This analog volt-ammeter was found in an Electronics World of 1968. It makes use of a 0-1 mA analog milliammeter. Accuracy depends on the components.
This configurable CMOS configuration for frequencies up to a few megahertz was obtained in an...
In the figure we have the way to implement a NO OR or NOR gate with an operational amplifier. The...
This input circuit for meters, which can also be used as a shield, is intended for operation with...