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PowerSmart Solar Speeder, V2

2014-11-15 01:48  
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This must be the most efficient bipolar transistor motor driver design for this application and I recommend it for the solar roller competitions. A 1381E is used to trigger at 2.4V. While it takes a total of 10 components plus motor compared to the stock circuit`s 6 components, you will clearly get better performance compared to a stock Solar Roller/Speeder circuit. visit page.PowerSmart Solar Speeder, V2 - schematic
There are no losses during charging and the output transistor has a guaranteed low voltage drop under all motor load conditions while the normally wasted base current is absolutely minimized. To demonstrate the difference in wasted base current, measure t visit page.