Full-wave Controlled Center-tap Rectifiers

To build a controlled rectifier or a phase controlled rectifier, the diodes in the rectifier circuits are replaced by SCRs. These circuits produce a variable DC output voltage

SCR Protection

To obtain satisfactory and reliable SCR operation, it is necessary to provide protection against over voltages and over currents.

SCR Gate Triggering Circuits

For proper operation of circuits using SCRs, the trigger circuits should supply the firing signal at precisely the correct

SCR Turn Off Commutation Circuits

If an SCR is forward-biased and a gate signal is applied, the device turns on. However, once the anode current IA is above the holding current,

MCT & SCS Thyristors

MCT (MOS-Controlled Thyristor) and SCS (Silicon Controlled Switch) are the low power devices belong to Thyristor family.


Three types of rays emits continuously from a radium material. These rays are known as alpha rays (a rays), Beta rays (p rays) and gamma rays (x rays).

Ultrasonic Waves

The frequencies which are beyond the limit of hearing are called ultrasonic. The ultrasonic waves are of frequencies above 20000Hz (20 KHz).

Transistor Timer

In electronics timers the output of the timing element is used as a trigger pulse for BJT, FET and UJT, the active devices element signal


The transducer may be defined as any device that convert the energy from one form to another, Most of the transducers either convert electrical