Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell Battery

An Arduino Uno runs less than one day on a 9 V battery because it uses about 45 mA current. Using an Arduino Pro Mini, with a simple modification, the power consumption goes down to 54 μA (0.054 mA) with the 3.3 V version or 23 μA (0.023 mA) with the 5 V version, in power-down sleep. That is 4 years on a 9 V battery with 1,200 mAh capacity or 2,000 times more efficient
- Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell Battery

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The 1 Million Lumen Lamp

A single 1 Million Lumen High Intensity Discharge Lamp gives more light than 1 000 conventional filament bulbs. While there is currently a period of fast advancement in LED lights, older technologies as High Intensity Discharge Lamps (HID) (also called High-Pressure Discharge), and Fluorescent Lamps/Tubes (also called Low Intensity Discharge) are taking big steps forward. What is a 1 Million Lumen Light used for? It is intended to light up indoor and outdoor TV sets. For example, if you
- The 1 Million Lumen Lamp

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LED Dimmer for 220-240V Lamps HowTo

This article is primary for those in a country with a 220-240V~50Hz electrical system. Do you know how it is when you sit in a room, somebody comes in, turns the light on and it becomes way too bright? If you turn off the light again, then the other person won't be satisfied. So why not agree on a level between no light and full brightness? This a