E)
We found this circuit in a PE Hobbyst Handbook from the 90s. The components are common, except the Geiger tube. The transformer is also a component that requires care when choosing.
This crystal oscillator circuit is indicated for use as a frequency reference in the calibration...
This circuit was obtained from the 1976 Siemens integrated circuits manual. It is the circuit for...
This simple circuit, powered by 4 batteries or 9 V battery, brings together several functions of...