Description of  Circuit	orcad	pdf
Auto ranging 4-1/2 digit digital voltmeter ICL7135 of Intersil.	20003.zip
precision attenuator with digital control - use with above.	...
precision amplifier with digital control  - use with above.	...
Precision Attenuator and Amplifier - write up for above two here.	...
Fluid or Water Level Sensor using reed relays - idea here.	...
Fluid or Water Level Sensor using reed relays - circuit example	20024.zip

Some Pages Require Adobe Acrobat Reader with Web Browser Integration Enabled.