Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
What differentiates this circuit from the many versions with the 4017, presented in our...
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
This circuit was found in Maxim's documentation from the 90's. The circuit provides 12 V x 120 mA....