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Reviews (1)
May 29, 2016
Good price. Works well.
2 of 2 found this helpful I recommend this inexpensive Geiger counter board and components. I bought it together with a Geiger tube (also bought on eBay). It would have been nice if they offered a complete kit including the tube. It would also be nice if they offered a kit with a plastic housing. For my project I ripped out the guts of an old TV remote control and put this board inside. This involved a small modification to add wire to enable the LED to be placed elsewhere.
The PDF assembly instruction manual provided is incredibly good. I am not an electronics expert so I appreciated the level of detail (especially the detail about how to understand the markings on the capacitors). For the resistors, I just used a digital multimeter to sort them (the standard stripes are such a pain to read). I'm fairly experienced in electronics soldering, but I found some of the holes in the circuit board were extremely close together (I'd say about 0.5mm or less between them). For those close connections, I had some trouble soldering some of those pairs of pins without having them connected by a solder blob (solder, verify, remove solder, repeat). I used a 40x magnifier to carefully verify that all of the solder connections were well made. Just be careful with the soldering and it should be fine.
Also, the piezo buzzer was not clearly marked for polarity as it was stated it would be in the instructions (it had marks near both of the terminals, not one as stated). However, I tested it in isolation (Googled how to do this) and it seemed to work regardless of which way it was connected. So I just picked a direction at random and soldered it. And it works (lots of ticking sound when near a radiation source.
Note that I also purchased a small quantity of graded uranium ore to test it with (from Amazon, each rock sold individually and graded individually to state its calibrated radiation level). This is how I know it works.
Also, my wife bought later a piece of antique glassware made with Uranium (they call it "Vaseline glass" and it glows under ultraviolet light). Since I now had this Geiger counter, I was able to test that glassware with it (and it emits quite a low level of radiation).
Anyway, good product. Verified to work. And really, its so very cool to be able to say that I have a Geiger counter. :-)