Third Order Low Pass Filter (CB25264E)

This circuit was found in the December 1990 issue of Radio Electronics magazine. It was used in a home theater sound system.

TLV521 Nanopower Operational Amplifier (COM079E)
August 2016 - It can be obtained from Mouser Electronics new operational amplifiers with extremely low...
12 V Voltage Monitor (CB19042E)
This circuit is from a 1988 American magazine, but it is still up to date due to the components it uses. It...
Touch Switch 4011 (CB16078E)
The bistable configuration in the figure can be used to turn a device on and off, or to produce a...