BCD_TO_ANALOG_CONVERTER

Published:2009/6/25 2:05:00 Author:May | From:SeekIC

This circuit will convert four-bit BCD into a variable voltage from 0-9 V in 1 V steps. The SN74141 is a Nixie driver, and has ten open-collector outputs. These are used to ground a selected point in the divider chain determined by the BCD code at the input, and so produce a corresponding voltage at the output. Accuracy of the circuit depends on the tolerance of the resistors and the accuracy of the reference vol-tage. However, presets can be used in the di-viderchain, with correct calibration. The 741 is used as a buffer.



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