Tasel

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.

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.

Basic operation of this circuit is similar DC to DC converter. With input from 18VAC at 800mA then converted to DC by B1 bridge rectifier. R11 work as adjuster, a twin of IRF510 as final amplifier, and a CT transformer is the last converter to provide the high voltage output.

The circuit using active component to operating. In this case, the active component is IC NE5532 or TL072 as a linear part. With 15 V power supply, this circuit separate the low out and high out. The low out connected to a woofer, and high out in tweeter.

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.

Here is the VU meter with 12 LEDs circuit. This is an easy visual indicator of the audio level signals. Can be applied to various input levels, adjusted by trimmer TR1 (state) – TR2 (Gain), then rectified by diodes D1-D2 (standard negative mark-recovery periods) and provide in the main circuit indication, consisting of the diodes [...]

Can be a standalone or teamed with Pre-Amp, this circuit show us a high-class headphone amplifier. With low distortion and noise, its seat drive low or high impedance to max power levels. Need only a power supply and a volume control pot for apply among any line-level signal source, and featured dual output.

Work as pre-amp modul, this circuit offers 20db+ of clean boost. RC & AC Booster Guitar Effect by Xotic also featured controls for volume, gain and EQ controls for treble and bass. With 9V power DC, this circuit is easy to use. As the name, “RC” is mean Really Clean was tested.