We found this circuit in the April 1996 issue of Electronics Now magazine. The circuit uses a symmetrical source and is part of an instrumentation project.
This circuit activates a machine to dry hands (fan and heater) when the sensor detects the...
The operational used is like the 741. The circuit is from the datasheet and the formula that...
The second order filter shown in the figure is suggested by Texas Instruments, based on the TL081...