Roman numeral display (CB22160E)

This circuit shows numbers I II and III when mounted on its side, depending on the position of the selector switch.

CMOS logic test (CB8910E)
This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of...
MEMS inertial sensor Gyroscope (CB15579E)
The circuit in the figure is suggested by ST Microelectronics (www.st.com) and consists of a...
LDR Controlled Flasher (CB6763E)
We found this circuit in a 1965 General Electric manual. The circuit applies to incandescent lamps only and...