Optical isolator (CB9165E)

This circuit was found on an old EDN and can be used as a shield. Optical couplers are from the era and modern equivalents can be used.

| Clique na imagem para ampliar |

Signal conditioner (CB9453E)
This circuit is intended to recover a very weak signal at a receiver, for example, a CW signal or a...
Photodiode Amplifier (CB13150E)
National Semiconductor suggests the circuit shown in the figure for amplifying signals from two...
Pulsating Flood Alarm (CB12184E)
This circuit activates a relay when the water reaches the sensors. The circuit is from a Radio...