How To Power The Arduino Uno With A Solar Panel

The primary objective in designing a device running in solar power would be to reduce power consumption.

How to power the arduino uno with a solar panel.

The primary objective in designing a device running in solar power would be to reduce power consumption. The computer recognizes the device the current supplied to the board is 500ma at 5v. Battery capacity is 1300mah c 10 130mah the solar panel has to provide current 100mah for arduino along with a current not more than 130mah. The solar panel is most efficient at a point called the maximum power point which is surprisingly not the maximum voltage 10v but a little less 8v.

An arduino uno draws approximately 50 ma over 2 1 2 times what a nano requires at 19 ma. This is called the short circuit current. An arduino unodraws approximately 50 ma over 2 5times what a nano requires at 19 ma. When the panel provides its peak power the current draw is around 650ma.

A solar panel that can rotate in two axis either automatically using four light sensors either manually with the aid of two potentiometers. The pro mini with 4 7 ma brings 11. Battery voltage 1 2 x 2 2 4v so required voltage for solar panel 2 4 x 1 5 3 6v by taking some margin we can choose a 4v solar panel for it. A time switching battery powered solar charged circuit used to power an arduino uno and some peripherals.

Solar charged battery powered arduino uno. The three pins are for in gnd out so all that you need to do is wire both the in solar panel pin and the out arduino vcc in order to get the power from the solar panel to go through the regulator and out to the arduino at a fixed rate. First you ll have to assemble the solar powered battery charger circuit. Multiply 8v by 0 650a and you get 5 2w.

If the connection is enumerated i e. See more on the always on page. This circuit was based on the awesome tutorial by deba168 solar powered arduino weather station. If the connection is not enumerated 100ma is supplied at 5v.

This uses the energy from some solar cells to charge the batteries and boosts the voltage from it to the 5v used by the arduino uno. Once the batteries build up a bit of a buffer of power from solar normally about 20 minutes the battery will power up and restart your arduino. If the v15 v50 v75 or v88 run out of power while in always on mode your arduino will stop working. Using the 3 pin voltage regulator is simple.

Project in progress by igor fonseca albuquerque. The sensor module along with arduino taking 100mah current. The pro mini with 4 7 ma brings.