1.4 study variables. 1.4.1. the variable power generation exercise bike 1.4.2. electrical energy quantity is variable. 1.4.3. the control variable is the device circuits/battery/spinning force. 1.5 scope of education 1.5.1. What can the study of cycling with feet and can charge the battery size derived electric. Solar charge controller by V. 12 comes charging battery control spinning speed, which must be located at 50 cycles/min. 1.5.2. the length of time between the date of 19 February 21-2557.
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