When it comes to a 5V negative voltage regulator, we usually choose the 7905 three-terminal negative regulator chip as the first choice because it is both easy to use and cheap. Plus, it can supply up to 1.5A when equipped with a sufficient heatsink. We can also turn it into an adjustable voltage regulator by … Read more
It is a low-drop regulator, which means that it reaches its maximum efficiency with an input voltage that only needs to be a little bit higher than the output voltage, or around 0.9V to 1.2V. Read more
This circuit consists mainly of the following components: a solar cell, a DC pump, a 555 timer, and an LM311 comparator. It worked well and was also very efficient, requiring only power from the solar cell rather than a battery. Read more
A solar-powered water pump circuit for a place with no power outlet, with a battery. We’ll learn how to use a MOSFET instead of a relay, as well as the NE555 timer circuit. Read more
If we were to use a DC water pump without an AC outlet, most likely we would power it with a 12V lead-acid battery. It is quite convenient, although their life span will shorten drastically down to around two years. However, there are things that we can do to prevent this, which are also features … Read more