New improved “Tiny Orbo Replication 2″ circuit
New and improved circuit for “Tiny Orbo Replication 2.” This circuit uses a small transformer, L2 and L3, to apply a small voltage during the current pulse to help maintain the pulse. For my particular setup, the difference in inductance between the primary and secondary of the small transformer is 100mH / 0.51mH = 196. Therefore the secondary coil, 0.51mH, will have sqrt(196) ~= 14 times less turns than the primary. So the primary has ~ 14 times more turns than the secondary. Of course every setup is different. The turns ration between primary and secondary depends on the total resistance and the type of diodes you’re using. Also, for the moment I’m only using one toroid. I’ll need to increase the inductance of L2 when the 2nd toroid is added.
The diodes, MBR20100CT, should be low Vf Schottky diodes with at least 40 volts reverse breakdown. The only reason my circuit shows MBR20100CT diodes is because that’s the best diode in the default LTspice database. I would make V1 a large supercapacitor, and eventually V2 will be a supercapator.
Click image to enlarge. Right click on image to save to you computer to help keep this circuit as open-source.
I am not affiliated with Steorn. Orbo is trademarked by Steorn.
2010, February 4 at 8:19 am





