Simple Electronic Circuits

Updated Circuit: This circuit is used to drive a regular a/c cfl bulb or a LED bulb upto 32 watts. You can try it by using bulbs with higher watts or changing the transformer. The output of sg3525 is fed to the transformer through two Mosfets. The pinout diagram of sg3525 is given below: IRFZ44 Pinout Circuit Working: The circuit is pretty simple and is based on an SG3525 controlling pulse width modulator IC that runs a couple of MOSFETs and a push-pull step-up transformer. The capacitor at pin 5 and the resistor at pin 6 set the on-chip frequency. The frequency of the output is cut in half by an internal flip-flop, and the flip-flop's output drives buffers that can source or sink more than 200mA. The two MOSFETs Q1 and Q2 are driven by the buffer's output at pins 11 and 14. The high output current is perfect for quickly charging and discharging the MOSFET gate capacitances, which makes for fast switching times. This means that the MOSFETs work well and lose littl...