[GreenKeys] Snubbing of selector magnet

[Jeffrey D Angus]

On 7/22/2013 10:34 AM, Jim Haynes wrote:
> On Mon, 22 Jul 2013, Chris Elmquist wrote:
>>
>> yes-- so if we choose an opto that can handle anything as big as the
>> spike, we probably don't have to snub it at all.
>>
> Well, unless the turnoff is at least a little bit slow, the spike will
> rise in voltage until something stops it, whether by snubbing or by
> breaking down. 
And, that's why I've been playing with the LT Spice program. To look
at various methods of snubbing and to see what they really do, instead
of the "Well, we've always just used..."

Earlier some keying circuits were posted using the HSR312 coupler.
That doesn't seem to be available anymore, so I've decided to use a
Toshiba TLP227GA instead.

Jeff-1.0
wa6fwi