Discussion in 'Finished Projects' started by doc1955, Mar 16, 2019.
Good work Doc
Nice engine Doc. I will have to go through your video's . I seem to remember you making a video on buzz coils somewhere ,maybe on another forum.
I made a couple one where I show how to modify a cheap relay to make it work and one where I made a small Jacobs Ladder with a buzz coil.
Very interesting . I have a Red Wing engine I am going to start soon and this maybe the ticket for the ignition .
Very nice work.
I tore it apart and powder coated some of the parts. I don't do a lot during the summer in the shop. Usually to busy out side. Well today was a crappy day outside so I started putting her back together again. Not sure but I may powder coat the heads yet. I'll decide once I get her all back together and see how she looks.
Looks good! A great engine!
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.
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.
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