[chbot] Snubber circuits

[Mark Atherton]

1) Isolation Transformer, correctly grounded
2) x100 probe, correctly grounded
3) change of underwear.


> On 21 November 2018 at 09:24 Volker Kuhlmann <list57 at top.geek.nz> wrote:
> 
> 
> Does anyone have experience with measuring contact spikes at 240Vac? I
> don't feel like blowing up a scope...
> 
> There's a procedure for measuring the load inductance. Add a smallish
> RC snubber to the relay contact. Measure decay time. Add a known
> capacitance to the snubber capacitor, measure decay time again. The
> difference is determined by the load inductance (and the phase angle at
> turnoff time...).
> 
> Cheers,
> 
> Volker
> 
> -- 
> Volker Kuhlmann
> http://volker.top.geek.nz/	Please do not CC list postings to me.
> 
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