We found this circuit in an old Mullard (Philips) documentation on the 555 and 556 integrated circuit (double 555). The relay must be 12 V with contacts that support the horn current.
This amplifier with antique germanium transistors is from a 1968 publication. The circuit provides...
This circuit was found in an old documentation from 1968. The voltage gain is 70 and the...
This digital CMOS circuit generates sinusoidal signals from a 10 kHz rectangular signal. The...