- Dec 18, 2013
- Reaction score
Good work Doc
Actually the coil is on the weaker side and is too slow by messing with the spring it allows it to work with the weaker coil.DOC1955 how did you get the relay to oscillate?
I suppose you rigged the contact to cut off the battery as soon as the armature pull in.
If that is so, then the relay is not defective, it simple has not enough time to completely pull and it probably sing at high frequency. By weakening the spring there is enough inertia in the armature to keep moving after cut off, that would result in a lower switching frequency and work as you expected.
A more refined way would be to delay the action of cutting off the coil drive with a transisto and a delay network. Then you can control the frequency and have enough time for the coil to do a full pull, plus avoid messing with the relay.