LaserSaber SJR vs Joule thief vs MT3608 vs qx5252

This shows a relative comparison of the 4 most popular circuits I run with my projects. The 4 have their own use cases and efficiency curves.
Given the new mA readings, I can now say the SJR is efficient at high voltages but comparable to the MT3608.

FULL Specs
- SJR V3.0 from LaserSaber - GU Ferrite Magnetic Core
- Joule thief configured from the same SJR GU core
- Boost converter used is the MT3608 found all over.
- qx5252 Chip as configured in common garden lights.

[Kangsteri]

Good videos. Thanks. For what I have seen the joule thief works cause of high frequency. But the SJR Looper has two different high frequencies that create beat frequency in the system. When you touch it it goes brighter cause you act as Loading coil (capacitor to virtual ground). Loading coil means that variable coil to ground makes the frequency lower, or variable capacitor makes the frequency higher. Seems like we need to aim for super high beat frequency. But then it's usually a matter of the qualities in the components. Everything that old timers say about RF and UHF will apply to these circuits too.