Hacked Gadgets Forum

September 23, 2008

DIY Geiger Counter with USB Interface

at 5:11 am. Filed under Complex Hacks, DIY Hacks, Electronic Hacks


You probably don’t need a Geiger Counter but wouldn’t it be fun to have one? This DIY Geiger Counter project will not only demonstrate how to build one, this circuit will also connect to a computer using USB to grab the data. Since this device used very high voltage the output to the USB is opto-isolated to protect the delicate low voltage computer circuitry.

"The Geiger-Muller tube is a simple device, it’s a tube filled with a gas with two electrodes. A high potential is applied betweens electrodes. When a ionizing particle arrived, it create a temporary conductive path between electrodes. The resulting current can be detected by an electronic amplifier. A Geiger counter is composed of a high voltage generator, a geiger tube, an amplifier and a monostable. The following schematic show clearly these 4 parts. In the second part of this article will show how to connect this counter to a USB microcontroler and a computer. "

Thanks Sylvain


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2 Responses to “DIY Geiger Counter with USB Interface”

  1. Disappointed Says:

    Don’t bother with this, it’s almost cool except that the author has left out the parts value for most of the resistors, capacitors and the transformer.

  2. BroHogan Says:

    Just finished a DIY Geiger counter project. Schematic & sources are on my blog. The circuit avoids special parts like transformers as much as possible.
    “Part 1” is a “standalone” Geiger that does not require a uC. Part 2 (coming soon) will add an Arduino MCU and a 8×2 LCD.

    See Website for details

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