I have a few coming from China. I will take apart one and see if its easy to replicate.
I did find this and it looks good. The output is 5 volts
Making the DC-DC Converter
The following parts are necessary to make this 0.7 to 5 Volt DC boost converter together with leads and either prototyping breadboard or soldering equipment and a board:
1 x MAX756
2 x 100uF Capacitors
2 x 0.1uF Capactitors
1 x 1N5817 Schottky Diode
1 x 22uH Power Inductor
Circuit Diagram
I did find this and it looks good. The output is 5 volts
Making the DC-DC Converter
The following parts are necessary to make this 0.7 to 5 Volt DC boost converter together with leads and either prototyping breadboard or soldering equipment and a board:
1 x MAX756
2 x 100uF Capacitors
2 x 0.1uF Capactitors
1 x 1N5817 Schottky Diode
1 x 22uH Power Inductor
Circuit Diagram
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