This 2005 Linear Technology circuit has separate outputs for monitoring the charge and discharge of a battery. Formulas next to the diagram let you calculate the components.
This circuit is from 1995 documentation. Integrated circuits are used which can still be found...
This simple circuit controls the brightness of an LED from LDRs, NTCs, PTCs or other resistive sensors....
This simple circuit allows testing of CMOS 4001 and 4011 integrated circuits. It consists of an...