Archive of posts from November 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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  • Rain Water Harvesting Update

    A long time ago, soon after I retired we build a DIY rain water harvesting at our place. We even made some upgrades along the way. Since it rains a lot here in Bangalore (or I should say used to rain a lot), we enjoyed a few good years of rain water harvest. For those of you who don’t know, there is huge water shortage here in Bangalore and any water we can save is extremely helpful. We generally use about 22 tankers of water in a year. But since setting up the rain water harvesting, it has reduced to almost half. Thus not only saving money but also water.

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  • Organic Gardening Update

    As we progress in life, things come and go. We start out with a plan and later it may fail or we stop executing it for some reason. Take the most common failed plans that most people complain about – exercise. When the new year rolls in some of us plan to exercise routinely and stay fit. Eventually, due to various reasons, some stop doing it. There were several plans I made after retirement, and some of them have either failed or we stopped them intentionally. One such plan was organic gardening. Just after retiring, we started to grow a small vegetable garden in the open space on the sides of our house inside our compound. I even built and programmed an automated drip irrigation system so we don’t have to worry about watering. But we stopped growing vegetables on the sides. So what happened?

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  • Be Prepared For Retirement

    There are many reasons one might want to retire early. Some may want to travel, some may want to sit and dream, and yet others might want to work on a startup or hobbies. Whatever the reasons might be, be prepared if the plan does not pan out. But more importantly remember that early retirement is not for everyone. I know a lot of people who have realized that early retirement is not for them. They don’t know what they would do if they retire early. For them, work is the thing that keeps them busy. That is a very good reason not to retire early and I am glad these people have a clear idea. While a few others want to retire early because the thought of freedom to do whatever you want sounds nice, or they are in a very stressful job. These kind of people can land up in trouble if they don’t have a plan.

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