Path: utzoo!attcan!lsuc!ncrcan!brambo!wwg
From: wwg@brambo.UUCP (Warren W. Gay)
Newsgroups: sci.electronics
Subject: Re: Need DC -> AC converter
Keywords: 12VDC to 12VAC
Message-ID: <560@brambo.UUCP>
Date: 31 Mar 89 14:33:37 GMT
References: <5545@obdient.CHI.IL.US>
Reply-To: wwg@brambo.UUCP (Warren W. Gay)
Distribution: na
Organization: Bramalea Software Inc., Bramalea, Ont.
Lines: 16

In article <5545@obdient.CHI.IL.US> bear@obdient.CHI.IL.US (Harry Skelton) writes:
>I have a kit "clock" that I purchased the other day but due to the
>unlisted design I was unaware that it required 12V AC rather than the
>12V DC I was looking for...

Probably the only need for AC stems from the need for a 60 Hz (cycle) 
time base.  It will likely run on 12VDC if applied in the correct places,
but a "quick 'n dirty" would be a 555 timer to derive a 60 Hz signal
for the clock input (I'm assuming you have a schematic).

The 555 timer is truly the "dirty" way to do it-- but if its just for your car
then it might be accurate enuf for the job.  If you're prepared to do more
work, I'm sure that others can provide you with directions for a crystal
controlled time base.

73s de VE3WWG.