The scenario
A simplified USB rechargeable fan circuit using a TP4056 charger IC, Li-Ion battery, SPST power switch, potentiometer for speed control, and a resistor representing the fan motor load.
What is in this drawing
Read the decisions behind it.
01
Using TP4056 for Li-Ion charging
02
Potentiometer as speed control
03
Resistor dummy load for motor
When instructing on basic portable fan electronics or battery charging systems with speed control.
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