On Wed, 2 Jul 2008 13:49:49 -0700 (PDT), "jalbers@[EMAIL PROTECTED]
"
<jalbers@[EMAIL PROTECTED]
> wrote:
>I am experimenting with a relaxation oscillator circuit consisting of
>a NE-2 bulb wired parallel to a capacitor and this pair is wired in
>series with a resistor and connected across a 150 V DC power source (a
>bunch of DC wallwarts connected in series). The resistor is variable
>0-1 Meg Ohm, the capacitor is a 1uF electrolytic rated at 160V. I
>don't have any capacitors on hand with a higher working voltage.
>
>The circuit seems to work. I can get the bulb to blink around 3 times
>a second but I am wanting a higher flash rate and I am not getting
>it. Lowering the resistance makes the bulb turn on continuously. I
>don't think that the bulb is fla****ng faster than the eye can
>distinguish. I conneded the circuit to an oscilliscope and when the
>bulfb is visually fla****ng I see the RC discharge curve but lowering R
>until the bulf truns on continuously pretty much produces a flat line
>on the scope.
>
>I was expecting to maybe be able to get around 2-100 hz with a NE-2
>relaxation oscillator. Is this possible or am I expecting too much
>from this type of circuit? And if so, why?
>
>Any help would be greatly appreciated. Thanks
Smaller cap. Then, for fun, put two neons in parallel. Then try waving
hands around, ****nging lights on them, whatever.
John
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