>
> On Fri, 16 Dec 1994, Werner Terreblance wrote:
>
> > Some manufacturers of remote controllers use encoder IC's entented for
> > simple remote control applications and not for high security environments.
> > These devices typically send only about 12 bits and that's it!
>
>   This is the way my Ungo transmitter is made. It has a 144049 buffer
> with some of it's pins soldered to gnd(or 5v, can't tell) for the code,
> and that is connected to a 145026 encoder which transmits nine bits.
>
>   Wouldn't be that hard for a thief with a little ee knowledge to hook a
> PIC up to it and cycle thru the possible combinations...
>

There's an ad in the latest Nuts & Volts magazine for just such a device.
Of course, only lock smiths and car repossesion professionals ;-) can
buy them.  It claims that in a mere 10 minutes, 90% of all car alarms
on the market can be "silenced".

Perhaps there *is* money for EE's on "the dark side".

cje

--
Chris Elmquist, N0JCF           On Dr. McCoy's tombstone: "He's dead Jim".
chrise@n0jcf.com
n0jcf@amsat.org