Abstract—Power supply is a device that supplies electric power to an electrical load. A regulated power supply is one that controls the output voltage or current to a specific value the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply's energy source. A power supply may be implemented as a discrete, stand-alone device or as an integral device that is hardwired to its load which include the low voltage DC power supplies that supplies power to parts desktop computers and consumer electronics devices for example, dc inverters(dc15v), chargers(dc13v,15v), keyboard(dc15v), mouse(dc15v), all battery powered applications. The 15-step digital power supply is a circuit to obtain a variable dc voltage in reasonably small steps. This circuit mainly consists of four integrated chips(IC).The operation of the circuit mainly depends upon the operation of four IC’s. Those are a Schmitt trigger, a binary up-down counter, a voltage regulator and a decoder. The output voltage in this circuit is divided among the bridge fashionably arranged resistors. The output can be taken across resistors in steps varying from minimum to maximum.

Index Terms—digital power supply, schmitt trigger, binary Up-down counter, voltage regulator, decoder

Cite: M. Suman and M. Venu Gopala Rao, "Implementation of 15-Step Digital Power Supply for Utilities," International Journal of Electronics and Electrical Engineering, Vol. 2, No. 3, pp. 163-167, September 2014. doi: 10.12720/ijeee.2.3.163-167