This oscillator provides a 1 MHz rectangular signal determined by the capacitors used. The circuit must be powered by a voltage of 5 V. The maximum frequency depends on the logic used.
Written in an article in Radio Electronics magazine in April 1987, this circuit triggers an alarm...
This circuit was found in the April 1993 Electronics Now magazine. With it, it is possible to...
This circuit was obtained in a1969 magazine. The magazine no longer exists, but the circuit can be...