Tasel

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.

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.

This circuit ease you to control any appliance with infra red remote. Can be used for electrical devices like lamp, fan, etc. With power supply from itself, the circuit make the application compact and easy to control. The circuit looks for any modulated IR source and uses it to control a TRIAC, which then switches [...]

High-performance amplifier. Ultra low distortion but high voltage DC while operated. Using two on-board 6.5A fuses, just cause this circuit is capable of delivering around 300W of music power into 4Ω, each fuse carries around 4.4A RMS or higher.

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.

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.

A simple step up DC to DC converter with a maximum draw of about 800mA. Applying a op-amp as a square wave oscillator to trig an inductor and another op-amp in a feedback loop, provides a 24V power source for many uses.

Very small amplifier witch can provide 7W/4Ohm output. This circuit, although have small output, but capable to produce output with low total harmonic and cross-over distortion and work at 20Hz to 20kHz. The circuit using IC TDA2003 as main component.