This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
We found this circuit for vehicles with contact breakers ignition contacts (platinum) in the...
What this circuit does is act as an automatic gain control for an automotive stereo. It increases the...
The two-channel mixer shown in the figure is the ideal solution for cases where we need an...