Ramsey Electronics PG13 Manuál s instrukcemi stáhnout pdf (Strana 24)

IG7 Page 24

Lets try some fun stuff now. Take the small neon light included with your kit

and hold on to one of the leads. Point the other lead towards the tubes in the

path of the discharged air. DO NOT STICK THE LEAD INTO THE TUBES! If

you look closely, you should be able to see the neon light periodically flashing.

This indicates that the air coming out of the pipes retains at least 60 volts of

charge which is going through the bulb and in to you! You don’t feel this be-

cause the current is very small. You may need to turn of the lights in the room

to see the flashes.

Look at the additional holes on the front end of the main board. These will

allow you to adjust the distance of the high voltage tips (the nails) from the

end of the pipes (the ion tube array) giving you to the ability to adjust the

quantity of air to ions ratio. The more air that is moved, the less energy the

ions will have when they escape the ends of the tubes, if they can even es-

cape at all. Can you guess which way the needles have to be moved to gener-

ate more air flow and fewer ions?

Using the 10 inch long piece of wire, solder it between one end of the neon

bulb and a ground point on the bottom of the main board. The solder mask re-

sist layer has been removed in the area of the screw mounts and provide a

convenient contact point for this purpose. Safety-wise, soldering the wire

firmly into place is best versus just wrapping the wire around one of the

mounting screws (less likely hood it will fall off!).

Try using the neon bulb method like before but this time use a stop watch

and try to count the number of flashes you can see in a minute. Position the

sensing end of the neon bulbs’ lead wire about 1/2” away from the end of the

pipes and start counting. Record your results for further comparison.

Now move the nails closer to the ends of the tubes by moving the nail board

forward. Repeat the same measurements again and record you count value.

Work your way through all of the mounting positions recording your results as

you go. Notice any pattern?

If the experiment went well, you should have seen that the closer the nails

are positioned to the end of the pipes, the faster the neon bulb would blink.

The neon bulb is actually giving you an indication of current, or the amount of

free ions in the air. Here’s how it works. The lead of the neon bulb that is

pointing into the airflow attracts the released ions. The terminals inside the

bulb act like a very small capacitor and allow a charge to build up inside the

bulb. When the built up charge reaches about 60 volts, the neon gas ionizes

and the bulb lights up. At this point, the current flow begins discharging the

small ‘capacitor’ and causes the terminal voltage to drop below around 40

volts. At this voltage, ionization of the neon gas stops and the light goes out.

If the ‘collected’ ions have low a potential, the neon bulb will not be able to

reach 60 volts break down voltage and it will never flash over. This does not

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Žádné komentáře

Ramsey Electronics PG13 Manuál s instrukcemi Strana 24