Planning the circuitry
Only the model without any circuitry would be a brawn no brains. Here details snippets of our circuit building journey.
Circuitry schematics
- A V1031 V1039 Li-ion Charger with a type-c input is used to charge the [18650 Li-ion battery]
- The V1031 V1039 Li-ion Charger symbol does not exist so it will be created and named with KiCAD Symbol Conventions
- A Misc BMS PCB is used interface between the 18650 Li-ion battery and the charging power source + components to power
- The output voltage ranges from 14.4V at low capacity and 16.8V at high capacity
- A Raspberry Pi 4B is used to emulate the Raspberry Pico as the brain of the system
- The Raspberry Pico cannot exceed 5v/1S voltage
- The LM2596S-ADJ Buck Converter steps down the voltage from 14.4V to 5V (more details)
- Power is supplied via VSYS, pin 39
- The L298N Dual H-bridge Motor Driver is added for the Raspberry Pico to interface with the RS-550 Brushed DC Motor
- A Misc Button is added for the user to interface with the product
- eg. click(turns on at lowest speed). clicks(raise speed). click(at max speed turns motor off)