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 uses two Raytheon RC4558 operational amplifiers that are similar to the 741. The...
This audio amplifier circuit is from Ibrape's technical documentation from the 70's. The BC177 can be...
This progressive circuit has a lock allowing coded activation. We found this configuration in...