Bruce L. Bergman wrote:

If you add a relay to a transistor drive circuit and you aren't
absolutely sure how well the device was engineered, put a back-EMF
diode or a neon lamp or other snubber across the coil leads.

Generally a 1N40001. I always wondered why many common relays like the Omron octal and 11
pin dc relays didn't have the diode installed already with polarity marked for coil.


Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller