Found in Electronics now from the 90s, this circuit uses a sensor from the time, which is difficult to find today. The circuit activates a sonalert-type buzzer.
A configuration like the one used with the 4013 is also suitable for the 4027. The amount of time...
Found in RCA documentation from the 1970s, this circuit is intended for firing thyristors in inverter...
The second order filter shown in the figure is suggested by Texas Instruments, based on the TL081...