Thanks to Nitesave.com founder Mark N hopgood for these plans. This is a work in progress.

Part 1: How to make the NiteSave switch for laptop, raspberry pi and stand alone.

NiteSave is a switch that allows you to really reduce your reliance on fossil fuels.

Linked with a battery or power wall it uses smart tracking to reduce your fossil fuel consumption in the following ways.

Utilise solar power - even if you don't have panels yourself.

Take advantage of waste energy production

Nitesave powers its batteries when the sun is out and when waste energy is available.

The power of it all lies in a switch with a tracker.

Kit list..

1. PC, laptop or raspberry pi

2. Microcontroller, e.g.
Adafruit trinkey - https://thepihut.com/products/adafruit-trinkey-qt2040-rp2040-usb-key-with-stemma-qt?variant=40019715784899
~£9 inc. shipping

3. I2C port expander
https://www.hobbytronics.co.uk/pcf8574an-i2c-port-expander

~£6 inc. shipping

4. 3 x spring mount terminals.
https://www.hobbytronics.co.uk/spring-terminal-4?search=4%20pin

~£8 inc. shipping

5. Prototype board
https://www.ebay.co.uk/itm/154352499080

6. 8 channel relay board ( sponsored )
https://amzn.to/3JNy8Kg

Cables.