Tasel

This inverter circuit is very useful for low load application such as emergency light, radio, or DVD player. With transistors as main active component, please take more attention when you assemble this 100 W inverter circuit. Power source of this circuit just 12V DC, but can produce about 100W at 220V AC with simple assembling [...]

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.

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.

Here is a simple dancing LED circuit. Which based on NE555 & CD4017. NE555 is wired as an astable multivibrator to trigged the clock pulses for the CD4017. Pin 14 of CD4017 work as the clock input receiver, the outputs Q0, Q1, to Q9 (check pin diagram of CD 4017) becomes high one by one [...]

For large source supply at your amplifier or another application, this DC-DC converter is recommended. This circuit already tested, and no problem when connected the load.

This circuit is for a solar powered white LED which automatically turn on in the dark. Can be applied for outdoor or indoor night light uses. For indoor applications, when the circuit is operated near another lamp, it can be set to automatically active if the other lamp is turned off. Circuit features include selectable [...]

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.

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.