Hi,
I have built the BatterRUSEr.
Here is the latest version of my schematic:
And the board layout:
This is a photograph of the blank board next to an AA battery:
And the assembled board:
Initial TestsVin was set to 1.1V (nominal)
The load current was set to 250 mA (nominal)
Vin, measured at the board 1.0893V
Iin = 425 mA
Vout, measured at the board 1.4965V
Iout, measured 251.45mA
Power In = 463mW
Power Out =375mW
Measured Efficiency = 375/463 x100 = 81%Note: No attempt was made to optimize the efficiency. There is not too much I can do, only inductor selection.
Even with this simple measurement 20% of the power is lost in the boost converter.
I will do some measurements as time permits.
What would you like me to measure?
Regards,
Jay_Diddy_B