tag:blogger.com,1999:blog-6128259673414079672011-11-27T15:50:03.160-08:00Smithhttp://www.blogger.com/profile/05784982756555211771noreply@blogger.comBlogger21100tag:blogger.com,1999:blog-612825967341407967.post-6427127273813365372009-09-08T22:48:00.001-07:002009-09-08T22:48:26.155-07:00<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://4.bp.blogspot.com/_D5VMELhuBhg/SqdBoXsV_wI/AAAAAAAAABI/HUyVHbX54f8/s1600-h/electronic+schematics.jpg"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 238px; height: 320px;" src="http://4.bp.blogspot.com/_D5VMELhuBhg/SqdBoXsV_wI/AAAAAAAAABI/HUyVHbX54f8/s320/electronic+schematics.jpg" alt="" id="BLOGGER_PHOTO_ID_5379340441727926018" border="0" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/612825967341407967-642712727381336537?l=electronicsschematics.blogspot.com' alt='' /></div>Smithhttp://www.blogger.com/profile/05784982756555211771noreply@blogger.com0tag:blogger.com,1999:blog-612825967341407967.post-29225755035881914242009-09-08T22:47:00.000-07:002009-09-08T22:48:02.669-07:00his is a digitally controllable electronic potentiometer. The heart of the circuit is a 16 channel analog multiplexer. Controlled by the BCD value at the inputs, the output pin of the multiplexer (pin 1) is connected to any one of the 16 outputs. The output pins are connected with 1k resistors. The IC2 can therefore be considered as a linear potentiometer with 16 steps. The total resistance of the potentiometer is 15k. Other values or characteristics like positive logarithmic can also be achieved by using different resistor values.The setting of the potentiometer is controlled by the counter <acronym title="Integrated Circuit">IC</acronym> 4516.<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/612825967341407967-2922575503588191424?l=electronicsschematics.blogspot.com' alt='' /></div>Smithhttp://www.blogger.com/profile/05784982756555211771noreply@blogger.com1