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‘Cuk-buck 2’ dc-dc converter – more fine art from Slobodan’s pen

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Slobodan Cuk, inventor of the innovative Cuk dc-dc topology has been at it again and come up with another innovative dc-dc, dubbed the ‘Cuk-buck 2’. He sees the partly-resonant design as a competitor to hard-switched high ratio topologies – such as for 48V to 1V conversion, where on-time is so short that GaN switching transistors …

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The Market Which Vanished

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In 1970, the world’s first digital watch, the Pulsar, was launched. It cost $1500 and was made by the Hamilton Watch Company. In 1973 Roger Moore’s James Bond sported one in Live and Let Die. The LED display had to be turned on for each reading of the time and the batteries typically lasted four …

Read full article: The Market Which Vanished

AWS CloudTrail Adds Event Source Filter for API Activity History

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AWS CloudTrail now supports filtering on the Event Source attribute when looking up events in your API activity history. This allows you to narrow your search results by the specific AWS services you are interested in. For example, you can now filter results to only show IAM activities such as role creation and policy application by filtering on iam.amazonaws.com in the Event Source attribute. 

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