This circuit was taken from an article in Electronics Now magazine in February 1995. The power supply must be dual and other operational amplifier can be used.
Using the Linear Technologies LT3080 IC we have a constant current source with a 10 V voltage...
This circuit generates a siren sound. It was found in the April 1969 Radio Electronics magazine. The...
This circuit prevents the passage of frequencies in a range starting at 1 kHz and can be adjusted...