Pacificware, Inc.

Santa Clara, CA 95050


Fax: 612-241-5375



recent additions


A reference design for a Next Generation USB variable power supply has just been released!


USB Variable Power Supply (Version 2)


We also recently released these designs:


USB UART Analyzer


USB Variable Power Supply


I2C Protocol Converter


USB Serial Port LED controller




At Pacificware, we're always considering applications we develop for general availability. Listed below are the most recently posted. The rest can be accessed on our Downloads page.


Computer Lockout for Kids




Serial Port Script

coming soon


Source files for these applications will be posted soon:




Periodic Power Monitor

USB Variable Power Supply (Version 2)


We pushed the requirements a little harder this time. We wanted a USB controllable device for setting and monitoring voltage. We wanted a smaller case. Also we needed a little broader voltage range.


This device goes from 1.5 volts to 5.1 volts.


Debug Board Iso


Our projects never use 5V anymore. These days, we usually require 2.8V, 3.3V or LiIon simulation from 3.6V to 4.2V. This little variable power supply covers them all.


USB Variable Power Supply Iso


A PIC18F24K50 is used to monitor the voltage with 100mV accuracy. Press the monitor button to monitor current with 10mA accuracy.


Debug Board Iso


The power supply is continuously adjustable from 1.7 to 5.2 volts using an encoder. The low and high voltages are shown on the display below along with some of our most used voltages:



USB Variable Power Supply USB Variable Power Supply USB Variable Power Supply


USB Variable Power Supply USB Variable Power Supply





*The Source schematic file includes:






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