Taken from a 1967 RCA publication, this circuit maintains a low current in the battery when it is charged. The components are from the era.
I found this circuit in a 1976 magazine, but it can still be easily assembled, as all components are...
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...
This circuit was found in documentation from the 90s. The operational amplifier admits an...