## Energy budgets

Scenarios

* Constantly on wired power
* Periodically used on battery, else plugged in
* Always/normally battery powered
* Energy harvesting. Never connected to charger, should run forever

### Energy harvesting

Energy harvesting rules of thumb:

    Outdoor light – 10mW/cm2
    Industrial temperature difference – 1-10 mW/cm2

    Industrial vibration – 100µW/cm2
    Human temperature difference – 25µW/cm2
    Indoor light – 10µW/cm2
    Human vibration – 4µW/cm2

    GSM RF – 0.1µW/cm2
    Wifi RF – 0.001µW/cm2

[AI and Unreliable Electronics (*batteries not included)](https://petewarden.com/2016/12/29/ai-and-unreliable-electronics-batteries-not-included/). 

### Wireless transmission

```
TODO: overview of typical energy requirements, for different wireless tech
TODO: overview of data transmission capacity, for different wireless tech
TODO: overview of sending range, for different wireless tech
TODO: cost (monetary) of data transmission, for different wireless techs
```