Hey mike, After much testing I'm basically back to square one. Seems the voltage dip when the unit powers on is always enough to make the relay trip on and off constantly, usually after the PSU has been running for about an hour or so (not hot at all) but after that I disconnect and reconnect and it will chatter the relay and never get up to full voltage (hover at about the cut point for the relay). No matter what circuit I use. Seems I may need to revisit your bistable suggestion. If I understand this correctly once powered on, even if the circuit dips in power it will ensure will keep power on to the relay until there is no power left ? I'm struggling to get my head around this bistable idea.
Here is the link I've been checking out, it still doesn't make 100% sense, any ideas on a solid ON switch/trigger thanks in advance, again....![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
**broken link removed**
Here is the link I've been checking out, it still doesn't make 100% sense, any ideas on a solid ON switch/trigger thanks in advance, again....
**broken link removed**
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