Technical > General Technical
Theft prevention
in4:
--- Quote from: Andre Jute on May 01, 2021, 04:14:24 pm ---My bike bites back. See:
http://thorncyclesforum.co.uk/index.php?topic=3930
and if you leave the thread before the end, the examples of my own snake biting me are in:
http://thorncyclesforum.co.uk/index.php?topic=3930.msg21571#msg21571
Still in a humorous vein: one of my hobbies is UHT (ultra high tension) thermionic tube audiophile amps with up to 2000V on them, and electrostatic loudspeakers with 5500V on them; even my electrostatic headphones have 600V between my ears -- they sound particularly good on Gregorian chant: nearer my God to Thee! https://www.audio-talk.co.uk/fiultra/JUTE%20ON%20AMPS.htm
I build my own UHT amps and rebuild the QUAD electrostatics as required.
So I am, albeit always warily, at home with electrics that can and will kill the careless and the uninvited. Sometimes I wonder if one could get away with giving a bike thief an electric shock, nothing lethal, just a very low current electrostatic sting six inches before he even touches the bike; a ring of security. (When I market it, it will of course be as The Ring of Fear!) Most tourers' bikes have a hub dynamo and when it isn't required for some other purpose like the lamp, it can charge up the capacitor that will power the security device. What I have in mind is that the would-be thief dismisses the first sting of electrostatic shock as a natural event familiar to us all, but that the capacitor will recover fast enough to give him a second hit, and a third and a fourth, until even the dumbest drug addict grasps that the shocks are aimed at him, that they will get very personal, even intimate, if he tries to ride the bicycle, and that he should move away right smartly.
It's a pity the police are so humourlessly woke these days.
Still, the n'lock is proof that not all good security devices need be boat anchors.
--- End quote ---
Drifting off into the long grass temporarily: The thought of Stravinsky’s Rite of Spring being heard your audio set up is surely one to relish. MP3’s squash everything!
Returning to the theft prevention theme: I recalled reading about Embassy’s in Havana and elsewhere being subject to some sort of attack that involved radio waves or something. Bit like some stores have high pitch frequency devices to stop teenagers congregating outside and causing trouble. Very Dystopian I know but I mused that some sort of unpleasant frequency emitting device might make a great anti-theft gadget. Might set the dogs off howling though 😂
Andre Jute:
--- Quote from: in4 on July 05, 2021, 12:49:39 am ---
--- Quote from: Andre Jute on May 01, 2021, 04:14:24 pm ---My bike bites back. See:
http://thorncyclesforum.co.uk/index.php?topic=3930
and if you leave the thread before the end, the examples of my own snake biting me are in:
http://thorncyclesforum.co.uk/index.php?topic=3930.msg21571#msg21571
Still in a humorous vein: one of my hobbies is UHT (ultra high tension) thermionic tube audiophile amps with up to 2000V on them, and electrostatic loudspeakers with 5500V on them; even my electrostatic headphones have 600V between my ears -- they sound particularly good on Gregorian chant: nearer my God to Thee! https://www.audio-talk.co.uk/fiultra/JUTE%20ON%20AMPS.htm
I build my own UHT amps and rebuild the QUAD electrostatics as required.
So I am, albeit always warily, at home with electrics that can and will kill the careless and the uninvited. Sometimes I wonder if one could get away with giving a bike thief an electric shock, nothing lethal, just a very low current electrostatic sting six inches before he even touches the bike; a ring of security. (When I market it, it will of course be as The Ring of Fear!) Most tourers' bikes have a hub dynamo and when it isn't required for some other purpose like the lamp, it can charge up the capacitor that will power the security device. What I have in mind is that the would-be thief dismisses the first sting of electrostatic shock as a natural event familiar to us all, but that the capacitor will recover fast enough to give him a second hit, and a third and a fourth, until even the dumbest drug addict grasps that the shocks are aimed at him, that they will get very personal, even intimate, if he tries to ride the bicycle, and that he should move away right smartly.
It's a pity the police are so humourlessly woke these days.
Still, the n'lock is proof that not all good security devices need be boat anchors.
--- End quote ---
Returning to the theft prevention theme: I recalled reading about Embassy’s in Havana and elsewhere being subject to some sort of attack that involved radio waves or something. Bit like some stores have high pitch frequency devices to stop teenagers congregating outside and causing trouble. Very Dystopian I know but I mused that some sort of unpleasant frequency emitting device might make a great anti-theft gadget. Might set the dogs off howling though 😂
--- End quote ---
I would be the last one to discourage the imaginative termination of bicycle thieves. But unfortunately the operative -- and limiting -- sentence in my screed that you quote is "It's a pity the police are so humourlessly woke these days." Everything I describe is possible and has been accidentally achieved by me. But it's not electrical feasibility that is the question here. Imagine what some copper who will come unsmilingly to your house to give you an official warning against using language that triggers some worthless snowflake, thereby defining a new thoughtcrime for which there is no legislation on the books, can and will do if you actually damaged, if only in some sense that an extremely woke doctor will certify, a would-be bike-thief by static electricity or an ultra-high-pitched sound...
More's the pity.
--- Quote from: in4 on July 05, 2021, 12:49:39 am ---Drifting off into the long grass temporarily: The thought of Stravinsky’s Rite of Spring being heard your audio set up is surely one to relish. MP3’s squash everything!
--- End quote ---
At the moment I'm listening to a horn loudspeaker of my own design and construction. See https://www.audio-talk.co.uk/fiultra/KISS%20194%20T91HWAF3.jpg The amp has only one small tube per channel for a glorious one-third of a watt. See https://www.audio-talk.co.uk/fiultra/KISS%20192%20T68MZ417A.jpg Circuit for this Minus Zero amp at https://www.audio-talk.co.uk/fiultra/t68mzwe417acircuit.jpg Much more for committed audiophiles at Jute on Amps at https://www.audio-talk.co.uk/fiultra/JUTE%20ON%20AMPS.htm Enjoy!
Brush2805:
--- Quote from: ourclarioncall on June 30, 2021, 12:58:15 am ---
--- Quote from: Brush2805 on June 29, 2021, 10:19:42 pm ---I commute on mine so don't have to carry the locks. I lock it with 4 locks.
--- End quote ---
I’m guessing you leave the locks at the place you commute to ?
--- End quote ---
Yes
JohnR:
--- Quote from: mickeg on June 27, 2021, 06:02:58 pm ---
--- Quote from: JohnR on June 27, 2021, 03:02:11 pm ---Last week I fitted one of these trackers https://www.amazon.co.uk/gp/product/B07Y1R58QD to my Mercury. ...
--- End quote ---
In a few months, please let us know what you think of that tracker.
--- End quote ---
A few comments about the tracker: Initially, the power drain was fairly high (ie struggle to run for one week on a full charge) but I then read the leaflet and set it to only check position when asked rather than more frequent automatic checking when movement is detected. This extends the battery time to several weeks but has the disadvantage that if the tracker is asked to report its position but is in a location (eg inside a building) where it can't get a GPS signal then it reports its last known position (ie when last asked to report its position) with the timestamp. And, if there's no phone signal then the tracker won't work.
I've also applied a BikeRegister permanent marking in a prominent place on the downtube. This should not only be a deterrent to anyone planning to steal the bike for resale but also provides a simple proof of ownership.
mickeg:
--- Quote from: JohnR on August 06, 2021, 02:10:47 pm ---...
A few comments about the tracker:...
I've also applied a BikeRegister permanent marking in a prominent place ...
--- End quote ---
Thanks for the update on the tracker.
There are a lot of bike thefts of higher end components that are fairly new in my area. The bike is stolen but the frame is trashed within hours, the components are untraceable.
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