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.

Photo receiver optimized for noise (CB8072E)
This receiver for optical signals is optimized for operation in high noise locations. We find it...
1.78 MHz Telephone Transmitter (CB16689E)
This 1992 circuit operates in the range of cordless phones used at the time. The circuit is based...
Shield for triac with TDA1024 (CB25080E)
We found this circuit in the October 1987 Radio Electronics magazine. The circuit uses an...