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echo: electronics
to: George White
from: Greg Mayman
date: 2004-03-26 08:45:00
subject: {at}%^{at}#$%^ VEROBOARD

-=> George White said to Mike Ross
 -=> about "{at}%^{at}#$%^ VEROBOARD" on 03-20-04  12:44.....


 GW> That would be better as a technical explanation. In fact older vehicle
 GW> flasher units were capacitor/relay oscilators. Time has dimmed the

We never had any like that here, on either locally made or
imported US/British/Euro/Japanese cars.

The only ones I saw before the electronic flashers were ALL
thermal types using a wire that expanded in length slightly when
heated, coupled with a magnetic circuit to give it some
hysteresis.

I have seen homemade ones using capacitors and relays, even made
some myself, but they needed either two relays or a microswitch
on the relay rather than a conventional contact.

But for a 12 volt relay the capacitors were in the thousands of
microfarads, and in the "old days" would have been far too bulky
and expensive for auto use.

   ,-./\
  /     \ From Greg Mayman, in beautiful Adelaide, South Australia
  \_,-*_/    "Queen City of The South"    34:55 S  138:36 E
       v

... Don't be afraid to go out on a limb...That's where the fruit is.
___ Blue Wave/386 v2.30

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