Using JFETs, this circuit from a 90’s American documentation can generate signals of 0.15 Hz. The JFET can be of any general-purpose type like the BF245 or MPF102.
This interesting digital counter with relays with complementary outputs was found in the Radio...
The idea of this circuit is that when the device in SO1 is turned on, the device connected to...
This interesting circuit allows to obtain symmetrical voltages from a simple battery. Among its...