Hi Esteban
Can you tell me wich transistors should i use to made this ion detertor, to get positive ions.
I have plans to make a circuit with both detection posibilities ( positive and negative ions)
Regards
Nelson
Quote:
Originally Posted by Esteban
http://www.direct.ca/trinity/iondetector.html
I built it. You must paint with barnish the PCB and use fiberglass type for it. You can build the both type of detector for charges positives and negatives and commutate with a key. Transistorized but very effective. No need the plate to ground for to walk with it.
I make this experience: In an empty fuse put grain of bronze. (Remember that this bronze in grain is equal to hundreds million ohms, because is no perfect contact between the grains.) Now, if you touch with an only pole of a 1.5 volts battery, for example, the negative (ion detector is for negative in this schematic), the led glows. But if you touch with the positive of the battery the weak light of led vanished. Always the led is with weak light. If you use NPN transistors, you'll detect positive ions. Here the "coherer" with bronze grains. This don't stop the charge of a simple battery.
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