Self Running Micro TPU, with closed loop.

[4Tesla]

@btentzer
Since the circuit uses a pot, you should be able to get a good range in frequency.. including 7.23 and 7.3hz.  The calculations are based on a conventional RC filter circuit.. I don't know if the trigger coil has an effect on the frequency or not.

Good Luck.. I can't wait to get the cores so I can join in on the fun! 

Edit.. I was thinking maybe the direction the coil is wound effects witch way the transistor goes in the circuit.  Also you will need to measure the frequency somehow to adjust the pot to the right frequency.. does your DMM measure frequency?

Edit2.. I calculated the range for 100k pot in series with 1k res.. 101k - 4.8hz and 1k - 482.5hz

Edit3.. If you can't measure the frequency, I calculated the values needed.. you can use your meter to measure the resistance of the pot.. 64k - 7.5hz, 66k - 7.3hz, and 67k - 7.2hz... Also you can replace the 1k res with a 62k res and the 100k pot with a 10k pot for finner tuning.

Edit4.. I almost forgot, you need to subtract 1k because of the 1k resistor.. so for 7.5hz the pot resistance would need to be 63k and not 64k.

Edit5.. RC parts list:
  Potentiometers - 10K, and 100K
  Resistors - 1K, and 62K
  Capacitor - .33uF

Edit6.. What is the diameter of your toroid?

Thanks,
4Tesla

[quantum1024]

There is no way to have OU with this circuit without applying an outside input, which is why I mentioned it a couple pages back that a pulser motor was needed to maintain both charging and recycling charge. I'm almost done both the pulser/flywheel and the circuit. should be interesting. This circuit is unique in that it uses least amount of parts to get the job done (efficiency) and configurable. The pulser/flywheel should produce that extra time increase by maintaining the charge duration in any case.

P.S. does anyone know of an electronic circuit equivalent of a mechanical flywheel? is there even one? I was thinking of capacitor/coil combinations, but it does not exactly show both mass, centrifugal force and angular momentum ? or do I have the wrong idea here?

[4Tesla]

@quantum1024

I like your avatar!! 

4Tesla

[hakware]

A quick way to see if its getting excess power is to calculate how much power the led is using. is that not the load?
it seems that a 22uf capacitor should not blink an led for that long under any circumstance. The problem is that every led is different and not a precision device as far as current drain forward voltage drop etc.  That could be reasoning that were seeing such wild and varying run times.

anyone have a current probe on their scope to figure out what the power factor on this is?

[4Tesla]

Yep, the LED is the load.  You can hook your meter in series to get the current.

4Tesla