[K3PZN-List] That dead battery Voltage Booster project

[Philip Karras]

I found my inductance meter and after re-educating myself on its calibration & use I measured the inductor I had made & found both winding at around 200 uH - which seems very reasonable to me with 20Turns of wire. I have the original cores I tried and will re-wire them to see what they are coming out as, as time permits.

I may also try more standard types of oscillators than the "quick and dirty" one that is not working to see if I can get anything going with this particular transistor or not.

Steve/AG1YK of Hints & Kinks in QST had a piece, December 2013, p52-53, where he had put an LED solar outside walk-light into schematic form and right there is an inductor of 100 uH a cap of 0.01uF & two resistors at 2KOhm resistor for the oscillator and a 1.2KOhm to the base of the NPN transistor. I must admit that I am more familiar with that type of oscillator circuit. All in all he had eight parts to the Instructables version with only three, transistor, core (2 inductors though), & resistor.

The simple Instructables design only has two inductors of the same value. I'm simply curious as to why it works for the author & a number of other people but no matter how I wind the inductor not for me. None of the simple circuits built thus far have oscillated, let alone produced any light with the 3V LED. Once I get it working I'll see about using a 6V LED which seem to be far more common now.

73 de KE3FL,
Phil

AEC Carroll County
OES, ORS, & VE
http://cs.yrex.com/ke3fl
Karras' Corner: http://blog.solidsignal.com/content.php/1005-karras-corner