Phase indicator (CB8295E)

Found in 1980s documentation, this circuit indicates the phase of a three-phase signal from the power grid. The neon lamp is common.

| Clique na imagem para ampliar |

One Transistor DC Voltmeter (CB868E)
This simple circuit uses a 200 µA galvanometer to measure voltages in three ranges. The circuit...
Remote listening amplifier (CB21957E)
Today we can call this circuit a baby monitor. It is a microphone amplifier found in a publication by...
5 V x 1A Switching Regulator MC1723 (CB15331E)
This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of...