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- Path: sparky!uunet!destroyer!gatech!psuvax1!psuvm!fwr100
- Organization: Penn State University
- Date: Tue, 26 Jan 1993 11:05:32 EST
- From: <FWR100@psuvm.psu.edu>
- Message-ID: <93026.110532FWR100@psuvm.psu.edu>
- Newsgroups: sci.electronics
- Subject: Re: Auto "tow" sensor idea needed
- References: <43975@sdcc12.ucsd.edu> <1993Jan26.145012.3014@uhura.neoucom.edu>
- Lines: 12
-
- I don't know how well the "turning wheel" method will work. A lot of towing
- companies use the little wheels that lift yours off the ground (dollies?).
- None of your wheels turn. If you have a front wheel drive car with the parking
- brake on, or 4WD, this is the only way they can tow it.
-
- Enough picking on other people's suggestions :-) Here's my idea -
- Have a multi-position tilt sensor. Basically, a pendelum that will touch one
- of several contacts depending on tilt. Once the system is armed, the alarm
- will sound if the pendelum changes position. Should be easy to build from
- some TTL gates - basically just a comparator and a shift register.
-
- -Frank
-