This setting is valid for other transconductance operational amplifiers. The circuit is from Motorola's 1990 Linear Databook. The power supply must be symmetrical.
This timer uses common components today. It activates a relay after intervals that can be adjusted up...
September 2016 - It can be obtained from Mouser Electronics the new ADC AD7779 from Analog Devices with...
Found in Popular Electronics from the 90s, this circuit consists of a timer that turns off the...