一种利用打印并行口的数据采集器的设计

A design of data collector by using printing parallel port

论述了将一般微型计算机的打印并行口改成数据采集器的电路原理,并且提出了两种A/D转换器与打印并行口的连接方法,着重论述了选用打印并行口的8根数据线作为连接数据线,而选用接口状态线作为连接控制线的接线方法.通过试验证明这种改造完全能够应用在对数据采集速度要求不高的场合.

The paper describes the principle of electrical circuit used to change the MicroComputer's parallel port printing to data acquisitor.Two methods for coupling the A/D converter and the MicroComputer's parallel port is put forward.The method that uses the eight plies datawire as the junctor lines and uses the status lines of the parallel port as the junctor?control lines are explained.The test proves that the alternation can be used in these situation don't need high data?acquisition speed.