Programmable Power Supply (PPS)

Introduction
In laboratory and experimental work, the source of energy electric is very important.
Most products in electronics require using the current and voltage source. I propose to develop a programmable power supply as my senior project. The requirement I propose for this project is that the programmable power supply will provide the user an output voltage from one to fifteen volts at a current level up to 1 amp.
Description
For the user interface, the power supply will con ....etc

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Variable Power Supp ly withDigital Control
The most frequently used device inelectronic workshops and laboratoriesis a universal power supply provides a variable, fluctuation-free output.Here we present a variable power supplywith digital control that is simple and easyto construct.The circuit is built around an adjustable3-terminal positive-voltage regulatorIC LM317, CMOS decade counter ICCD4017, timer IC NE555 and 3-terminalfixed negative-voltage regulator LM7912.The AC mains supply is stepped downby transformer X1 to deliver a secon ....etc

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i have ppt of 15 step digital power supply ....etc

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....etc

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Sir,
I have the requirement of documentation about/for programmable timer for appliances using 4020IC for project. So I request you,sir, to provide the required documentation as I will be so kindful to you.
Thanking you
....etc

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Abstract”
This paper presents a simplified sinusoidal uninterruptible power supply (UPS) system. The proposed scheme includes features such as high power factor, low total harmonic distortion and good dynamic response at the ac output voltage. In addition, the scheme has the desirable characteristics of high efficiency, simple circuit and low cost compared with a traditional standalone multiple stages UPS with power factor correction. The paper also presents the circuit operation, the analysis and, experimental results of the proposed U ....etc

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15-STEP DIGITAL POWER SUPPLY

INTRODUCTION
This circuit will obtain variable DC voltage from 1.25v to 15.19v in reasonably small step.
The steps are according to binary codes.
These codes are obtain using Up Down counter.
This circuit works on the digital principles as we are using binary codes.
OBJECTIVE
This circuit use to we can obtain the 15 step from 1.21 to 15.19v output voltage.
This circuit give variable output voltage. (+ve) Positive and (-ve) Negative
Use LED to indicate variable 15 step voltage ....etc

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Hi
I need information about programmable timer for appliance
Thanks for help ....etc

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A Digital DC Power Supply (programmable bench power supply unit), hardware version 3.0
Abstract:
A good, reliable and easy to use bench power supply unit is probably the most important and most used device in every electronic lab.
A proper electronically stabilized bench power supply unit is an important but also expensive device. Using a microcontroller based design we can build a power supply which has a lot of extra features, is easy to build and very affordable.
The tuxgraphics digital DC power supply ....etc

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Hi
I need information about programmable timer for appliance

Thanks for help
My email
[email protected] ....etc

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