Posts tagged with "raspberry-pi"


  • Nov 27, 2023

    DC Energy Measurement Using PZEM 017

    You might remember that I have been looking for an accurate DC current measuring device for a long time for my solar project. The hall effect sensors I have been using in my solar project was inaccurate. Basically the zero current point drifts quite a bit depending on the ambient temperature and power supply voltage. While a shunt would give more accurate zero cross overs, I did not want to modify my setup to use it. You see, the problem with shunt resistor based sensors was that they have to be inline with current. Which means I have to remove a bunch of wiring from my battery and UPS and insert these sensors inline. I was not willing to do that. However I recently came across another project which would be a good fit to test out these shunt resistor based sensors. So I tried a couple of them and what follows is my experience with one of them.

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  • Oct 30, 2023

    Converting a USB printer into a WiFi Printer

    We have an old USB laser printer which was purchased in early 2012. It has been in fine working condition since then. I rarely use it because usually there is nothing much to print. We do the occasional flight ticket print outs. Once our daughter was born there was a little bit more printing. I changed the toner just twice in these 11 years. Anytime anyone in the family needed a printout, they would connect their laptop to the printer via USB and print. Although it wasn’t that much of a hassle, I wanted to make the printer a wireless one. This post is about how I achieved it. As you can imagine, it can get technical and if you are not into computers and software, it is better you skip this one :).

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  • Jun 26, 2020

    Does Lightening Strike Twice?

    You would think that one would learn from past mistakes. But no, not me apparently :). With in a week of the last major electronic equipment blowup, there was another lighting strike blowing up another router. That and more coming up soon. Stay tuned.

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