Tasel

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. Read more »

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. Read more »

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 power transistors pairs of MJ15003 and pairs of MJ15004, which have been arranged as symmetrical power darlingtons. Read more »

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. Read more »

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. Read more »

This circuit can be applied on any source of audio signal like microphone, mp3 player, radio, etc. The aims is smoothing the voices with echo. Using four ICs as main active components, produce a repetitious sound. Read more »

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. Read more »

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. Read more »

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. Read more »

Based on four chips, TL072, TL074, MN3101, and MN3004 which produce four channels of output, the center, rear, front right, and front left surround audio accommodated in a signal of left and right channels. The circuit however can be applied with other basic functions as a standard decoder. Read more »