, monolithic IC with output up to 100W as main core for this useful audio amplifier. This circuit is a mono for a single channel in 4Ω or 8Ω load. Simple audio class A-B amplifier.

Based on three characteristics: good quality sound, easy to make, and not expensive circuit, this TOSHIBA DX is worth to try. Just need 36VDC voltage input as a fuel, the circuit can produce 100W output on 40 Ohm speaker or 50W on 80 Ohm, using a pair of TOSHIBA A1943 – C5200 per channel.

This 400 W MOSFET Audio Amplifier using IRFP448 circuit is simple project. With low noise and distortion, but powerful. As the fuel, this project consume 70-80 Vdc and 5 A fuse as the protector for short circuit.

The circuit of this 30W audio amplifier produce a clear audio output quality. The circuit module doesn’t have any improvement. With Darlington pair in transistor TIP141 and TIP146. This transistor need heat-sink or better temperature.

Power amplifier settled on HEXFET IRF9540 and IRF540 which probably produce 65 W at the output. This circuit is simple and have a good audio quality. For thermal static, use heatsink on Q8, Q10, Q11, Q12, and Q13.

Mini stereo audio amplifier with low distortion. Take about 10% distortion on 4 Ohm – 8 Ohm loudspeaker. The LM4756 can delivers 7W power output. This small audio amplifier also featured quiet fade-in/out mute function, stereo variable line-out pins, AC output short circuit protection, and thermal shutdown protection.

With 4 pairs of 2SC5200 and 2SA1943, this circuit can produce about 500W. Voltage input as the fuel is +/- 65V. And for best result, you must use heatsink and fan. This circuit also feature circuit protection using fuse.

Here is a portable headphone amplifier for your music player. This circuit improve the gadget audio outputs with low noise and distortion, as well as a long battery life. With an external amplifier, the headphone driver in the music player is no longer required to supply high currents into a low impedance.

Conventional power amplifier with high-pass and low-pass filter. Supplied 60V DC, this circuit can produce about 300W sound power. Opamp NE5534 is arranged as a differential amplifier, output of NE5534 is applied to drive stages MJE340 and MJE350 via R6 from pin 6. The output amplifier proper consists of drive stages MJE1530 and MJE1531 and [...]

Very high power amplifier with 10 pairs of power transistor. Can use MJ15024 and MJ15025 or MJ21193 and MJ21194. Those 20 pieces transistor work as final active component for final gain. This circuit required dual output power supply 130V.

DVD Signals RF modulator circuit which also can be used as a RF modulator. The brightness can adjusted by trimming the P1, P2 control the contrast of video signal. The circuit output is RF modulated and can be receive in VHF band.

IC Op-amp 741 as main chip for Infra Red receiver and transmitter. Infra Red LED connected with SCR trigger by pulse which produced from this Op-amp 741 when the SW in close position.

Using IC 4001, 4027, NE555, and CA3130, this circuit can convert 24VDC to 220VAC 300W. A pairs of MJ15003 or 2N3773 as the last active components before drive the pulse into the transformator.

Based on super hetero dyning principle. The circuit using 2 RF oscillators. The frequencies of all oscillators are at 5.5 MHz. The first RF oscillator consist of transistor T1 (BF 494) and a 5.5MHz ceramic filter. The 2nd oscillator is a Colpitt’s oscillator accomplished with the help of T3 (BF494) and inductor L1 shunted by [...]

The circuit below is an automatic switch-on emergency light. With IC as automatic controller, and and over charger protector. This circuit will drive the light on when the main power from AC source dismissed.

Conventional power amplifier with high-pass and low-pass filter. Supplied 60V DC, this circuit can produce about 300W sound power. Opamp NE5534 is arranged as a differential amplifier, output of NE5534 is applied to drive stages MJE340 and MJE350 via R6 from pin 6. The output amplifier proper consists of drive stages MJE1530 and MJE1531 and [...]