Blocking Oscillator fun and surprises.

[Legalizeshemp420]

I swapped R1 for a 10k pot and it seems the brightest spot is between 1.5k to 1.51k.

[Pirate88179]

Interesting that I googled "Blocking Oscillator" and a bunch of results showed up, BUT, there was no cross-refference to the Joule Thief circuit.  Not even on Wiki.  I have no idea why this is.  Do people not know that this is what the JT circuit really is?  Check this for yourself. 

Or, is the JT circuit different somehow?  I am not arguing either way I just thought that at least Wiki would have said "See Joule Thief" when searching for "Blocking Oscillator".

I don't really care what we call it, I do love what it is able to do.

Bill

[TinselKoala]

Have you looked at the current draw of that circuit?

[TinselKoala]

You dropped a decimal point as 1/0.0000005 = 2mhz not 20mhz so just add one more zero 0.00000005 to equal 20mhz.

What?
I never performed that particular division so how could I have dropped a decimal there?
You said you had 0.5 microseconds per horizontal division, but in fact you were displaying 0.05 microseconds per division.  My math is correct; you did not tell me you were using a 10x zoom setting on your scope.

[Legalizeshemp420]

What?
I never performed that particular division so how could I have dropped a decimal there?
You said you had 0.5 microseconds per horizontal division, but in fact you were displaying 0.05 microseconds per division.  My math is correct; you did not tell me you were using a 10x zoom setting on your scope.

My point is in that picture there are 9 peaks within a division and that division is .5uS as the zoom was put back to 1x.  That equals 18mhz but the peaks are not exactly 9 so the multifunction counter was correct.

Not a big deal and no egos need be bruised.  Frankly I despise egos so I am only telling you what the scope settings were in the picture you see.