One option is to create drip campaigns that can run automatically after creation. That way you've got content being fed to your audience on a schedule (X days from sign-up), and your overhead is much lower in terms of generating new content.

When you have something meaningful to say, you can send it out to the list ad hoc, but you're not on the hook to regularly generate new broadcasts.

I have a lot of experience setting up email marketing automation, as well as a strong technical background (I recently sold my marketing agency to take a full-time contract building custom web and native apps). On top of that, I'm also an experienced technical and non-technical writer (3 books and hundreds of articles under my belt).

If you're interested, I'd be happy to discuss some of your options for creating newsletter content that will continue working for you, rather than spending lots of time each week for single-purpose content. Drop me a line and we'll chat.

Good luck!