实验用的数字电位器电路,The experimenter's pot - Digital Potentiometer

Introduction

The experimenter's pot is a solid state potentiometer using Dallas semiconductor’s DS1869 and National’s LM78L05 two electrolytic capacitor two small push button switch and two optional Molex connector. this project is very useful especially in finding the right value of resistor in your experiments, you can attach this circuit to your next project that uses a pot or trimmer cause there are three types of DS1869 these are:

- DS1869-10 which is 10K
- DS1869-50 a 50K version
- DS1869-100 the 100K version
 

Schematic
 

Description

As you can see, the circuit is powered from a 9V power supply (actually any 9V power source will work, as long as the current rating is not less than 25mA) stepped down to 5V by the LM78L05 IC and two filter capacitor height=497 src="/data/attachment/portal/201007/ET34042201007230511552.jpg" width=725 border=0>

PCB