Circuit Power Supply

When you want to enhance Voltage from digital circuit that use power supply 5V to voltage 12VDC sizes. Which this work must use Dc converter model step up Voltage. I thinks this circuit good interesting. By use IC LT1073-12 then use good easy. See the detail in circuit picture. Can give current at output about 0.13A. For D1 give 1N5818 number or the number replaces.
source: http://www.linear.com

Product Description

Harness Powerful SPICE Simulation and Design Tools to Develop Cutting-Edge Switch-Mode Power Supplies

Switch-Mode Power Supplies: SPICE Simulations and Practical Designs is a comprehensive resource on using SPICE as a power conversion design companion. This book uniquely bridges analysis and market reality to teach the development and marketing of state-of-the art switching converters. Invaluable to both the graduating student and the experienced design engineer, this guide explains how to derive founding equations of the most popular converters…design safe, reliable converters through numerous practical examples…and utilize SPICE simulations to virtually breadboard a converter on the PC before using the soldering iron.

Filled with more than 600 illustrations, Switch-Mode Power Supplies: SPICE Simulations and Practical Designs enables you to:

• Derive founding equations of popular converters
• Understand and implement loop control via the book-exclusive small-signal models
• Design safe, reliable converters through practical examples
• Use SPICE simulations to virtually breadboard a converter on the PC
• Access design spreadsheets and simulation templates on the accompanying CD-ROM, with numerous examples running on OrCADË, ICAPSË, µCapË, TINAË, and more

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The following CD4017 circuits have not been tested and is presented here as a possibility only. If you experiment with this circuit please send me any problems found so that the circuit can be updated.

The following circuits are designed to change the duration of each positive output pulse from the astable timer. The circuits use a CD4017 Decade Counter / Decoder to provide nine or ten steps in the cycle.

The first circuit operates with a repeating ten step cycle. Each output pulse is longer than the previous until a count of ten is reached at which time the cycle will repeat.

The second circuit has a nine step cycle that stops at the end of the cycle. The cycle is restarted or reset when the RESET input is briefly made high.

The CD4017 can be configured to give count lengths between 1 and 10. Refer to the timing diagram in the CD4017 data sheet for a better understanding of the circuit’s operation.