Finished Geiger Counter Electronics Kit Welding Project Practice Kit Nuclear Radiation Detector Miller Tube Assembly Finished Product

Clean soldering, includes a NEW Geiger-Muller tube, not some WW-II Russian surplus! Includes several cables for different input power and pulse output connections as well as a 3xAAA battery case for portable operation. No documentation, but it's intuitively obvious how to connect and operate.

The title is a bit misleading - this is not a DIY kit but a fully assembled Geiger counter (assembled with minimum quality).Another issue is that the Geiger tube was bouncing around in the unit when it arrived, luckily intact.With that said, it ticks, and ticks a bit faster when an Am-241 source was placed next to the tube (note the tube doesn't work with alpha particles). So I suppose it could warn me if radiation levels get bad...

The media could not be loaded.  Came assembled. Also came with cabling for power supply, battery clip, and i/o for monitoring.I took it to work after testing it at home. It seems to be pretty sensitive, although I have nothing to compare it to. Random clicks with ambient reading, which increase dramatically when I bring the innards of an old smoke detector near the Mueller tube.I designed a cylindrical case for the tube and added about a meter of 24 gauge wire to connect it (see pictures). So now my counter has a "wand" sensor. It actually seems to be more sensitive set up this way. I will be making a new case for the main unit and adding an Arduino to count the pulses and give a relative reading.

Very misleading description. Was supposed to be a soldering kit, do it yourself. Arrived completely soldered. No fun in this.

As others have noted, this comes fully assembled rather than as a board and components, but that's probably a good thing since it comes with absolutely no documentation whatsoever. The board looks like it was hand-soldered by someone with even less soldering skill than me, but it also does seem to work fine. You probably want to check that the tube is properly seated in its connectors before use and you may need to bend the connectors a little to stop it shaking loose again.Despite the lack of documentation, a little bit of investigation with an oscilloscope showed showed that you can get a TTL-level pulse output (normally high, one 250us pulse low per particle) from the pin marked "VIN" on the three pin header at the end. While calling this output "VIN" (next to the GND and 5V lines) seems a little misleading, this does allow you to both get the signal and power a micro-controller from a single header.Note that this sort of Geiger counter tube generally only detects beta and gamma radiation since alpha particles are not very good at penetrating the metalised glass tube. If you need to detect sources that only emit alpha radiation you'll need something else.At the end of the day a fully functioning Geiger counter that can be connected to a computer for $42 seems like a good deal.

Trash not diy, not soldering kit. Pre assembled crap. Does not function.

Nice, I do have 2 of those.Quality can vary tho....

I don't know why people are getting all upset by the company name. They were clear in the description that it's an assembled unit.This board appears to be a clone of the CAJOE v1.1 Geiger counter.I got this with the intention of making a nice display for it, and adding some other sensors to the package.When mine arrived, I put the batteries in, and started checking everything in the house. I was hoping that some Chinesium stuff would be hot. :) As it turns out, nothing in my house was radioactive. I did test it against friend's uranium glass marbles, and those do click.There is documentation of the same board from other companies. Look around for CAJOE, or "arduino geiger counter"There are some faults with the case, but I think that's really just there until you replace it with something better. It would have been nice for the space above the tube to be vented. Even just acrylic can stop Alpha and Beta particles. But like I said, it's there to protect the board and tube, until you put a better one on, with a display so you can see how much radiation there is.The clips for the tube seem to be slightly too far apart. You can get it in, and it is in from the factory, but it seems to have a tendency to slide out of one. Obviously if it isn't plugged in correctly, it can't detect anything. But I feel that mount is also just there until you make something better for it. Be careful with the tube and the ends, that is a high voltage device. The board bumps the voltage up to about 300v for the tube to detect radiation.The tube is interchangeable, as stated in the listing. I suspect it can take the same tubes as the CAJOE Geiger counter, and other cheap Geiger counters like it. For the most part, they're old Soviet era surplus, which is great for us. I doubt we'd have affordable Geiger counters today without those tubes.I'm not sure if this product is no longer available, or they're just out of stock. I got mine, and it had a pretty big discount. If it does come back into stock, at a reasonable price, I'd recommend it for anyone that wants to expand and improve it with a microcontroller and display(s). It seemed silly for me to buy one with the character display and crappy case, just to throw those parts away.