Why Donate? Because You're A Genius!
I know that you're exceptionally smart because you're visiting a site about robotics and electronics. But, that's actually a big problem.
Technology-savvy people don't respond to mass media the way ordinary folks do. You almost never click on an ad unless it is well-targeted from a sponsor that you trust. The click rate at scientific sites is much, much lower than sites with teaser articles on gold prices, celebrity gossip, or naughty bits.
I completely understand that intelligent people need to be treated differently. Museums, cultural institutions, and high-brow media providers (PBS and NPR) have long understood that certain products are not fundable through conventional means.
So, instead of performing SEO shenanigans to increase monetization (shorter articles, dumb-down content for the masses, greater ad density, institute premium content sections), let me give you a rational, mutually-beneficial basis for voluntarily donating to this site: Positive reward encourages behavior.
I'm the guinea pig. If you like my long articles with endless details, big pictures, and schematics then reward me with a treat. The donation is positive feedback that reinforces my behavior and stimulates me to produce additional articles that you enjoy reading.
Your money will motivate me and give me the means to write even more. This is something that you have some control over and will provide you with a real benefit.
So, if you're able, take a moment and throw $5, $20, or whatever my way. That helps ensure that I'll create the cool article that you'll be reading next month. In exchange, I promise not to interrupt your reading pleasure with a semi-annual fund drive.