This circuit is from American documentation from the 70s. The circuit makes use of the operating system of the time, but it can be implemented with more modern equivalents.
This circuit was found in a 1998 documentation. It is an alarm that uses common components that...
This band rejector filter, which uses the 741 again, prevents signals of a certain frequency, in...
The amplifier shown in figure 2 is based on the MAX9715 integrated circuit from Maxim...