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现主要介绍的是利用集成电路设计的一种高稳定恒温电路。采用的各部分电路分别为恒压电源电路、模拟采样电路、数字A/D转换电路、51单片机控制电路、键盘输入电路、数字显示电路和温控电路。其中模拟采样电路采用SSR器件,而A/D转换电路采用的是四位半的高精度转换器件,它与51单片机配合选用特殊的电路可实现17BIT的精度,故得到的结果可以精确到0.05℃,只要通过改变软件就可以改变精度,故升级简单方便。
The main introduction is the use of integrated circuit design of a high stability constant temperature circuit. The circuits used are constant voltage power supply circuit, analog sampling circuit, digital A / D conversion circuit, 51 single-chip microcomputer control circuit, keyboard input circuit, digital display circuit and temperature control circuit. Which uses SSR analog sampling circuit devices, and A / D converter circuit is used in four and a half of the high-precision conversion device, which with the 51 single-chip microcomputer with a special circuit to achieve the accuracy of 17BIT, the result can be accurate to 0.05 ℃ , As long as you can change the accuracy of the software can change, so easy to upgrade.