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Old 10-22-2007, 04:39 AM
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Aaron Aaron is offline
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Join Date: Feb 2007
Location: Washington State
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self running oscillator

Hi all,

Just been tinkering with the oscillator. I got it so that I can disconnect the input battery for up to 20-30 minutes as it self runs. Yes, there are caps and I'm charging it with the 3rd isolated winding and running that to the input, then I can disconnect the input battery.

Anyway, I'm not posting diagrams just yet...tweaking it further. The reason I'm even posting this is to show what kind of input the transistor is getting at the trigger versus what is "supposed" to be required to trigger it.

The transistor I'm using is an RCA 2n3055. 2.7k ohm resistor at the base and a 10ohm resistor on the emitter.

VOLTS 0.35
AMPS 0.000037 (0.037ma)
--------------------------
WATTS 0.00001295 watts

The above volts and amps is what is being drawn from the caps on the output and voltage is what is at the trigger according to the scope set to 0.1v divisions...part is + and part is - so trigger voltage is actually less than 0.35 volts.

It is oscillating with that input from caps while it is disconnected from the input battery.
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