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Auxiliary Power Unit

The Auxiliary Power Unit (APU) is the fourth column in the group of independent and mobile energy sources. In case of over-budget power demand or a longer period of heavy weather (no sunlight for days), the APU will supply the batteries with power, generated by a small internal combustion engine.

Blockchain based Micro-Grids

Here is a great story about the beginnings to autonomously produce, share and manage local energy harvest and consumption in blockchain based micro-grids: Politico Magazine - Brooklyn’s Latest Craze: Making Your Own Electric Grid solar power blockchain energy microgrid

Blu-Ray nanopatterns to boost solar (PV) efficiency

There are often reports about breakthroughs in alternative technologies and when I look, I can find charts claiming that in 2014/2015 top solar conversion efficiency is reported to be at about 45%. However, when I look harder I don't seem to find obtainable Panels above 21%. The highest grade I could get were the Mobile Technology MT-ST110 panels on the Odyssey (Command-Module). I can't help but to ask myself:

Clear-Sky Solar Prediction: First Test-Results

Since it's currently winter in central Europe, it's the perfect time to evaluate the Unified Clear-Sky Solar output Prediction Model for its feasibility/validity. After bringing the VFCC online, it was a simple task to ship prediction metrics and reference measurements into influxdb and create a couple of dashboards to create meaningful graphs to evaluate its performance very easily.

Common Table of Geiger-Müller tubes

You can edit this page of the wiki without login to add or update the table. Just use the edit button at the top of the menu on the left. This wiki page should serve as a common place where we can note/compare/discuss our reference conversion settings to have a more reliable data basis for our calculations and equivalencies.


* Multi-Stacking Modules * Build a common model for generator scaling according to rotor size * The generator module should always be at the bottom of the mast, reducing the top load of the mast and also making the generator more accessible for maintenance.

PiGI - Raspberry Pi Geiger-Müller Interface

Geiger counters are basically just devices which enable us to measure ionizing radiation. In the context of human activity we have to deal with “natural” radiation sources and “artificial” ones. Some of the materials emitting ionizing radiation are used for medicinal purposes (Radiation-Therapy), as an additive in paint and even in smoke-detectors but the majority of it is used to create electricity in nuclear power plants and to stockpile thermonuclear weapons of mass destruction (well, except …

PiGI Hardware

Schematic V1.1 Layout V1.1 Prototype PCB's V1.0 Download Layout & Schematics (Eagle 6.2.x): <> Circuit Details The Pi-GI circuit is divided into two parts: * Kickback High-Voltage Switching Power supply * Impulse Inverter

PiGI PCBs are now available on

Nordrunner produced and shared PiGI - Raspberry Pi Geiger-Müller Interface PCBs on, which are now available for everyone. If you haven't had a chance to get PCBs from fehlfarbe or shipping from Germany wasn't an option for you, you can check it out on <>.


Check it out on github: <> Overview pyGI Server The pyGi server component is implemented in python and uses the RPi.GPIO python library to take care of handling the interrupts, generated by the impulses coming from the PiGI.

Unified Clear-Sky Solar output Prediction Model

Using the sun as a sustainable energy source isn't really a new invention. Plants have been relying on it for millions of years and have developed and optimized the process of photosynthesis over a very long bio-evolutionary period. Almost everybody appreciates the comfort, when it's warm and the sun is shining but we very often forget how hard our ability to actually survive as a species, is linked to solar output: