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This is an early draft proposal for a solid, modular and distributed communication/monitoring system shared and operated by communities (not everyone needs his own equipment in a neighboring area). It will offer services locally for community members and the nodes should be interconnected worldwide to create a global network of free-to-access Communication- & Monitoring-Nodes (CMN).

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.

External-Antenna Hack for TP-Link TL-MR3020

Hacking devices always comes with the risk of breaking them in the process, which makes it often undesirable to hack on something, when you know, that you only have one device you may need for production purposes. Luckily, cosmo had a look at the Apollo-NG Wishlist and donated one more TL-MR3020 for the cause and as a result, it was pretty easy to figure out how to connect an external antenna to the TL-MR3020.

HOWTO - GL-Inet 6416 External Antenna Hack

[gl-inet-6416-external-antenna-hack-9] Since a lot of people continue to show interest in hacking their ML-3020 with an external antenna it was time to show how to do it for the GL.Inet 6416. The following modifications can be done in 5-10 minutes, give you a stable RP-SMA connector and have been tested and running here on 5 units without any problems.

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

Reminder: Gotta get more Spark Cores

I followed the Kickstarter campaign for a while but then I almost forgot about the Spark Core, which have finally become available. At first glance, the HW design looks solid and it comes with a complete open-source stack, including the hardware design, the firmware for the STM32 and infrastructure/server components.


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.

The Illuminator - A LED Light built from trash

Building things can be a lot of fun. Even more so, if the parts you use are things, that other people threw away. A while ago, the workbench needed a more appropriate lighting and 3 Luxeon 1W LEDs were lying around in the MISC box, other parts were collected from trash found in containers.