RE: [CAD_CAM_EDM_DRO] Relay question about diodes across the coil

Diodes are a good idea for DC even if you don't care about the spike caused by the back emf. The relay will remain latched until it dissipates it's magnetic field. Assuming it doesn't destroy your driving electronics or short it's coils it can cause the relay to remain latched for a few seconds after the input is removed. So for the sake of speed it's a good idea to have the diode.

Paul Davis

On Sat, 10 Jan 2004 23:53:44 -0500, Jeff Goldberg wrote:
>�Jon:
>
>
>�On D.C. side, I'm not using transistors (sounds too much like
>�electronics), but there's no harm in putting $.35 diodes there
>�anyway.
>
>�On A.C. side, the capacitor and resistor go in series across the
>�coil (sanity check)?
>
>�Thanks,
>�Jeff
>