今天的微控制器速度已经可以通过软件轻而易举地实现这一切。而且更妙的是电压表和电流表成了免

费的副产品。微控制器的控制环无论如何都必须知道电压和电流值。你刚好也要显示它。我们要从微控制

器得到的是：一个在所有时间都用来测量电压和电流的A/D 转换器；一个根据命令为功率三极管提供基准

电压的D/A 转换器。问题是那个D/A 转换器的速度要非常快。如果在输出端检测到了短路，那么我们必

须立即减小三极管B 极上的电压，否则这个三极管就会损坏。“快速”意味着要达到毫秒级，如同运算放

大器一样。Atmega8 的A/D 转换器已经足够快了，但显然它没有D/A 转换器。使用脉宽调制和模拟低通滤

波器是可以得到一个D/A 转换器的，但是这样速度太慢了，无法通过软件立即实现短路保护。-The speed of today s micro-controller has been easily achieved through software, all that. And even more interesting is the voltage meter and ammeter become free

Charge by-product. Micro-controller control loop in any case have to be aware of voltage and current values. You have to show that it happened. We must microcontroller

Device get is: 1 at all times be used to measure voltage and current of the A/D converter　one under the command and provide the basis for the power transistor

Voltage of D/A converter. The problem is that D/A converter to be very fast speed. If the output short circuit is detected, then we must

Shall immediately reduce the voltage on the transistor B pole, otherwise the transistor will be damaged. "Fast" means to achieve milliseconds, as the operator put

Like Da-qi. Atmega8 of the A/D converter has been fast enough, but apparently it does not D/A converter. The use of pulse-width modulation and analog low-pass filter

Wave device be able to get a D/A