如果小电流控制需要大电流的步进电机，可以实现吗？用什么IC？

用分立器件，逐级提高电流增益。
这是1970年的基础。
以下都验证过。
The next generation keyboard, future keyboard!
It challenged and subverted the global computer keyboard, keyboard music instruments 25 years ago，
The pioneer of the Chinese people (firstly) originally entered this area. who sent it into the modern house of the CEO of Microsoft?
To challenge AT&T of the United States by improving communication deficiencies
Improving communication deficiencies, Chinese people are to challenge AT&T of the United States.