Found in a Popular Electronics from the 80's, this circuit makes use of a time integrated to control a relay in a timed way. R2 determines the activation time.
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...
This source gently applies the voltage to the load, causing it to rise slowly, thus avoiding...
The circuit shown in the figure can be used on a data transfer bus using an appropriate family...