The scenario
A household solar-powered rechargeable table fan where a panel charges a Li-ion battery through a blocking diode, and a manual switch controls the DC motor.
What is in this drawing
Read the decisions behind it.
01
Use of a 1N4007 blocking diode to prevent reverse current from battery to solar panel at night.
02
Inclusion of a 2A fuse for overcurrent protection on the battery line.
03
Simple SPST switch to toggle the fan motor, keeping the circuit minimal and easy to assemble.
Suitable for small off-grid cooling devices, emergency fans, or DIY portable fan projects with solar charging capability.
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