LED displays (TIL305, TIL308, etc.)

[Dave McGuire]

On Sep 30, 2008, at 11:16 PM, Roy J. Tellason wrote:
>>> I wouldn't mind playing with some,  if I had the appropriate
>>> transformer and such to drive them with.  Used to be that you  
>>> could get a
>>> transformer with a nominal 125VAC output fairly easily,  I  
>>> haven't looked
>>> to see if they're out there these days.
>>
>>    Ugh, line power.  Much safer to power stuff from low-voltage DC.
>
> I've been messing around with line power ever since I was a kid.   
> (And all the
> batteries were dead,  anyhow.  :-)  Not that big of a deal,  really.

   I've been messing with it for just as long, but still...ugh.  It  
is just a pain to deal with, IMO.

>> Try this step-up circuit; it is based on an MC34063 app note design
>> which I've tuned a bit and adapted for current component  
>> availability:
>>
>>    http://www.neurotica.com/misc/step-up-regulator.png
>>
>>    It's cheap, easy to build, and powers Nixies nicely.
>
> Yeah,  but a transformer,  bridge rectifier,  and filter cap is  
> *so* much
> simpler.

   Ugh. ;)

          -Dave

-- 
Dave McGuire
Port Charlotte, FL