Building a Variable Voltage Power Supply - Martin Catt
By popular demand, we proudly bring you Martin Catt's three-part article on building and using a variable voltage power supply for testing quartz movements. These articles are provided in Adobe PDF format, and are published here with permisison of the author.
The third article has many diagrams and photos and is fairly large (approximately 4.5MB). For best results, download the files to your computer and then view or print them. This can be done by right-clicking the link below and then choosing "Save Target As..." or "Save Link As..." (depending on browser).
Our thanks to the author for making these articles available to the watchmaking community. They were originally scheduled for publication in the AWCI "Horological Times" magazine, but AWCI chose not to publish the articles because doing so might offend one of their advertisers who sells really expensive testing equipment!
Power Supply Considerations for Measuring Lower Working Voltage Limits
Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 1
Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2
If you have difficulty downloading the third article (above) it is also available split into two parts:
Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2a
Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2b