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[Training Camp] "HiSilicon Liuma" driver board simplified version

Overview

Previous layout:

Simplified version modification:

TypeC16 pins are not easy to solder, and there are already ready-made programmers. It is a bit wasteful to add a separate adapter. Each servo is 100mA, and 8 of them will not exceed 1A. Together with the peripheral circuits, the maximum power consumption is 1.5A. It can be used Power bank with 5V2A output (for SG90, other servos may not be able to power it). Therefore, the CH340 was removed and replaced with a TypeC 6-pin charging interface only, leaving a serial port interface and an external 5V power interface, which simplified some circuits while ensuring functions. For connecting a 7.4V battery to a 5V circuit, I do not have such a battery on hand, so I plan to install it on the board. Reserve it but don't post it. You can add it later if needed. In addition, the cc terminal of the typec interface is connected to a 5.1k pull-down resistor to allow the power bank to identify useful electrical equipment, otherwise some may not provide power.

Ideas for subsequent improvements:

Need to add power indicator light;

When using a power bank, the power supply is unstable. For 5V, a capacitor of more than 100uF must be added. For 3.3V, it is best to increase the capacitor;

To take advantage of the high-power and fast-discharging power bank capabilities, you can also add a decoy chip to make the power bank output greater and provide more stable power supply;

PCA9685 is not easy to buy. Either buy the module directly or find a suitable substitute;

The extended sensor mpu6050 supports reinforcement learning.

Design Files

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Update:2024-11-22 12:33:34

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