If you’ve ever worked on a tech project involving voltage and current measurements, you’ve likely felt the need to record those values for future analysis and decision-making. Personally, I’ve faced this need many times, especially when trying to determine the performance of a DIY wind turbine. Dealing with interconnecting cables to multimeters, ensuring the wind turbine doesn’t interfere with the cables, and making sure the camera correctly captures the values can be tedious and error-prone due to the number of variables to manage simultaneously.

In this project, I present the solution I developed to overcome this problem. I couldn’t find any commercial solution, so I had to develop my own. I designed a device that measures current and voltage at short intervals and calculates other variables such as consumed energy and power. These short-interval measurements are then integrated to continuously record the values for the duration of the measurement. All these values are sent via a WiFi connection to Blynk’s cloud servers, from where they can be monitored from any internet-connected device anywhere in the world.

The Blynk platform also allows for automation, such as triggering alarms in case of overvoltage, controlling other safety devices like electromagnetic brakes, suspending battery charging, among other possibilities. The options are endless.